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HCS 215 CHAPTER 4 TEST BANK | 110 QUESTIONS | WITH PASSED SOLUTIONS!!
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HCS 215 CHAPTER 4 TEST BANK | 110 QUESTIONS | WITH PASSED SOLUTIONS!!
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HCS 215 CHAPTER 4TEST BANK | 110
QUESTIONS | WITH
PASSED SOLUTIONS!!
HCS 215
Evatee 9/12/24 HCS 215
,HCS 215 CHAPTER 4 TEST BANK | 110
QUESTIONS | WITH PASSED SOLUTIONS!!
1) What is responsible for the unequal distribution of ions across a membrane,
thereby causing a charge?
A) the concentration of impermeable charged molecules
B) the ability of permeable ions to pass through a membrane
C) the concentration of carrier proteins in the membrane
D) the concentration of ions seeking equilibrium with respect to their charge
E) the semipermeable membrane Answer - A
2) The chemical force for which of the following ions is directed into the cell?
A) potassium only
B) sodium only
C) calcium only
D) both potassium and sodium
E) both sodium and calcium Answer - E
3) Which of the following is found in greater concentration inside the cell than
outside?
A) sodium
B) calcium
C) potassium
D) water
E) chloride Answer - C
,4) When molecules are passively transported across a membrane, the direction
of their movement is dictated by the molecule's tendency to move
A) from higher to lower energy.
B) from lower to higher energy.
C) out of a cell.
D) into a cell.
E) in both directions; there is no preference. Answer - A
5) Of the gradients listed below, which is the MOST accurate description of the
force that ultimately determines the movement of ions across the membrane?
A) chemical gradient
B) potential gradient
C) electrochemical gradient
D) concentration gradient
E) electrical gradient Answer - C
6) Molecules tend to move spontaneously ________ their chemical gradient.
A) down
B) up
C) through
D) around
E) over Answer - A
7) When more than one ion species (i.e., and ) is present on both sides of the
membrane, the chemical driving force acting on will include
A) all positively charged ions.
, B) all negatively charged ions.
C) the most concentrated ion only.
D) sodium only.
E) all ions present. Answer - D
8) Which of the following is a reflection of the unequal distribution of positive
and negative ions across the plasma membrane?
A) chemical gradient
B) extracellular potential
C) membrane potential
D) chemical driving force
E) electrochemical driving force Answer - C
9) Comparing intracellular to extracellular fluid, the intracellular fluid has a
________ charge relative to the outside of a cell due to the presence of more
________ in that solution.
A) positive : cations
B) negative : anions
C) negative : cations
D) positive : anions
E) neutral : cations Answer - B
10) The unequal distribution of charge in solutions on either side of a
membrane will lead to a ________ of charge across the membrane and a
________ of counter ions in a region close to the membrane.
A) separation : clustering
B) collection : restriction
C) buildup : restriction
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