FREE AND STUDY GAMES ABOUT CH 4 QUIZ EXAM

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FREE AND STUDY GAMES ABOUT CH 4 QUIZ EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -10 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: One of the major inhibitory neurotransmittors in the CNS is

Answer:

gamma amino butyric acid (GABA) Question 2: Exocytosis of neurotransmitter into the synaptic cleft is triggered by an influx of ______ in response to the arrival of an action potential in the axon terminal.

Answer:

Ca2

Question 3: When a nerve fiber is polarized, the concentration of

Answer:

sodium ions is higher on the outside of its membrane and potassium ions is higher on the inside.

Question 4: Ependymal cells

Answer:

Secrete cerebrospinal fluid in the ventricles of the brain

Question 5: A change in membrane potential in which the charge is becoming less negative than resting potential is called

Answer:

Depolarization Question 6: An infant's responses to stimuli are coarse and undifferentiated because its nerve fibers

Answer:

are not completely myelinated

Question 7: Which type of potential results from the opening of Na+ channels?

Answer:

Excitatory postsynaptic potential

Question 8: During the rising phase of an action potential,

Answer:

Voltage-gated Na+ channels open.Question 9: What is one of the three functions of the cerebrospinal fluid in the human body?

Answer:

Mechanical protection of the central nervous system Question 10: An action potential results in a change in the membrane potential of a nerve cell from resting potential if the potential changes to

Answer:

-55 mV