Peripheral Nervous System

Question 1

Function of Somatic System

Answer 1

Sense and respond to external environment (voluntary and reflex arc)

Question 2

Function of Autonomic Nervous system

Answer 2

Senses and responds to internal environment (involuntary)

Question 3

What controls ANS

Answer 3

Hypothalamus and medulla oblongata

Question 4

ANS- Sympathetic vs Parasympathetic

Answer 4

S- Preps for stress (fight or flight)
•Thoracic to lumber of spine
• Post ganglionic nerve near spinal cord releases norepinephrine as neuroTM which increase force of muscle contractions

PS- Brings back to homeostasis after stress (rest and digest)
• Cervical to caurdral part of spine
• Post ganglions near organs released acetylcholine as NeuroTM

Question 5

Compare and Contrast the effect of sympathetic and parasympathetic nerves on the body

Answer 5

Sympathetic:
Heart Rate- increases
Peristalsis- decreased
Glucose- gets released from liver
Pupils- Dilated inhibiting tears
Bladder Spincter- constricts
Blood flow to skin- increases
Adrenal Gland- release ephinphrine

ParaSympathetic:
Heart Rate- decrease
Peristalsis- increases
Glucoses- stored in liver
Pupils- constricts
Bladder Spincter- relaxes
Blood flow to skin- decreases
Adrenal Gland- no effect

Question 6

Stimulant drugs

Answer 6

Mimics stimulation provided by sympathetic nervous system