Chapter 16 Part 1

Question 1

Central Nervous system consists of:

Answer 1

brain and spinal cord

Question 2

Peripheral Nervous system consists of:

Answer 2

cranial and spinal nerves

Question 3

Subdiv. of Autonomic Nervous system:

Answer 3

Sympathetic and Parasympathetic

Question 4

Sympathetic-prepares body for

Answer 4

strenuous activities; fight or flight

Question 5

Parasympathetic-restores body to

Answer 5

restful state (rest/digest)

Question 6

(PNS) Spinal reflexes-circuit of neurons from a

Answer 6

receptor to spinal cord/out to effector

Question 7

PNS: most somatic reflex arcs include..

Answer 7

three neurons; visceral reflex arcs more complex

Question 8

PNS: Afferent (sensory) nerves-carry info from

Answer 8

tissues TO CNS

Question 9

PNS: Efferent (motor) nerves-carry info

Answer 9

AWAY from CNS to effectors

Question 10

Somatic nerves-serve…

Answer 10

skeletal muscle, skin (voluntary movement)

Question 11

Visceral nerves-serve…

Answer 11

involuntary muscles, glands to ANS

Question 12

Reflex Arc in order (5)

Answer 12

Receptor
Sensory neuron
Integration center
Motor neuron
Effector

Question 13

Gaps betw. junct. of neurons/neurtransm. make up…

Answer 13

synapses

Question 14

Neurotransm. - chem. released into synapses to stimulate..

Answer 14

production of electrical impulse

Question 15

(white matter) Myelinated nerves-

Answer 15

axons wrapped with myelin sheath

Question 16

(grey matter) Unmyelinated nerves-

Answer 16

w/o sheaths

Question 17

Spinal cord-extends from medulla; protected by

Answer 17

vertebral column

Question 18

Types of Cells:

Answer 18

Neurons/Neuroglia

Question 19

Neurons-long distance transm. of elect. stimuli. (3)Consist of:

Answer 19

Cell body, Dendrites (incoming path), Axon (outgoing path)

Question 20

Neuroglia-support, nourish, insulate neurons. Ex: Schwann cells-

Answer 20

insulate axons of neurons w/myelin

Question 21

Brainstem: connects brain to spinal cord; (4) parts-

Answer 21

Midbrain, Diencephalon, pons, medulla

Question 22

Hindbrain- medulla: regulates..

Answer 22

involuntary actions, breathing, heart rhythm, reflexes (swallow., cough. vomit.)

Question 23

Hindbrain: Cerebellum (little brain)-maintains posture/ balance and..

Answer 23

fine motor movem., distance, sense of time, emotions, decision making, sight, speech

Question 24

Hindbrain: Pons-relays sensory info to

Answer 24

cerebellum; regulates breathing/sleep cycles