Question 1

Which of the following evolutionary adaptations would you expect to find in the cell membranes of Antarctic icefish?

Accepted Answer

A)  a high percentage of very long chain saturated fatty acids
B)  no cholesterol
C)  a high percentage of unsaturated fatty acids
D)  a high percentage of carbohydrates on membrane lipidsE) A) and B)
F) B) and C)

Question 2

Which of the following membrane proteins tend to lack hydrophobic regions on their surfaces?

Accepted Answer

A)  transmembrane proteins
B)  integral membrane proteins
C)  peripheral membrane proteins
D)  integrinsE) C) and D)
F) B) and D)

Question 3

The rate of diffusion of glucose through artificial phospholipid bilayers is exceptionally low.By contrast,the cells lining the small intestine rapidly transport large quantities of glucose from glucose-rich food into their glucose-poor cytoplasm.Based on this information,which transport mechanism is most likely responsible for glucose transport in the intestinal cells?

Accepted Answer

A)  simple diffusion
B)  phagocytosis
C)  active transport pumps
D)  facilitated diffusionE) A) and B)
F) C) and D)

Question 4

Thinking about the environments where plant and animal cells typically exist,which of the following statements is correct?

Accepted Answer

A)  Animal cells are generally in a hypotonic solution,and plant cells are generally in an isotonic solution.
B)  Animal cells are generally in an isotonic solution,and plant cells are generally in a hypotonic solution.
C)  Animal cells are generally in an isotonic solution,and plant cells are generally in a hypertonic solution.
D)  Animal cell are generally in a hypertonic solution,and plant cells are generally in an isotonic solution.
E)  Animal cells are generally in a hypertonic solution,and plant cells are generally in a hypotonic solution.F) C) and D)
G) B) and C)

Question 5

An accident victim has lost a lot of blood due to a serious injury.Replacement of the lost body fluids with distilled water would have which of the following results?

Accepted Answer

A)  It will have no unfavorable effect as long as the water is free of viruses and bacteria.
B)  The patient's red blood cells will shrivel up because the blood fluid has become hypotonic compared to the cells.
C)  The patient's red blood cells will swell and lyse because the blood fluid has become hypotonic compared to the cells.
D)  The patient's red blood cells will shrivel up because the blood fluid has become hypertonic compared to the cells.E) A) and D)
F) All of the above

Question 6

The cytoplasmic side of a cell membrane is negative in charge relative to the extracellular side.What is the voltage across a cell membrane called?

Accepted Answer

A)  water potential
B)  chemical gradient
C)  membrane potential
D)  osmotic potential
E)  electrochemical gradientF) A) and D)
G) C) and D)

Exam 5: Membrane Transport and Cell Signaling

Thinking about the environments where plant and animal cells typically exist,which of the following statements is correct?

Correct Answer
verified

Correct Answer
verified

The cytoplasmic side of a cell membrane is negative in charge relative to the extracellular side.What is the voltage across a cell membrane called?

Correct Answer
verified

An accident victim has lost a lot of blood due to a serious injury.Replacement of the lost body fluids with distilled water would have which of the following results?

Correct Answer
verified

Which of the following membrane proteins tend to lack hydrophobic regions on their surfaces?

Correct Answer
verified

Which of the following evolutionary adaptations would you expect to find in the cell membranes of Antarctic icefish?

Correct Answer
verified

Exam 5: Membrane Transport and Cell Signaling

Thinking about the environments where plant and animal cells typically exist,which of the following statements is correct?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The cytoplasmic side of a cell membrane is negative in charge relative to the extracellular side.What is the voltage across a cell membrane called?

Correct AnswerverifiedShow Answer

An accident victim has lost a lot of blood due to a serious injury.Replacement of the lost body fluids with distilled water would have which of the following results?

Correct AnswerverifiedShow Answer

Which of the following membrane proteins tend to lack hydrophobic regions on their surfaces?

Correct AnswerverifiedShow Answer

Which of the following evolutionary adaptations would you expect to find in the cell membranes of Antarctic icefish?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified