A&P Straighterline Final Exam |
Practice Questions and Answers
Graded A+ |Latest 2024
Which of the following is NOT true of reactive astrocytosis?
Select one:
a. injury site is blocked off
b. scars limit regeneration
c. causes the spread of inflammation
d. reduces injury to surrounding tissue
Feedback - Correct Answer -c. causes the spread of inflammation
Which of the following is NOT true about astrocytes?
Select one:
a. They can wall off an injury site to prevent spread of inflammation.
b. They can prevent toxic substances from entering brain tissue.
c. They can release chemicals that promote formation of synapses.
d. They can aid in the regeneration of injured neurons. - Correct Answer -
d. They can aid in the regeneration of injured neurons.
Neurotransmitter is being released at a synapse. Which of the following
occurs last?
Select one:
a. Calcium ions enter the presynaptic terminal.
b. Synaptic vesicles release neurotransmitter by exocytosis.
c. An action potential is produced in the postsynaptic membrane.
,d. Neurotransmitter flows rapidly across the synaptic cleft.
e. Neurotransmitter binds with the receptor on the postsynaptic membrane.
- Correct Answer -c. An action potential is produced in the postsynaptic
membrane.
Depolarization of the nerve cell membrane occurs when there is a rapid
influx (inflow) of
Select one:
a. potassium ions.
b. chloride ions.
c. calcium ions.
d. sodium ions.
e. proteins. - Correct Answer -d. sodium ions.
In some cells, an afterpotential occurs because
Select one:
a. the sodium ions continue to enter the cell after depolarization is finished.
b. there is prolonged, elevated permeability to potassium during
repolarization.
c. the sodium-potassium pump is actively exchanging ions across the
membrane.
d. the extracellular Na+ ion concentration is reduced.
e. the permeability to sodium continues longer than necessary. - Correct
Answer -b. there is prolonged, elevated permeability to potassium during
repolarization.
The patellar or knee-jerk reflex is a classic example of
Select one:
,a. the Golgi tendon reflex.
b. the withdrawal reflex.
c. the stretch reflex
d. the crossed extensor reflex.
e. reciprocal innervation. - Correct Answer -c. the stretch reflex
Depth perception
Select one:
a. relies on monocular vision.
b. does not require cerebral interpretation.
c. requires the image to strike the retina of both eyes in exactly the same
way.
d. is the ability to distinguish between near and far objects and judge their
distance.
e. only works when looking down at water.
Feedback - Correct Answer -d. is the ability to distinguish between near
and far objects and judge their distance.
As an object moves closer to the eye,
Select one:
a.
the lens flattens.
b.
the eyes rotate medially.
c.
the ciliary muscles relax.
, d.
the diameter of the pupil increases.
e.
the eye blinks. - Correct Answer -b.
the eyes rotate medially.
The utricle and saccule are involved in
Select one:
a. static balance.
b. kinetic balance.
c. hearing low intensity sounds.
d. hearing high intensity sounds.
e. evaluating movements of the head. - Correct Answer -a. static balance.
Rhodopsin is found in the
Select one:
a. rods.
b. cones.
c. choroid.
d. pigmented retina.
e. amacrine cells. - Correct Answer -a. rods.
What ion(s) cause(s) depolarization in olfactory neurons?
Select one:
a. Na+
Practice Questions and Answers
Graded A+ |Latest 2024
Which of the following is NOT true of reactive astrocytosis?
Select one:
a. injury site is blocked off
b. scars limit regeneration
c. causes the spread of inflammation
d. reduces injury to surrounding tissue
Feedback - Correct Answer -c. causes the spread of inflammation
Which of the following is NOT true about astrocytes?
Select one:
a. They can wall off an injury site to prevent spread of inflammation.
b. They can prevent toxic substances from entering brain tissue.
c. They can release chemicals that promote formation of synapses.
d. They can aid in the regeneration of injured neurons. - Correct Answer -
d. They can aid in the regeneration of injured neurons.
Neurotransmitter is being released at a synapse. Which of the following
occurs last?
Select one:
a. Calcium ions enter the presynaptic terminal.
b. Synaptic vesicles release neurotransmitter by exocytosis.
c. An action potential is produced in the postsynaptic membrane.
,d. Neurotransmitter flows rapidly across the synaptic cleft.
e. Neurotransmitter binds with the receptor on the postsynaptic membrane.
- Correct Answer -c. An action potential is produced in the postsynaptic
membrane.
Depolarization of the nerve cell membrane occurs when there is a rapid
influx (inflow) of
Select one:
a. potassium ions.
b. chloride ions.
c. calcium ions.
d. sodium ions.
e. proteins. - Correct Answer -d. sodium ions.
In some cells, an afterpotential occurs because
Select one:
a. the sodium ions continue to enter the cell after depolarization is finished.
b. there is prolonged, elevated permeability to potassium during
repolarization.
c. the sodium-potassium pump is actively exchanging ions across the
membrane.
d. the extracellular Na+ ion concentration is reduced.
e. the permeability to sodium continues longer than necessary. - Correct
Answer -b. there is prolonged, elevated permeability to potassium during
repolarization.
The patellar or knee-jerk reflex is a classic example of
Select one:
,a. the Golgi tendon reflex.
b. the withdrawal reflex.
c. the stretch reflex
d. the crossed extensor reflex.
e. reciprocal innervation. - Correct Answer -c. the stretch reflex
Depth perception
Select one:
a. relies on monocular vision.
b. does not require cerebral interpretation.
c. requires the image to strike the retina of both eyes in exactly the same
way.
d. is the ability to distinguish between near and far objects and judge their
distance.
e. only works when looking down at water.
Feedback - Correct Answer -d. is the ability to distinguish between near
and far objects and judge their distance.
As an object moves closer to the eye,
Select one:
a.
the lens flattens.
b.
the eyes rotate medially.
c.
the ciliary muscles relax.
, d.
the diameter of the pupil increases.
e.
the eye blinks. - Correct Answer -b.
the eyes rotate medially.
The utricle and saccule are involved in
Select one:
a. static balance.
b. kinetic balance.
c. hearing low intensity sounds.
d. hearing high intensity sounds.
e. evaluating movements of the head. - Correct Answer -a. static balance.
Rhodopsin is found in the
Select one:
a. rods.
b. cones.
c. choroid.
d. pigmented retina.
e. amacrine cells. - Correct Answer -a. rods.
What ion(s) cause(s) depolarization in olfactory neurons?
Select one:
a. Na+
