Week Three

Question 1

What is the effect of the Sympathetic Nervous System (SNS)?

Answer 1

• Mobilisation of body resources
• Fight or flight
• General body-wide increase in activity

Question 2

What is the effect of the Parasympathetic Nervous System (PSNS)?

Answer 2

• Conservation of body resources
• Rest and digest
• Specific actions to specific organs (eg bladder, glands)

Question 3

What are GVE fibres?

Answer 3

General Visceral Efferent fibres

Question 4

What is the function of the GVE fibres?

Answer 4

Providing motor innervation to:
Smooth muscle
Cardiac muscle
Glands

Question 5

What are GVA fibres?

Answer 5

General Visceral Afferent fibres

Question 6

What is the function of the GVA fibres?

Answer 6

Conduct sensory impulses (pain/reflex) from:
Viscera
Glands
Blood vessels
To CNS

Question 7

ANS efferents: Smooth muscle by SNS:

Answer 7

• GIT
• Blood vessels
• Piloerectors
• Iris for dilation

Question 8

ANS efferents: Smooth muscle by PSNS:

Answer 8

• GIT
• Iris for constriction
• Lens ciliary muscle

Question 9

ANS efferents: Cardiac muscle by SNS:

Answer 9

Whole heart

Question 10

ANS efferents: Cardiac muscle by PSNS:

Answer 10

SA and AV nodes

Question 11

ANS efferents: Glandular tissue

Answer 11

Secretions quality and quantity
Adrenal
Salivary
Accessory sex organs

Question 12

What is the general arrangement for GVE fibres?

Answer 12

2-neurone chain of Preganglionic neuron & postganglionic neuron