Chaoter 12: Overview Of The Nervou System

Question 1

CNS

Answer 1

Brain & spinal cord

Question 2

PNS

Answer 2

All nervous tissue outside of the CNS

Question 3

Nerve

Answer 3

Bundle of hundreds to thousands of axons plus connective tissue & blood vessels

Question 4

Cranial nerves

Answer 4

Emerge from the bran - 12 pairs

Question 5

Spinal nerves

Answer 5

Emerge from spinal cord - 31 pairs

Question 6

Sensory receptor

Answer 6

Structure of the NS that monitors=ors changes in the external or internal environment (tough receptors in skin, photoreceptors in eyes)

Question 7

SNS

Answer 7

Converts output from the CNS to skeletal muscles only (voluntary)

Question 8

ANS

Answer 8

conveys output from the CNS to smooth muscles, cardiac muscles, & glands (involuntary)

Question 9

Sensory function

Answer 9

Detect internal stimuli - increase in blood pressure or external - raindrop on arm - info then carried to the brain & spinal cord through cranial & spinal nerves

Question 10

Integrative function

Answer 10

NS processes sensory info by analyzing it & making decisions

Question 11

Motor function

Answer 11

Once info is integrated the NS may elect an appropriate motor response by activating effectors (muscles & glands) through cranial & spainl nerves