Week 3 Lecture Quiz
Due Nov 13 at 11:59pm Points 40 Questions 40 Available after Nov 7 at 12am
Time Limit 60 Minutes
Instructions
You will have 60 minutes to complete this 40-question quiz.
Attempt History
Attempt Time Score
LATEST Attempt 1 18 minutes 39 out of 40
Submitted Nov 12 at 6:44pm
Question 1 pts
Myelin is formed by
oligodendrocytes only.
Correct! Schwann cells and oligodendrocytes.
Schwann cells only.
axons only.
Question 2 pts
Which of the following statment is FALSE regarding the Sympathetic Nervous Sytem?
Correct! both the preganglionic and postganglionic fibers release acetlcholine as the neurotransmitter.
the receptors within this system are collectively referred to as the "adrenergic" receptors.
it is responsible for the "fight or flight" response.
the ganglions are located within the paravertebral chains.
Question 3 pts
Which of the following increase the speed of an action potential?
Decrease the diameter of the axon.
Correct! Increase in botth the diameter of the axon and myelination.
Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
, decrease in the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
Question 4 pts
The ion necessary to initiate the release of acetylcholine into the synaptic cleft is
chloride.
sodium.
Correct! calcium.
potassium.
zinc.
Question 5 pts
The inhibitory neurotransmitters of the CNS act by opening ________ channels.
only Na+
only Ca2+
Na+ and K+
Correct! only Cl-
only K+
Question 6 pts
Inhibitory neurotransmitters
increase membrane permeability to sodium ions.
Correct! result in hyperpolarizing type of graded potential.
decrease calcium ion exit from cells.
decrease potassium ion exit from cells.
result in depolarizing type of graded potential.
Question 7 pts
Graded potentials may
Due Nov 13 at 11:59pm Points 40 Questions 40 Available after Nov 7 at 12am
Time Limit 60 Minutes
Instructions
You will have 60 minutes to complete this 40-question quiz.
Attempt History
Attempt Time Score
LATEST Attempt 1 18 minutes 39 out of 40
Submitted Nov 12 at 6:44pm
Question 1 pts
Myelin is formed by
oligodendrocytes only.
Correct! Schwann cells and oligodendrocytes.
Schwann cells only.
axons only.
Question 2 pts
Which of the following statment is FALSE regarding the Sympathetic Nervous Sytem?
Correct! both the preganglionic and postganglionic fibers release acetlcholine as the neurotransmitter.
the receptors within this system are collectively referred to as the "adrenergic" receptors.
it is responsible for the "fight or flight" response.
the ganglions are located within the paravertebral chains.
Question 3 pts
Which of the following increase the speed of an action potential?
Decrease the diameter of the axon.
Correct! Increase in botth the diameter of the axon and myelination.
Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
, decrease in the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
Question 4 pts
The ion necessary to initiate the release of acetylcholine into the synaptic cleft is
chloride.
sodium.
Correct! calcium.
potassium.
zinc.
Question 5 pts
The inhibitory neurotransmitters of the CNS act by opening ________ channels.
only Na+
only Ca2+
Na+ and K+
Correct! only Cl-
only K+
Question 6 pts
Inhibitory neurotransmitters
increase membrane permeability to sodium ions.
Correct! result in hyperpolarizing type of graded potential.
decrease calcium ion exit from cells.
decrease potassium ion exit from cells.
result in depolarizing type of graded potential.
Question 7 pts
Graded potentials may
