5 Autonomic Nervous System Flashcards

1
Q

The sympathetic nervous system’s thoracolumbar division has ___-synaptic fibers leave the spine at level of thoracic vertebrae and upper lumbar.

It synapses in the ____________ chain (short pre-synaptic). It also innervates walls of organs, glands, smooth muscle with LONG ____-synaptic with lots of branching.

Responsible for ______ of flight division mediated through epinephrine and norepinephrine’s release on target organs.

A

Pre

Paravertebral . Post

Fight

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2
Q

The ___ controls ___________ and the body at rest “Rest and digest”. Originates in _______ region of spinal cord, medulla, CN’s ,,_,10

The ___ controls body’s response to perceived threat “fight or flight”. Originates in _________ and lumbar regions of spinal cord.

.

A

PNS.
Homeostasis
Sacral
CN: 3,7,9,10

SNS
Thoracic

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3
Q

ANS innervation

Uses two divisions to maintain ___________ or get desired effect. Usually have ________ effects. In most organs, resting tone from ___ predominates.

Organs like the sweat glands, vascular smooth muscle, liver, adipose tissue, and kidney only have ___ innervation

A

….homeostasis

OPPOSITE

PNS resting tone

SNS

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4
Q

State where the ANS control centers are located in the brain.

  1. Helps with water balance, temperature, hunger
  2. Deals with respiration, cardiac, and vasoconstriction
  3. Involved in respiration
A
  1. Hypothalamus
  2. Pons
  3. Medulla
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5
Q

In the PNS, you have __________ receptors on target organs.

M2 which has a G_ coupled protein. M3 which has a G_.

In the SNS you have adrenergic receptors.

Alpha1 which has a G_ coupled protein.
B1 and B2which have a G_ protein

Lastly, alpha2 has a G_ which regulate release of epi and norepi by negative feedback

A

Muscarinic

GI. GQ

GQ. GS

GI

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6
Q

Compare and Contrast nicotinic receptors with muscarinic receptors

A

the main difference between them is their mechanism of action: one uses ions and the other uses G-proteins. Nicotinic receptors are all excitatory, but muscarinic receptors can be both excitatory and inhibitory depending on the subtype. They also differ on where they are found in the body (i.e. sympathetic vs parasympathetic nervous system).

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7
Q

Autonomic nervous system controls everything except your _______ muscle.

A

Skeletal

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8
Q

_____________ nervous system

Craniosacral division with pre-synaptic fibers leave the spine at the level of cranial nerves _, _, _, __ and the sacrum

Synapse in or near target _____. With _____ pre-synaptic

Innervate walls of organs glands and smooth muscle, but with _____ post-synaptic, less branches, discrete effects.

Referred to as the ____ and digest division mediated through Ach release on target organs

A

Parasympathetic

3,7,9,10

Organ. Long

Short

Rest

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9
Q

Sympathetic effects:

______ or _____ response

Activated as an ________ system.

Increases __, __, __ airway and pupil diameter, sweating

________ blood flow to the gut, absorption, and secretions

_______ total body energy production

A

Flight flight

Entire

Blood pressure, blood glucose, heart rate

Decreased

Increases

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10
Q

Parasympathetic effects

_____ and _____ response

Activated on specific _____

_________ HR, BP, pupil diameter etc.

_______ blood flow to the gut, absorption, and secretions

Body is usually under ___ control

A

Rest and digest

Organs

Decreases

Increases

PNS

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11
Q

_____________ sense a drop in BP.

PNS efferent response carried along _____ nerve. Which

A

Baroreceptors

Vagus

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12
Q

Pupillary light reflex is controlled by the ___. The dilator muscle is innervated by ___. Constrictor muscle is innervated by ___. Too much light strikes rentina, PNS activates, not enough ___ activates. Accommodation reflex is also ___ mediated.

Bladder filling and emptying requires both sides to communicate. Emptying of the bladder uses a _________________ control mechanism while filling of the bladder is just the opposite.

A
ANS
SNS
PNS
SNS
ANS

Parasympathetic=emptying

Sympathetic = filling

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