Autonomic Physiology 2 Flashcards Preview

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Flashcards in Autonomic Physiology 2 Deck (13)
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1
Q

What muscle in the eye is effected by beta2 receptors?

A

The ciliary muscle around lens

Relaxes muscle and eye focuses far away

2
Q

What muscle in the eye is effected by alpha1 receptors?

A

Radial muscle of iris

Muscle contracts and dilates pupil

3
Q

How do muscarinic receptors affect the ciliary muscle?

A

Cause it to contract and focus close up

4
Q

How is the eye’s sphincter muscle affected by by muscarinic receptors?

A

Muscarinic receptors cause the sphincter muscle to contract and shrink the pupil

5
Q

What does alpha1 receptors always do?

A

Causes contraction of smooth muscle

6
Q

what do beta2 receptors always do?

A

Cause relaxation of smooth muscle

7
Q

What receptors are always excitatory?

A

beta1, such as increasing heartrate

8
Q

SEE HAND DRAWN TABLE FOR EXAMPLES TO LEARN

A

YOU NEED TO LEARN THEM

9
Q

What controls the autonomic nervous system?

A

Autonomic reflexes

Centrol control from the hypothalamus (controls both nervous sytems and endocrine activity)

10
Q

What are the 3 main complications of the ANS?

A

Some neruones relase NANC transmitters
Some release co-transmitter
Some just break rules (e.g. sympathetic fibres innervating sweat glands using Ach)

11
Q

Single innervation?

A

Where only one of the sympathetic/parasympathetic systems affects the tissue (energy stores only altered by sympathetic systems)

12
Q

Whats tone?

A

The constant level of activity in a single innervation system (control of the system is done by altering tone)

13
Q

Dual innervation

A

System is affected by both para and sympathetic systems (usually oppositely)