Semester Test Notes for 3rd 9 weeks

Question 1

_____ are bundles of nerves that carry impulses away from the cell body of a neuron.

Answer 1

Axons

Question 2

_____ is the basic unit of structure and functions of the nervous system.

Answer 2

A neuron

Question 3

_____ are small spaces between neurons. ____, or electrochemical messages, are carried across synapses by neurotransmitters.

Answer 3

Synapses, Nerve impulses

Question 4

The 3 parts of a nerve cell are:

Answer 4

1. cell body
2. dendrites
3. an axon

Question 5

________ conduct impulses faster than in unmyelinated nerve fibers.

Answer 5

Myelinated nerve fibers

Question 6

_______ lie completely within the central nervous system.

Answer 6

Interneurons

Question 7

______ is the process by which an impulse from a single neuron may be amplified by spreading to other neurons.

Answer 7

Divergence

Question 8

_______ is the process that allows the coordination of incoming impulses that represent information from a variety of receptors.

Answer 8

Convergence

Question 9

One type of sensory function of the nervous system would be monitoring ______ like light, sound, and temperature.

Answer 9

Phenomena

Question 10

_______ controls the amount of neurotransmitter released at each synapse.

Answer 10

Calcium

Question 11

_____ contraction is controlled by acetylcholine.

Answer 11

Skeletal Muscle

Question 12

In the lungs, the surface tensions of fluid found in the _____ is decreased by surfactant, which prevents the alveoli from collapsing in on themselves. Also, the pressure within the pleural cavity is less than atmospheric pressure.

Answer 12

Alveoli

Question 13

_________ is the exchange of carbon dioixde and oxygen cells.

Answer 13

Internal respiration

Question 14

The pitch of the voice is controlled by changing the tension of the ___.

Answer 14

Vocal cords