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Flashcards in Ch 10 Deck (37)
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1

The parasympathetic division of the autonomic nervous system stimulates the body's vegetative activities such as digestion, urination, and defecation

True

2

Over 60% of all brain cells are neurons

False

3

The first nerve cell receiving an impulse directly from a receptor is called a motor or efferent neuron

False

4

The action potential moves in both directions down a nerve fiber

False

5

An unmyelinated nerve fiber conducts an impulse over its entire length with a slower rate of conduction than that of a myelinated fiber.

True

6

The ____ system is the body's control center and communication network.

Nervous

7

The _____ nervous system consists of the brain and spinal cord.

Central

8

Neurons that convey information from the brain and spinal cord to muscles and glands are called ___ neurons.

Efferent or Motor

9

The parasympathetic division of the autonomic nervous system uses the neurotransmitter ____ at nerve endings

acetylcholine

10

A bundle of nerve cells or fibers is called a ____

Nerve

11

Star-shaped cells that form a supporting network in the brain and spinal cord are called ____.

Astrocytes

12

Cells that line the fluid-filled ventricles of the brain, some of which produce cerebrospinal fluid, are called____

ependymal cells

13

Myelin sheaths surrounding nerve fibers in the peripheral nervous system are produced by _____

Schwann cells

14

Neurons that have several dendrites and one axon are called ____ neurons

Multipolar

15

Most sensory neurons are ____ neurons

Unipolar

16

The final nerve cell that receives the impulse an brings about the reaction to the original stimulus is called the motor or ____ neuron.

Efferent

17

Sodium-Potassium pumps restore the resting membrane potential following an action potential, a process known as ____.

Repolarization

18

Terminal branches of an axon are anchored close to the ends of the dendrites of another neuron at regions called ____

Synapses

19

The chemicals that transmit signals across the synapse are called

neurotransmitters

20

Most synapses in our bodies use the ____ neurotransmitter

acetylcholine

21

Areas of the nervous system known as ____ consist of nerve cells bodies and dendrites

Gray matter

22

A bundle of fibers located outside the central nervous system is called a

nerve

23

Descending tracts of the central nervous system that conduct impulses down the spinal cord are concerned with ____ functions

Motor

24

The spinal cord is a continuation of the ____

medulla oblngata

25

Nerve cell bodies found outside the central nervous system are called____

Ganglia

26

A bundle of fibers inside the central nervous system is called a

Tract

27

The outermost spinal meinx is called the

Dura Mater

28

The space that seperates the mininges from the vertebrae is called the ___ space

Epidural

29

Valium is an example of a

Depressant

30

The ____ act like the male sex hormones

Anabolic steriods