Autonomic Physiology 2 Flashcards

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

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2
Q

What muscle in the eye is effected by alpha1 receptors?

A

Radial muscle of iris

Muscle contracts and dilates pupil

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3
Q

How do muscarinic receptors affect the ciliary muscle?

A

Cause it to contract and focus close up

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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

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5
Q

What does alpha1 receptors always do?

A

Causes contraction of smooth muscle

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6
Q

what do beta2 receptors always do?

A

Cause relaxation of smooth muscle

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7
Q

What receptors are always excitatory?

A

beta1, such as increasing heartrate

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8
Q

SEE HAND DRAWN TABLE FOR EXAMPLES TO LEARN

A

YOU NEED TO LEARN THEM

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9
Q

What controls the autonomic nervous system?

A

Autonomic reflexes

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

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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)

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11
Q

Single innervation?

A

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

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12
Q

Whats tone?

A

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

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13
Q

Dual innervation

A

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

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