the autonomic nervous system

Question 1

ANS

Answer 1

Works with viscera (internal organs), providing them with motor and sensory information.

Question 2

what is the control centre for the ANS

Answer 2

• hypothalumus

Question 3

Efferent pathways

Answer 3

travel away from an area so is generally motor

Question 4

Afferent pathways

Answer 4

travel towards an area so is generally sensory.

Question 5

Sympathetic

Answer 5

stimulates the heart so it beats faster, more forcefully so increases blood flow around the body.

Question 6

Parasympathetic

Answer 6

has the opposite effect where is slows the heart down and reduces the force of contraction.

Question 7

ANS nerves (sympathetic phase)

Answer 7

The axon of neuron 1 that comes before the ganglion is called the preganglionic nerve fibre (uses ACT). The axon of neuron 2 that comes after the ganglion is called the postganglionic nerve fibre (uses noradreanline)

Question 8

ANS nerves (parasympathetic phase)

Answer 8

Preganglionic fibres come from neurons in the brain and sacral spinal cord (craniosacral outflow).
- The preganglionic and postganglionic fibres synapse at a ganglion closer to the target organ (not at
the sympathetic chain of ganglia).
- Postganglionic nerve fibres supply parts of the eye, salivary glands, heart and lungs.
- all use ACT