Lecture 13, Autonomic

Question 1

autonomic NS innervates…

Answer 1

all effector organs EXCEPT skeletal muscle

Question 2

dual innervation

Answer 2

organs innervated by both division, used by para and sympa

Question 3

sympathetic

Answer 3

thoraco-lumbar
CNS to effectors
active during activity and stress

Question 4

sympathetic results

Answer 4

decreases GI activities
pupillary dilation
increases hr/bp
mobilizes energy stores, takes glycogen from muscles, fats, etc

Question 5

parasympathetic

Answer 5

cranial/sacral to effectors

active during quiet/relaxed states

Question 6

parasympathetic results

Answer 6

increases GI activity
decreases hr/bp
pupillary constriction

Question 7

how long are autonomic pathways

Answer 7

generally two neurons long

Question 8

sympathetic pathways (steps)

Answer 8

1. pregang neuron (cholinergic)
2. sympathetic chain OR collateral ganglion
3. postgang neuron (adrenergic)
4. effector organ (adrenergic receptors)

Question 9

parasympathetic pathways

Answer 9

1. pregang neuron (cholinergic)
2. parasympathetic ganglion
3. postgang neuron (cholinergic)
4. effector organ (muscarinic receptors)

Question 10

pregang neurons are always

Answer 10

cholinergic

Question 11

sympathetic postgang neurons

Answer 11

adrenergic

Question 12

parasympathetic postgang neurons

Answer 12

cholinergic

Question 13

adrenergic receptors

Answer 13

respond to norepinephrine
found at all sympathetic effector organs
two classes: alpha, beta

Question 14

alpha adrenergic receptors

Answer 14

most common
usually excitatory
greater affinity to norepi

Question 15

beta adrenergic receptors

Answer 15

G-protein system, increases cAMP

activated by both norepi and epi

Question 16

cholinergic receptors

Answer 16

respond to acetylcholine

two classes: nicotinic, muscarinic

Question 17

nicotinic cholinergic receptors

Answer 17

@ dendrites of postgang
@ adrenal medulla
@ skeletal muscles

function: open Na+ and K+ channels

Question 18

when nicotinic receptors open Na+ channels…

Answer 18

they are EPSP’s

Question 19

when nicotinic receptors open K+ channels…

Answer 19

they are IPSP’s

Question 20

muscarinic receptors location

Answer 20

all parasympathetic effector organs

Question 21

muscarinic receptor function

Answer 21

g-protein system

opens/closes ion channels

Question 22

what does the somatic nervous system control

Answer 22

skeletal muscle

Question 23

somatic ns pathway

Answer 23

one MOTOR neuron between cns and effector organ

Question 24

somatic motor neuron releases

Answer 24

Ach

Question 25

somatic effector organ receptors

Answer 25

nicotinic cholinergic receptors