Chapter 9 The Autonomic Nervous System

Question 1

Characteristics of Somatic Nervous System

Answer 1

Relates to the body
Voluntary
Movement
Muscle cell excitation

Question 2

Characteristics of Autonomic Nervous System

Answer 2

Involuntary/unconscious
Regulates cardiac, smooth and glands
Excitation or inhibitory
Sympathetic and Parasympathetic

Question 3

What is the number of neurons from the CNS to effector in both the Somatic and Autonomic system

Answer 3

Somatic = 1
Autonomic = 2

Question 4

Name the two neuron organisations in the autonomic system

Answer 4

Preganglionic neurons

Postganglionic neurons

Question 5

What do Preganlionic neurons have and where

Answer 5

Cell bodies in the CNS

Question 6

What do Postganlionic neurons have and where

Answer 6

Cell bodies in the autonomic ganglia

Question 7

List the Sympathetic division

Answer 7

NE released from postganglionic neuron
E released from adrenal medulla
ACh released from preganglionic neuron

Causes:
Increased...
Heart rate
Blood glucose concentration
Blood flow to skeletal muscles
Pupil Dilation

Question 8

List the Parasympathetic division

Answer 8

ACh released from preganglionic neurons and most postganglionic neurons
Opposite effects:
Slowed heart rate
Dilation of visceral organs blood vessels
Increased digestive activity