Chapter 11: Introduction to Nervous system and tissue

Question 1

What are the organs of the CNS?

Answer 1

brain and spinal cord

Question 2

What are the organs of the PNS?

Answer 2

nerves

Question 3

What is the sensory function?

Answer 3

involves gathering information about the internal and external environments of the body.

Question 4

What is the integrative function?

Answer 4

analyze and interpret the detected sensory stimuli and determine an appropriate response.

Question 5

What is motor function?

Answer 5

the actions performed in response to integration.

Question 6

Somatic sensory division

Answer 6

Of the PNS sensory division–carries signals from muscles, bones, joints and skin. Transmits signals from organs of vision, hearing, taste, smell and balance (special sensory neurons)

Question 7

Visceral sensory division

Answer 7

Part of the PNS sensory division–neurons that transmit signals from organs such as the heart, lungs, stomach, intestines, kidneys and urinary bladder.

Question 8

How does the somatic motor division of the PNS differ from the ANS?

Answer 8

• somatic motor division transmit signals to skeletal muscles under conscious control (voluntary motor division)
• autonomic nervous system carry signals to thoracic and abdominal area (involuntary motor division)

Question 9

neurons

Answer 9

are the excitable cell type responsible for sending and receiving signals in the form of action potentials.

Question 10

cell body

Answer 10

where the majority of the biosynthetic processes of the cell occur.

Question 11

dendrites

Answer 11

carry electrical signals to the cell body

Question 12

axon

Answer 12

the long “arm” that carries electrical signals away from the cell body.

Question 13

sensory (afferent) neurons

Answer 13

carry signals toward the CSN

• detect stimuli
• transmits it to cell bodies of PNS
• then down their axons to the brain or spinal cord

Question 14

interneurons

Answer 14

relay messages within the CNS between sensory and motor neurons, multipolar in structure.

Question 15

motor (efferent) neurons

Answer 15

carry stimuli away from their cell bodies in the CNS to muscles and glands, multipolar in structure.

Question 16

nuclei

Answer 16

clusters of cell bodies in the CNS

Question 17

ganglia

Answer 17

clusters of cell bodies in the PNS

Question 18

neuroglial cells

Answer 18

maintain the environment around neurons, protect neurons, assist in proper functioning of neurons.