Question 1
2 / 2 pts
The neuron pictured, below, is best described as:
Correct!
Bipolar
It has two extensions from the central cell
... [Show More] body.Multipolar
Unipolar
Pseudounipolar
Question 2
10 / 10 pts
Name and describe what is occurring in the neuron cell membrane in section 4 of the
diagram. Include the charge of the membrane during this phase.
Your Answer:• Afterpolarization (Hyperpolarization) Potassium gates are slow to
close and there is an undershoot of the potential.
• The charge drops below -70mV and then returns to -70mV once at
resting state again.
Question 3
4 / 4 pts
Where is the integration center of a reflex located?
CNS (central nervous system)
Question 4
4 / 4 pts
What is true about the flexor withdrawal reflex?
A. It does not involve interneurons.
B. It involves excitatory interneurons.
C. It involves inhibitory interneurons.
D. The effect of the reflex is to create a co-contraction of two muscles
E. A&D
Correct!
F. B&C
Question 5
10 / 10 pts
Label the nerves (A-C) in the figure below:
A: _________________
B: _________________
C: _________________A- Lateral femoral cutaneousB- Femoral nerve
C- Saphenous
Question 6
2 / 2 pts
Which of the following is most likely a symptom of ALS?
Correct!
Impaired ability to swallow
Decreased sensation in the hands
Shrinkage of cerebral cortex
Increased size of brain ventricles
All the above
Question 7
4 / 4 pts
What is the purpose of the blood-brain barrier? Describe its maintenance from a
cellular level.
The blood-brain barrier is a diffusion barrier which prevents most particles from
entering the central nervous system tissue, keeping the brain and spinal cord
separate from general blood circulation. The blood-brain barrier is formed by the
relatively impermeable brain capillaries, due to the glial cells astrocytes.
Maintenance of the blood-brain-barrier is important to provide a stable chemical
environment for the nervous system.
Question 8
2 / 2 pts
A patient damaged the radial nerve. What action is most likely limited?
Elbow flexionHip extension
Wrist flexion
Correct!
Wrist extension
Question 9
2 / 2 pts
What is muscle tone and how is it maintained?
Muscle tone is the degree at which muscles remain partially contracted while at
rest. Muscle tone is continuously monitored and maintained by the cerebellum to
keep bones and joints in place.
Question 10
5 / 5 pts
A patient had a CVA in the area indicated by the red x in the figure, below. What type
of blindness is the patient most likely to incur? Explain your reasoning.
A. Left eye blindness
B. Right eye blindness
C. Bilateral left visual field blindness
D. Bilateral right visual field blindness. [Show Less]