((L.E #2)) Somatic Nervous System vs. ANS

Question 1

Somatic N.S deals with…
- characteristics

Answer 1

the Skeletal System
- voluntary (ex; biceps brachii, gluteus maximus)
- always stimulatory (meaning contraction of muscle)
- 1 neuron from brain or spinal cord TO the skeletal muscle
- axons are heavily myelinated = rapid impulse conduction

Question 2

Autonomic N.S deals with
- characteristics

Answer 2

the “motor” to…
1. Cardiac Muscle (heart)
2. Smooth Muscle (GI tract; intestines, stomach, arteries, bronchial tubes)
3. Glands (sweat glands, salivary glands

– is INVOLUNTARY
– 2 neurons in sequence
– Effects can either be stimulatory or inhibitory

Question 3

Autonomic N.S// Two Neuron Chain from CNS to effector organs

Answer 3

1. Pre ganglionic neuron: before ganglion + secretes ACH
2. Post ganglionic: after ganglion
   - sympathetic post ganglionic = secrete NE (norepinephrine) and are NOT myelinated
   - parasympathetic post ganglionic = secrete ACH and are NOT myelinated

Question 4

Somatic Nervous System lacks what?

Answer 4

Ganglia