HUMAN ANATOMY+PHYSIOLOGY-ACCESS(IAC)
11th Edition
ISBN: 9780134788784
Author: Marieb
Publisher: PEARSON
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Chapter 3, Problem 12RQ
A physiologist observes that the concentration of sodium inside a cell is decidedly lower than that outside the cell. She also observes that there is a small leakage of sodium into the cell. What cellular process prevents the sodium concentration gradient from disappearing? (a) osmosis, (b) diffusion, (c) primary active transport, (d) secondary active transport.
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The metabolic pathway below is used for the production of the purine nucleotides adenosine monophosphate (AMP) and guanosine monophosphate (GMP) in eukaryotic cells. Assume each arrow represents a reaction catalyzed by a different enzyme. Using the principles of feedback inhibition, propose a regulatory scheme for this pathway that ensures an adequate supply of both AMP and GMP, and prevents the buildup of Intermediates A through G when supplies of both AMP and GMP are adequate.
QUESTION 27
Label the structures marked A, B, C and explain the role of structure A.
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plasma membrane
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Chapter 3 Solutions
HUMAN ANATOMY+PHYSIOLOGY-ACCESS(IAC)
Ch. 3 - Prob. 1RQCh. 3 - 2. The major types of lipid found in the plasma...Ch. 3 - 3. Membrane junctions that allow nutrients or ions...Ch. 3 - Prob. 4RQCh. 3 - A physiologist observes that the concentration of...Ch. 3 - 8. The endocytotic process in which a sampling of...Ch. 3 - Prob. 6RQCh. 3 - 11. The information sequence that determines the...Ch. 3 - 13. The phase of mitosis during which centrioles...Ch. 3 - 15. The RNA synthesized on one of the DNA strands...
Ch. 3 - 16. The RNA species that travels from the nucleus...Ch. 3 - 17. If DNA has a sequence of AAA, then a segment...Ch. 3 - 18. A nerve cell and a lymphocyte are presumed to...Ch. 3 - 19. A pancreas cell makes proteins (enzymes) that...Ch. 3 - 21. Contrast the roles of ER-bound ribosomes with...Ch. 3 - Prob. 11RQCh. 3 - 24. Comment on the role of the sodium-potassium...Ch. 3 - 25. Differentiate between primary and secondary...Ch. 3 - 26. Cell division typically yields two daughter...Ch. 3 - 2. A “red-hot” bacterial infection of the...Ch. 3 - 3. Two examples of chemotherapeutic drugs (drugs...Ch. 3 - 5. In their anatomy lab, many students are exposed...Ch. 3 - 6. Dynein is missing from the cilia and flagella...Ch. 3 - 7. Explain why alcoholics are likely to have much...Ch. 3 - 8. Fresh water is a precious natural resource in...
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