The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These CD4T-cells are one of many kinds of white blood cells that are an important part of the immunesystem.The most common danger related to the destruction of CD4 T-cells is-A an increase in the risk of high blood pressureB an increase in the threat of diseases caused by microorganisms and virusesC a decrease in the flow of blood to vital organsDa decrease in the amount of oxygen being transported to tissues

Introduction Our immune system plays key role in defence against harmful foreign particles be it…

Answered: The human immunodeficiency virus (HIV)…

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter8: Blood

Section: Chapter Questions

Problem 5SQ: Which of the following statements about red blood cells is false? a. They live about 120 days before...

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Which of the following is NOT a component of the human body's second line of defense against pathogens? A) Platelets B) Blood clotting C) Vasodilation D) Antibodies E) Ferritin proteins F) Production of fibrin polymers
Which one is at the chemical level, considered non-living? A) lymph B) blood C) basophil D) valve E) liver
Which of the following has an incorrect association? a. Plasma- water, nutrients and wastes b. White blood cells - antibodies C. Red blood cells - clotting d. Blood platelets - hemoglobin
Which of the following statements about red blood cells is false? a. They live about 120 days before being replaced. b. They lack a nucleus and other organelles when they are mature. c. They are replaced when the hormone EPO stimulates stem cells in bone marrow. d. They are replaced as part of a negative feedback loop in which kidney cells monitor blood oxygen levels e. All the above statements are true except b, because all cells require a nucleus in order to function properly.
Which of the following statements is TRUE regarding the ABO blood system? People who have the B antigen would not produce the anti-B antibody. People who have the O blood type would not produce the anti-A and anti-B antibodies. People who have the A antigen would produce the anti-A antibody. People who have the AB blood type would produce the anti-A and anti-B antibodies.
The hematocrit is a measure of a. water concentration in the plasma. b. the percentage of formed elements in the blood. c. the number of platelets in the blood. d. antibody concentration in the plasma.
Which statement below best describes whether or not there is an advantage of using iPSCs to induce repair of bodily damage within a patient over using embryonic stem cells that have been donated? a. Because the iPSCs originated from the patient and thus probably will avoid rejection by the patient’s own immune system. b. Embryonic stem cells are easier to obtain. c. There are more ethical issues involved in iPSCs. d. Only embryonic stem cells are vastly renewable.
An individual with type B blood can donate blood to which blood type(s) during a transfusion? Group of answer choices B only B or AB B, AB, or O AB only O only
Which of the following sudden changes might be a result of an infection? a. increase in the activity of white blood cells b. decrease in the activity of antigens produced by the mitochondria c. decrease in the amount of DNA present in the nuclei of cells d. increase in the number of red blood cells
Blood clotting is a homeostatic response. When clotting is poor, even a slight injury to a blood vessel may lead to severe blood loss. When clotting is excessive, small blood vessels in critical places in the body can become clogged leading to clots. Excessive bleeding or excessive clotting both can be dangerous. – Describe the main stages in the formation of a blood clot and evaluate the importance of specific factors example platelets, vitamin K, air and blood proteins Injured tissue – exposure of endothelial cells Narrowing (constriction) of blood vessels Activity of platelets Activity of clotting factors
Ibuprofen dampens the immune system’s inflammation response.What might be a short-term consequence of taking ibuprofen?a. Blood vessels may become less permeable.b. Antibodies may become less active.c. Cytotoxic T cells may begin to divide.d. All of the above are correct
An experiment tested the hypothesis that exposure to pesticides decreases immune function in tadpoles. The researchers raised tadpoles in groups, in containers of the same size in a room with consistent temperature and lighting. They exposed some tadpoles to no pesticides, some to low pesticide levels, and some to high pesticide levels, and then measured the density of white blood cells (immune cells) in the tadpoles. Part a: The researchers used a(n) ______________ experiment to show the effects of pesticides on tadpoles. Group of answer choices A. natural history B. laboratory C. field D. quantitative model E. observational part b: What is the dependent variable in this experiment? Group of answer choices A. consistent temperature B. density of white blood cells C. level of pesticides D. intensity of lighting E. number of tadpoles part c: The negative control treatment in the experiment was the: Group of answer choices A. tadpole group receiving no…

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