1 Guided Notes Homeostasis & Membrane Transport

8. Define homeostasis. maintoining nterral balance 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?

The negatively charged intracellular environment and resulting resting membranepotential of neurons and muscle cells fundamentally develops because of:A. the presence of a high extracellular potassium concentration.B. the presence of negatively charged intracellular proteins.C. the high electron concentration found in the extracellular fluidsD. the presence of voltage-gated-sodium channells

Role of Homeostasis in Human Physiology: A Review After reading the article, research what disorders result from loss of homeostasis. Choose 2 disorders, provide an overview of the diseases, characteristics of the normal homeostatic mechanisms, what aspects of the mechanisms are disrupted, and what treatments are used to restore normal homeostasis or treat the symptoms of the disorder.

( deeply explain all point of question with proper answer).

. The is primarily responsible for establishing the negative resting membrane potential of neuronal cells and is an example of transport system.

Hello, please answer the following Physiology question completely and correctly. Thank you.  Physiology Question:  "Based on the attached picture, please answer the question regarding the two columns correctly and completely". Thank you.

1) As a physiologist, which of the following terms should you immediately associate with negative feedback regulation? Answer choices Constancy Relative constancy Relative constancy in interstitial fluid Relative constancy in intracellular fluid 2) Which of the following is true about physiological set-points? Answer choices  They act as the integrating center in a negative feedback arc They represent the internal environment They are determined by the actions of the receptors and integrating centers They are constant They act as the effector in a negative feedback arc 3) What is the general purpose of negative feedback mechanisms? Answer choice a. to maintain a constant internal environment b. To anticipate changes in the environment c. To return a variable to its set-point d. To bring about the rapid change of a variable e. To detect changes in the external environment

states the five functions of a globular protein and an example for each.

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Checkpoint: Diffusion (1 point each) For each of the following diagrams, indicate the net direction of movement of each substance. Assume that the semipermeable membrane allows glucose, water, and IKI to diffuse freely but prevents sucrose and proteins from passing through. 1. What is the net direction of glucose? What is the net direction of IKI? 20% glucose 5% glucose 20% IKI 10% IKI What is the net direction of protein? 0% protein 5% protein 75% water 65% water What is the net direction of water? Diffusion, Osmosis, and Tonicity 2. What is the net direction of glucose? What is the net direction of IKI? 20% glucose 20% glucose 30% IKI 10% IKI What is the net direction of water? 45% water 65% water 5% sucrose 5% sucrose What is the net direction of sucrose? 3. What is the difference between osmosis and diffusion? (2 points)

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rections: Create a concept map of homeostasis by filling out the white-filled xes. Afterwards, research other examples of the mechanisms and corporate in the concept map by filling out the gray-filled boxes. Write your swers on a separate sheet of paper. 1. 2. 3. 4. 16. Variable 17. 5. sense the change in the variable 18. 6. compares against the reference value (7. 18. 8. make adjustments in the 9. direction as initiation event 19. 10. 20. Galle Variable 21. 11. change in the variable 22. 12. compares against the reference value (13. 23. 14. make adjustments in the 15. direction as initiation event 24. sense the

Calcium ions (Ca?+) are a typical cell at rest. a. more concentrated in the cytosol of b. equally distributed across the membrane of c. more concentrated in the extracellular fluid of

9. If sodium permeability (Pna) increases compared to normal, what is the effect on the membrane potential? (determine: change in charge on the inside of the membrane and polarity)

2. Circle the correct bolded blue word. a. A substance that moves across a membrane "down" or "with" their concentration gradient is moving from the side with a higher / lower concentration of that substance to the side with a higher / lower concentration. This does / doesn't require energy input and is called active / passive transport. b. A substance moving "against" or "up" its concentration gradient is moving from the side with a higher / lower concentration of that substance to the side with a higher / lower concentration. This does / doesn't require energy input and is called active / passive transport. c. If the energy from the hydrolysis of ATP is directly used to pump the substance, the transport is called primary /secondary active transport. d. Ion-coupled transport is primary /secondary active transport and has two parts. First, the hydrolysis of ATP is used to power the creation of an ion concentration gradient. The ion is typically Na* or H*. Second, the energy stored in…

If sodium permeability were to increase compared to normal what would be the resulting effect on the membrane potential 1.The charge on the inside of the cell becomes less negative compared to resting conditions and hyperpolarizes 2.The charge on the inside of the cell becomes more negative compared to resting conditions and hyperpolarizes 3.The charge on the inside of the cell becomes less negative compared to resting conditions and depolarizes 4.The charge on the inside of the cell becomes more negative compared to resting conditions and depolarizes

B. Facilitated diffusion: This process does- not require ATP but does require cell * membrane proteins True False O

Fish Cell Physiology Compare and contrast the movement of salt ion in the tissues of a living fish and the tissue of a dead fish, is it similar?  What goes in and goes out of the cell? Is it water or salt, discuss in both the living and the dead fish. Discuss what particular part of the cell and the mechanism of this process.

1.what is the importance of membrane transport and what are the values that you need to develop after knowing the importance of it? 2.what can happen when an organism lacks the necessary enzymes? 3.how do enzymes aid in harnessing the energ from the food we eat? 4.how are the enzyme activity affected by concentration of substrate, changes in temperature, and ph?

Na+/K+ ATPase (sodium potassum adenosine triphosphatase) is found in the plasma membrane and catalyzes the exchange of sodium and potassium ions across the membrane. Classify the statements about the transport system as either true or false. Macmillan Learning True Pumps Na+ ions out of the cell. Pumps Na+ ions into the cell. Pumps K+ ions out of the cell. Pumps K+ ions into the cell. Exchanges 3Na+ ions for 2K+ ions. Creates a membrane potential that is negative on the inside. The transport protein becomes adenylated by ATP during the transport cycle. False Exchanges 3K+ ions for 2Na+ ions.

1. Frog skin is an excellent system for studying sodium transport across an epithelium. Frog skins is stripped from the frog's leg and tied into a sack. The inside of the sack is the internal (extracellular fluid) surface of the frog skin. The sack is filled with normal frog saline and the filled sack is placed in a beaker filled with the same saline. The recording electrode of a voltmeter is placed inside the sack and the ground electrode is placed in the bath. a. (Draw a picture to help you visualize this arrangement.) b. When the electrodes are first placed, there is no transepithelial potential difference. c. After an hour, the transepithelial potential is +20, inside the sack relative to outside.

compare and contrast the four in tables 1. active and passive transport 2. action membrane potential and resting membrane potential  3. endocrine and exocrine glands

Provide and explain 3 factors  that affect cell membrane permeability?

What sort of cellular changes would you expect a sailor sick with scurvy to experience? O Their collagen (an extracellular matrix component) would be diminished, resulting in fewer binding sites for integrins. The end result would be less adherent cells. O Their collagen (a cytoskeletal fiber) would be diminished, resulting in a loss of contractile motion within the cell, affecting both cell migration and muscle function.

Briefly describe the significance of permeability and ionic concentrations in the process of maintenance of cellular membrane potential.

Write a note on negative feedback mechanism and positive feedback back mechanism with two examples of each in the form of flow chart?

1) whether the statement is correct or incorrect and 2) the reasoning for your answer. Your answer should demonstrate your understanding of the physiological concepts underlying the statement and be professionally written.  Assume a cell with the following properties: [Na]out = 120 mM; [Na]in = 12 mM [K]out = 5 mM; [K]in = 125 mM Membrane is permeable only to Na+ and K+ If the plasma membrane of the cell becomes more permeable to Na+, both influx of Na+ into the cell and the Na+ equilibrium potential will increase.

How does investigating the homeostasis changes during exercise illustrate homeostatic feedback mechanisms in three ways?  Note - Please put emphasis on homeostasis changes during exercise and don't bring much of chemistry into it.

Differentiate Human Anatomy from Human Physiology 2. Describe the main divisions of Human anatomy 3. Describe the main divisions of Human Physiology 4. Explain the term homeostasis and the process of homeostasis regulation. 5. Discuss the different levels of structural organization of the human body 6. Describe a person in anatomical position 7. Describe the following imaginary planes a. Sagittal plane b. Midsagittal plane c. Coronal plane d. Horizontal plane 8. Discuss the following anatomical terms used for the different parts of the body to describe their relations with one. a. Anterior and Posterior b. Superior and Inferior c. Medial and Lateral d. Superficial and Deep e. Proximal and Distal

d. Arrange the following according to decreasing rate of diffusion across the membrane. Glucose-- Oxygen-- Ferric ion--- Water--- Briefly explain the FACTORS considered in answering the above question. This can be explained in 50 words.

Answer these 2 questions please.

: Transcellular fluid is Specialized type of intercellular fluid O Found in confined space O includes fluid in synovial C 2+3 None of the following O

Identify the four components of a negative feedbackloop and explain what would happen if secretion of a bodychemical controlled by a negative feedback system becametoo great.