Chapter 12: Nervous System

Question 1

2 divisions of the nervous system

Answer 1

Central and peripheral

Question 2

Central nervous system

Answer 2

Brain and spinal cord

Question 3

Peripheral nervous system

Answer 3

Nerves and ganglia

Question 4

____ are clusters of nerve cell bodies in the ____ nervous system

Answer 4

Ganglia; peripheral

Question 5

T or F: sensory and motor components are divided into somatic/visceral sensory and somatic/visceral motor

Answer 5

True

Question 6

Pain, touch, vibration pressure, and temperate are basic ____ sensory input

Answer 6

Somatic

Question 7

2 types of nervous tissue cells

Answer 7

Neurons and supporting cells

Question 8

Neurons and supporting cells are collectively called ____

Answer 8

Neuroglia

- Neurons are the fundamental structural and functional unit in the nervous system

Question 9

T or F: Human nervous system contains 100 million neurons

Answer 9

False; 100 billions

Question 10

Neurons are excitable cells and the source of ___

Answer 10

Nerve impulses or action potential

Question 11

Central nervous system cells

Answer 11

1. Astrocytes
2. Microglial
3. Ependymal
4. Oligodendrocytes

Question 12

Astrocytes

Answer 12

1. Associate astrocytes with the blood brain barrier

2. Regulate neuronal activity and growth

Question 13

Microglial

Answer 13

Tissue macrophages in the CNS

Question 14

Ependymal

Answer 14

Form the lining of brain ventricles and produce cerebrospinal fluid

Question 15

Oligodendrocytes

Answer 15

Produce myelin sheath in the CNS

Question 16

Peripheral nervous system cells

Answer 16

Schwann cell

Satellite cell

Question 17

Schwann cell

Answer 17

Produce myelin sheath in the PNS

Question 18

Satellite cell

Answer 18

surround neuron cell bodies within ganglia

Question 19

Myelinated axons in PNS

Answer 19

Formed by schwann cells

Question 20

Non-myelinated axons in PNS

Answer 20

Lack myelin sheath

Question 21

Gray matter is composed of primarily of ____ and white matter represents ______

Answer 21

Nerve cell bodies; myelinated axons

Question 22

Neuron

Answer 22

a nerve cell

Question 23

Nerve fiber

Answer 23

Long axon

Question 24

Nerve

Answer 24

collection if axons in the pns

Question 25

5 components: Reflex arc

Answer 25

1. Receptor
2. Sensor neuron
3. Integration center
4. Motor neuron
   5 Effector

Question 26

5 components of of reflex arc

Answer 26

1. Receptor
2. Sensory neuron
3. Interneuron (integrating connection)
4. Motor neuron
5. Effector (muscle)

Question 27

Reflexes can be classified according to the _____ or synapses

Answer 27

Number

- Monosynaptic; polysynaptic

Question 28

T or F: Reflexes are integrated into CNS for processing and interpretation

Answer 28

True

- Localize and feel pain

Question 29

____ have neuronal stem cells only in isolated regions of the brain severely limiting the capacity to regenerate neurons and recover from ____ or _____ injury

Answer 29

Adults; brain or spinal cord injury

Question 30

Proprioception

Answer 30

sensing one’s own body

- detects amount of stretch in muscles, tendons

Question 31

Demonstrate: Proprioception

Answer 31

flex and extend your fingers without looking you will be able to tell which fingers are moving