Ch 10

Question 1

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

Answer 1

True

Question 2

Over 60% of all brain cells are neurons

Answer 2

False

Question 3

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

Answer 3

False

Question 4

The action potential moves in both directions down a nerve fiber

Answer 4

False

Question 5

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

Answer 5

True

Question 6

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

Answer 6

Nervous

Question 7

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

Answer 7

Central

Question 8

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

Answer 8

Efferent or Motor

Question 9

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

Answer 9

acetylcholine

Question 10

A bundle of nerve cells or fibers is called a ____

Answer 10

Nerve

Question 11

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

Answer 11

Astrocytes

Question 12

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

Answer 12

ependymal cells

Question 13

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

Answer 13

Schwann cells

Question 14

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

Answer 14

Multipolar

Question 15

Most sensory neurons are ____ neurons

Answer 15

Unipolar

Question 16

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

Answer 16

Efferent

Question 17

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

Answer 17

Repolarization

Question 18

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

Answer 18

Synapses

Question 19

The chemicals that transmit signals across the synapse are called

Answer 19

neurotransmitters

Question 20

Most synapses in our bodies use the ____ neurotransmitter

Answer 20

acetylcholine

Question 21

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

Answer 21

Gray matter

Question 22

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

Answer 22

nerve

Question 23

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

Answer 23

Motor

Question 24

The spinal cord is a continuation of the ____

Answer 24

medulla oblngata

Question 25

Nerve cell bodies found outside the central nervous system are called____

Answer 25

Ganglia

Question 26

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

Answer 26

Tract

Question 27

The outermost spinal meinx is called the

Answer 27

Dura Mater

Question 28

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

Answer 28

Epidural

Question 29

Valium is an example of a

Answer 29

Depressant

Question 30

The ____ act like the male sex hormones

Answer 30

Anabolic steriods

Question 31

Ascending tracts of the spinal cord carry ____ information from the body parts to the brain

Answer 31

Sensory

Question 32

All the spinal nerves are ____ nerves

Answer 32

Mixed

Question 33

There are ____ pairs of cervical nerves

Answer 33

8

Question 34

The ____ division of the autonomic nervous system stimulates and speeds up certain bodily activities

Answer 34

Sympathetic

Question 35

Nerve cells are known as ____ transmit nerve impulses in the form of electrochemical changes

Answer 35

Neurons

Question 36

Neurons that convey information from receptors in the periphery of the body to the brain and spinal cord are known as _______ neurons

Answer 36

Afferent Peripheral

Question 37

The nerve fibers on the nerve cell that receive signals are called ____

Answer 37

Dendrites