Question 1

Presynaptic vesicles are located in the ________.

Accepted Answer

A) axon hillocks 
B) neurofibrils 
C) axon terminals 
D) telodendria C

Question 2

-The cell body is marked by letter ________.

Accepted Answer

A) C 
B) D 
C) E 
D) F C

Question 3

Both astrocytes and microglial cells have cytoplasm extensions. Explain how you can distinguish the two types of cells microscopically.

Accepted Answer

A) Astrocytes are associated with capillaries. 
B) Microglial cells are found in the peripheral nervous system. 
C) Astrocytes cover the cell bodies of unipolar neurons. 
D) Microglial cells myelinate the axons of motor neurons. A

Question 4

-Letter e is marking the ________.

Accepted Answer

A) perineurium 
B) endoneurium 
C) epineurium 
D) fascicle

Question 5

If you are examining a Node of Ranvier, what part of the neuron are you immediately observing?

Accepted Answer

A) Axolemma of an axon 
B) Cell body 
C) Axon 
D) Schwann cells.

Question 6

The ________ is a gateway for most sensory impulses traveling to the cerebral cortex.

Accepted Answer

A) sensory neuron 
B) visual association area 
C) effector 
D) thalamus

Question 7

-Letter b is marking the ________.

Accepted Answer

A) fascicle 
B) neurofibrils 
C) node of Ranvier 
D) telodendria

Question 8

If a neurotransmitter fails to bind to receptors on the motor end plate, which of the following events would be the first one to fail to occur?

Accepted Answer

A) Ligand-gated sodium channels would not open. 
B) Calcium ions would not enter the axon terminal. 
C) Sodium ions would not enter the postsynaptic neuron. 
D) A postsynaptic action potential would not be triggered.

Question 9

-Which labeled structure marks the axon terminals?

Accepted Answer

A) J 
B) A 
C) D 
D) G

Question 10

What neurotransmitter is released at the neuromuscular junction?

Accepted Answer

A) Serotonin 
B) Acetylcholine 
C) Epinephrine 
D) Calcium

Question 11

Which two factors or structures increase the speed of nerve impulse conduction?

Accepted Answer

A) Graded conduction and saltatory conduction 
B) Myelin sheath and location of axon hillock 
C) Myelin sheath and graded conduction 
D) Myelin sheath and saltatory conduction

Question 12

Which of the following will you find in a dorsal root ganglion?

Accepted Answer

A) Satellite cells 
B) Schwann cells 
C) Multipolar neuron cell bodies 
D) Bipolar neuron cell bodies

Question 13

-Which labeled structure marks the neurofibrils?

Accepted Answer

A) B 
B) C 
C) A 
D) D

Question 14

A neuroglial cell ________.

Accepted Answer

A) supports neurons 
B) conducts electrical impulses along axons 
C) receives electrical impulses from sensory organs 
D) conducts electrical impulses between neurons

Question 15

Following the components of a neural pathway, which event would occur first?

Accepted Answer

A) Transmission of the electrical impulse to the effector organ 
B) Transduction of the stimulus into an electrical impulse 
C) Transduction of the electrical impulse from the thalamus to precentral gyrus 
D) Transmission of the electrical impulse to the thalamus

Question 16

-Which labeled structure marks the nodes of Ranvier?

Accepted Answer

A) J 
B) K 
C) I 
D) H

Question 17

Predict what you would find after removing the epineurium of a peripheral nerve.

Accepted Answer

A) Multiple fascicles each covered by an perineurium 
B) Multiple fascicles covered by an endoneurium 
C) Multiple axons each covered by an endoneurium. 
D) Schwann cells

Question 18

A chemical messenger is also called a ________.

Accepted Answer

A) calcium channel 
B) receptor 
C) neurotransmitter 
D) myelin sheath

Question 19

Which statement is the most likely if drug X has a stimulatory effect at a synapse?

Accepted Answer

A) Drug X opens chloride channels on the postsynaptic membrane. 
B) Drug X opens potassium channels on the postsynaptic membrane 
C) Drug X opens sodium channels on the postsynaptic membrane. 
D) Drug X causes hyperpoloarization of the postsynaptic membrane.

Question 20

-Which labeled structure marks the axon hillock?

Accepted Answer

A) F 
B) H 
C) E 
D) G

Exam 14: Introduction to the Nervous System