Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Question

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Answer 1

Question

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

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Students have asked these similar questions

Which of the following accurately describes the inducibility of adaptive immunity? A) a given immune response acts against a specific antigen possessed by a pathogen B) both cells and antibodies are involved in immune responses C) immune cells acting against a given pathogen increase greatly in number upon encountering that pathogen D) immune responses against previously encountered pathogens are faster and more potent E) immune responses against the body's own molecules do not normally occur F) pathogens stimulate cells involved in adaptive immunity

1. Which of the following is mismatched? a. regulatory T cells: release inhibitory cytokines to dampen the immune response b. helper T cells: directly target and kill cancer cells C. cytotoxic T cells: carry out cellular immune responses d. B cells: can be activated to produce antibodies 2. Which of the following is not one of the basic functions of the nervous system? a. Formulate responses to sensory stimulation b. Send signals rapidly between body parts c. Produce major body fluids such as plasma and interstitial tissue fluid d. Detect sense stimuli 3. One example of a function of neuroglial cells is to... a. Add myelin to axons b. Produce neurotransmitters c. Bind neurotransmitters d. Link one neuron cell to another at the synapse 4. Which of the following features of a system is unlikely to lead to a stable homeostatic system? a. Negative feedback b. Positive Feedback c. Redundancy d. Complexity 5. Homeostasis is illustrated in the human body by the effects of insulin on…

. Which of these is not part of insect immunity?(A) enzyme activation of pathogen-killingchemicals(B) activation of natural killer cells(C) phagocytosis by hemocytes(D) production of antimicrobial peptides

Answer 2

Question

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

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Answer 3

Question

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

Answer 6

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

Answer 7

Chapter 45, Problem 1TYK

Summary Introduction

Introduction:

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system, work independently of each other in defending against a particular pathogen.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Justification for the correct answer:

Option (a) states that ‘the three lines of defense work independently of each other in defending against a particular pathogen’. This is a true statement as each organism, which is exposed to the disease causing viruses and organisms, consists of three lines of defense against these threats. First line is physical barriers like skin, second line is innate immune system and third line of defense includes adaptive immune system. Notably, these three host defense lines take cumulative actions to defend the host against pathogenic microbes. Hence, option (a) is correct.

Justification for the incorrect answers:

Option (b) states that ‘physical barriers are part of the immune system. This statement is not true as physical barriers are not a part of immune system. The mammalian immune system of an organism is made up of innate and adaptive immunity. So, it is an incorrect option.

Option (c) states that ‘the adaptive immune system reacts faster to pathogens than the innate immune system. This is false as the innate immune responses are the first one to act when the host’s body is attacked by pathogenic microbes, whereas adaptive immunity takes several days to become protective. So, it is an incorrect option.

Option (d) states that ‘once the adaptive immune system is activated in response to a specific pathogen, the innate immune system stops functioning against that specific pathogen’. This is an incorrect statement because the innate and adaptive immunity take cumulative action against pathogens. So, it is an incorrect option.

Option (e) states that ‘white blood cells are the key participants in adaptive immunity but not in innate immunity’. This is an incorrect statement as the white blood cells are part of both innate and adaptive immune response. So, it is an incorrect option.

Hence, options (b), (c), (d) and (e) are incorrect.

Answer 12

Conclusion

Thus, it can be concluded that host defense system prevents the invasion of pathogens by the three lines of defenses i.e. physical barrier, innate immune system and adaptive immune system.

Answer 13

Ch. 45.1 - Prob. 1SB Ch. 45.1 - What are the key differences between innate...Ch. 45.2 - Prob. 1SB Ch. 45.2 - What processes specifically cause each...Ch. 45.2 - Prob. 3SB Ch. 45.2 - Prob. 4SB Ch. 45.3 - How, in general, do antibody-mediated and...Ch. 45.3 - Prob. 2SB Ch. 45.3 - Prob. 3SB Ch. 45.3 - What is clonal selection?

Immune system is the defense system of an organism which consists of various biological processes and structures that provide protection against various pathogens. The immune system must be able to identify variety of pathogenic microbes and to differentiate them from the host’s cells.

Answer to Problem 1TYK

Explanation of Solution

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Chapter 45 Solutions