Exam 2 V2: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
_____ form channels between cells, allowing ions and small molecules to diffuse directly from
one cell to other
Connexins
At the resting membrane potential, the electrochemical gradient for sodium across the membrane
is such that the net flux for sodium movement is directed ____, thereby causing the cell's
membrane potential to become more ____.
inward; positive
T/F Movement of K+ into cell requires energy expenditure, whereas movement of Na+ into the
cell does not
False
The concentration of an anion inside a cell is 0.3%. The concentration of this anion outside the
cell is 0.1%. Assuming the membrane is permeable to that ion, how could the cell obtain more of
the ion inside the cell?
Active transport
Non polar molecules are capable of crossing the membrane ____.
directly across the lipid bilayer
, Exam 2 V2: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
What part of a neuron releases neurotransmitters by exocytosis?
axon terminal
The autonomic nervous system innervates all the following effector organs and tissues except
_____.
skeletal muscles
T/F Some membrane carbohydrates act as CAM's (cell adhesion molecules).
False
The autonomic nervous system is
considered to be the involuntary branch of the efferent division of the peripheral nervous system.
The chemical force (concentration gradient) for which of the following ions is directed into the
cell?
Sodium only
What region of the diencephalon filters and refines sensory information, allowing us to direct our
attention to specific/important external stimuli?
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
_____ form channels between cells, allowing ions and small molecules to diffuse directly from
one cell to other
Connexins
At the resting membrane potential, the electrochemical gradient for sodium across the membrane
is such that the net flux for sodium movement is directed ____, thereby causing the cell's
membrane potential to become more ____.
inward; positive
T/F Movement of K+ into cell requires energy expenditure, whereas movement of Na+ into the
cell does not
False
The concentration of an anion inside a cell is 0.3%. The concentration of this anion outside the
cell is 0.1%. Assuming the membrane is permeable to that ion, how could the cell obtain more of
the ion inside the cell?
Active transport
Non polar molecules are capable of crossing the membrane ____.
directly across the lipid bilayer
, Exam 2 V2: BIOS 242/ BIOS242 Fundamentals
of Microbiology with Lab | Questions and verified
Answers |Latest 2026/ 2027 Update | Grade A|
100% Correct (Guaranteed Pass)—Chamberlain
What part of a neuron releases neurotransmitters by exocytosis?
axon terminal
The autonomic nervous system innervates all the following effector organs and tissues except
_____.
skeletal muscles
T/F Some membrane carbohydrates act as CAM's (cell adhesion molecules).
False
The autonomic nervous system is
considered to be the involuntary branch of the efferent division of the peripheral nervous system.
The chemical force (concentration gradient) for which of the following ions is directed into the
cell?
Sodium only
What region of the diencephalon filters and refines sensory information, allowing us to direct our
attention to specific/important external stimuli?
