What is considered the most critical function of erythrocytes?
A. the transport of carbon dioxide
B. the transport of oxygen
C. buffering against changes in blood pH
D. assisting in clot formation
E. All of the answers are considered the most critical functions of erythrocytes.
Answer: B
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Which of the following amino acids is/are negatively charged at physiological pH?
A. serine B. aspartate C. glutamate D. serine, aspartate, and glutamate E. aspartate and glutamate
The frozen contraction of muscle cells called rigor mortis occurs because after death
a. ions are not available in muscle cells. b. tropomyosin breaks down quickly. c. neurotransmitters are no longer released. d. ATP production stops. e. muscle cells are flooded with neurotransmitters.
Which of the following functions would most likely be occurring in the structure surrounded by the
box in Figure 4-2?
a. apoptosis
b. dynein movement
c. formation of hydrogen peroxide
d. molecular chaperone activity
e. cholesterol synthesis
Cystic fibrosis is caused by a gene encoding a protein involved in ________
A) metabolism of adenosine triphosphate B) chloride transport C) oxygen transport in blood cells D) regulating cell cycle control E) None of these choices