BIOL 212 Quizzes (Study Set) With
Correct Answers
If a channel is lined with amino acids that have a net positive charge, which of the following
ions is/are likely to move freely through the channel?
a. Na+
b. Cl-
c. K+
d. Ca++ - CORRECT ANSWERS -b. Cl-
Which type of cell junction allows direct movement of substances from the cytoplasm of one
cell to the cytoplasm of an adjacent cell? - CORRECT ANSWERS -gap junctions
A carrier protein is a transmembrane protein that moves molecules across the membrane
through:
a. small gaps in the fluid portion of the membrane
b. a lipid-filled pore
c. a water-filled pore
d. opening its gate and allowing molecules through
e. conformational changes in the carrier protein - CORRECT ANSWERS -e. conformational
changes in the carrier protein
What feedback continually enhances the output, so that the regulated variable continues to be
moved in the direction of the initial change?
a. negative
b. positive
c. endocrine
d. exocrine
,e. feedforward - CORRECT ANSWERS -b. positive
Which of the following descriptions INCORRECTLY describes the tissue type?
a. Muscle tissue is specialized for contraction and generating force.
b. Epithelial tissue lines the inner surface of tubular structures in the body.
c. Nerve tissue is specialized for the transmission of electrical impulses.
d. Connective tissue is specialized for exchange between the internal and external
environments.
e. Epithelial tissue contains cells which are held together along their lateral surfaces by tight
junctions. - CORRECT ANSWERS -d. Connective tissue is specialized for exchange between the
internal and external environments.
The use of hormones, such as insulin and glucagon, to regulate glucose metabolism in the liver
is an example of:
a. an extrinsic control system
b. an intrinsic control system - CORRECT ANSWERS -a. an extrinsic control system
Where does the conversion of pyruvate to acetyl CoA occur in a cell?
a. in the ribosomes
b. in the mitochondrial matrix
c. in the cytoplasm
d. along the mitochondrial cristae
e. in vaults - CORRECT ANSWERS -b. in the mitochondrial matrix
Peripheral thermoreceptors monitor:
Select one:
a. core body temperature
b. blood temperature
c. temperature in the heart
, d. temperature in the hypothalamus
e. skin temperature - CORRECT ANSWERS -e. skin temperature
Which of the following is found in greater concentration inside the cell than outside?
a. potassium
b. water
c. sodium
d. both potassium and water - CORRECT ANSWERS -a. potassium
T/F: Heat stroke is characterized by excessive sweating. - CORRECT ANSWERS -False
One way that membrane surface area is increased in absorptive cells is through increasing the
___________ of the membrane facing the lumen.
Select one:
a. thickness
b. number of protein channels
c. folding
d. number of receptors
e. number of protein carriers - CORRECT ANSWERS -c. folding
Oxygen diffuses from blood into cells down its concentration gradient. As cells become more
active and oxidative phosphorylation increases in the cell, which of the following occurs?
a. The concentration gradient for oxygen increases and oxygen movement into the cell
increases.
b. The concentration gradient for oxygen decreases and oxygen movement into the cell
decreases.
c. The concentration gradient for oxygen decreases and oxygen movement into the cell
increases.
d. The concentration gradient for oxygen increases and oxygen movement into the cell
decreases.
Correct Answers
If a channel is lined with amino acids that have a net positive charge, which of the following
ions is/are likely to move freely through the channel?
a. Na+
b. Cl-
c. K+
d. Ca++ - CORRECT ANSWERS -b. Cl-
Which type of cell junction allows direct movement of substances from the cytoplasm of one
cell to the cytoplasm of an adjacent cell? - CORRECT ANSWERS -gap junctions
A carrier protein is a transmembrane protein that moves molecules across the membrane
through:
a. small gaps in the fluid portion of the membrane
b. a lipid-filled pore
c. a water-filled pore
d. opening its gate and allowing molecules through
e. conformational changes in the carrier protein - CORRECT ANSWERS -e. conformational
changes in the carrier protein
What feedback continually enhances the output, so that the regulated variable continues to be
moved in the direction of the initial change?
a. negative
b. positive
c. endocrine
d. exocrine
,e. feedforward - CORRECT ANSWERS -b. positive
Which of the following descriptions INCORRECTLY describes the tissue type?
a. Muscle tissue is specialized for contraction and generating force.
b. Epithelial tissue lines the inner surface of tubular structures in the body.
c. Nerve tissue is specialized for the transmission of electrical impulses.
d. Connective tissue is specialized for exchange between the internal and external
environments.
e. Epithelial tissue contains cells which are held together along their lateral surfaces by tight
junctions. - CORRECT ANSWERS -d. Connective tissue is specialized for exchange between the
internal and external environments.
The use of hormones, such as insulin and glucagon, to regulate glucose metabolism in the liver
is an example of:
a. an extrinsic control system
b. an intrinsic control system - CORRECT ANSWERS -a. an extrinsic control system
Where does the conversion of pyruvate to acetyl CoA occur in a cell?
a. in the ribosomes
b. in the mitochondrial matrix
c. in the cytoplasm
d. along the mitochondrial cristae
e. in vaults - CORRECT ANSWERS -b. in the mitochondrial matrix
Peripheral thermoreceptors monitor:
Select one:
a. core body temperature
b. blood temperature
c. temperature in the heart
, d. temperature in the hypothalamus
e. skin temperature - CORRECT ANSWERS -e. skin temperature
Which of the following is found in greater concentration inside the cell than outside?
a. potassium
b. water
c. sodium
d. both potassium and water - CORRECT ANSWERS -a. potassium
T/F: Heat stroke is characterized by excessive sweating. - CORRECT ANSWERS -False
One way that membrane surface area is increased in absorptive cells is through increasing the
___________ of the membrane facing the lumen.
Select one:
a. thickness
b. number of protein channels
c. folding
d. number of receptors
e. number of protein carriers - CORRECT ANSWERS -c. folding
Oxygen diffuses from blood into cells down its concentration gradient. As cells become more
active and oxidative phosphorylation increases in the cell, which of the following occurs?
a. The concentration gradient for oxygen increases and oxygen movement into the cell
increases.
b. The concentration gradient for oxygen decreases and oxygen movement into the cell
decreases.
c. The concentration gradient for oxygen decreases and oxygen movement into the cell
increases.
d. The concentration gradient for oxygen increases and oxygen movement into the cell
decreases.
