12.1

Question 1

CNS

Answer 1

Brain and spine

Question 2

PNS

Answer 2

All her tissue outside of CNS
Comprising nerves and ganglia that facilitate communication from CNS to rest of body
Divided into sensory (afferent) and motor (efferent) divisions

Question 3

Primary steps of nervous system

Answer 3

1. Sensing change
2. Processing information
3. Issuing commands to effectors

Question 4

Motor division of PNS

Answer 4

Transmits signals from CNS to effectors

Question 5

Somatic motor division

Answer 5

Controls voluntary movements by sending signals to skeletal muscles

Question 6

Automatic nervous system

Answer 6

-regulates involuntary functions
-divided into sympathetic and parasympathetic divisions

Question 7

Sympathetic division

Answer 7

Fight or flight response

Question 8

Parasympathetic division

Answer 8

Rest and digest activities
Slows heart rate and stimulates digestion functions
-maintaining homeostasis

Question 9

Endocrine system

Answer 9

Communicates by means of chemical messengers (hormones) secreted into the blood

Question 10

Nerve

Answer 10

Bundle of nerve fibers (axons) wrapped in fibrous connective tissue

Question 11

Ganglion

Answer 11

Knot like swelling in a nerve where neuron cell bodies are concentrated
Located outside of CNS