Chapter 29 - Neural Control

Question 1

________ relay messages from the brain and spinal cord to muscles and glands.

a. Motor neurons
b. Sensory neurons
c. Interneurons
d. Neuroglia

Answer 1

a. Motor neurons

Question 2

When a neuron is at rest, _________.

a. it is at threshold potential
b. gated sodium channels are open
c. it holds less sodium then the interstitial fluid
d. both a and c

Answer 2

b. gated sodium channels are open

Question 3

Action potentials occur when ______.

a. potassium gates close
b. a stimulus pushes membrane potential to threshold
c. sodium-potassium pumps kick into action
d. neurotransmitter is reabsorbed

Answer 3

b. a stimulus pushes membrane potential to threshold

Question 4

Neurotransmitters are released by _________.

a. axon terminals
b. the cell body
c. dendrites
d. the myelin sheath

Answer 4

a. axon terminals

Question 5

Myelin around peripheral nerves is made by _________.

a. Schwann cells
b. motor neurons
c. sensory neurons
d. interneurons

Answer 5

a. Schwann cells

Question 6

Skeletal muscles are controlled by _________.

a. sympathetic signals
b. parasympathetic signals
c. somatic nerves
d. both a and b

Answer 6

c. somatic nerves

Question 7

When you sit quietly on the couch and read, output from the _________ system prevails.

a. sympathetic
b. parasympathetic
c. Both prevail
d. Neither prevails

Answer 7

b. parasympathetic

Question 8

Skeletal muscles contract in response to _______.

a. acetylcholine (ACh)
b. dopamine
c. serotonin
d. endorphins

Answer 8

a. acetylcholine (ACh)

Question 9

The cerebrum is part of the _______.

a. forebrain
b. midbrain
c. hindbrain
d. brain stem

Answer 9

a. forebrain

Question 10

Morphine mimics natural painkillers called ____________.

Answer 10

endorphins

Question 11

Parkinson’s disease involves low levels of ______________.

a. acetylcholine (ACh)
b. dopamine
c. serotonin
d. endorphins

Answer 11

b. dopamine

Question 12

Myelinated axons make up the ________ matter of the brain and spinal cord.

Answer 12

white

Question 13

Match the terms with their descriptions.

\_\_\_ muscle spindle
\_\_\_ neurotransmitter
\_\_\_ limbic System
\_\_\_ corpus callosum 
\_\_\_ cerebral cortex
\_\_\_ cerebellum
\_\_\_ neuroglia 
\_\_\_ ganglion
\_\_\_ blood-brain Barrier
\_\_\_ meninges

a. coordinates motor activity
b. connects the hemispheres
c. protects brain and spinal cord from some toxins
d. type of signaling molecule
e. support team for neurons
f. wrap brain and spinal cord
g. roles in emotion, memory
h. most complex integration
i. cluster of neuron cell bodies
j. stretch-sensitive receptor

Answer 13

Match the terms with their descriptions.

(f) muscle spindle
(d) neurotransmitter
(g) limbic System
(b) corpus callosum
(h) cerebral cortex
(e) cerebellum
(i) neuroglia
(c) ganglion
(f) blood-brain Barrier
(a) meninges

a. coordinates motor activity
b. connects the hemispheres
c. protects brain and spinal cord from some toxins
d. type of signaling molecule
e. support team for neurons
f. wrap brain and spinal cord
g. roles in emotion, memory
h. most complex integration
i. cluster of neuron cell bodies
j. stretch-sensitive receptor