10@10 gen physio

1.

1 point

The permeability of a solute in a lipid bilayer
will be increased by an increase in the

molecular radius of the solute

oil/water partition coefficient of the solute

thickness of the bilayer

concentration difference of the solute across the bilayer

2.

1 point

Solutions A and B are separated by a membrane
that is permeable to urea. Solution A is
10 mM urea, and solution B is 5 mM urea. If
the concentration of urea in solution A is doubled,
the flux of urea across the membrane will

double

triple

be unchanged

decrease to one-half

3.

1 point

Which of the following characteristics is
shared by simple and facilitated diffusion of
glucose?

Occurs down an electrochemical gradient

Is saturable

Requires metabolic energy

Is inhibited by the presence of galactose

4.

1 point

In error, a patient is infused with large volumes
of a solution that causes lysis of his red
blood cells (RBCs). The solution was most
likely

isotonic NaCl

isotonic mannitol

hypertonic mannitol

hypotonic urea

5.

1 point

Secretion of H + by gastric parietal cells occurs
by which of the following processes?

Simple diffusion

Facilitated diffusion

Primary active transport

Cotransport

6.

1 point

Transport of D- and L-glucose proceeds at
the same rate down an electrochemical gradient
by which of the following processes?

Simple diffusion

Facilitated diffusion

Primary active transport

Cotransport

7.

1 point

Which of the following causes rigor mortis?

A decrease in ATP level

An increase in intracellular Ca2+ level

A decrease in intracellular Ca2+ level

An increase in adenosine triphosphate (ATP) level

8.

1 point

During the upstroke of the action potential

there is net outward current and the cell interior becomes more negative

there is net outward current and the cell interior becomes less negative

there is net inward current and the cell interior becomes more negative

there is net inward current and the cell interior becomes less negative

9.

1 point

Which of the following is an inhibitory neurotransmitter
in the central nervous system
(CNS)?

Norepinephrine

Glutamate

Gamma-aminobutyric acid (GABA)

Serotonin

10.

1 point

The rate of conduction of action potentials
along a nerve will be increased by

stimulating the Na+-K+ pump

inhibiting the Na+-K+ pump

decreasing the diameter of the nerve

myelinating the nerve