lecture 6: autonomic nervous system

Question 1

sympathetic actions

Answer 1

fight or flight

Question 2

sympathetic: short or long preganglionic

Answer 2

short

Question 3

main NT of sympathetic

Answer 3

NE and Ep

Question 4

main receptors of sympathetic

Answer 4

alpha and beta adrengeric receptors

Question 5

parasympathetic actions

Answer 5

rest and digest

Question 6

parasympathetic long or short preganglionic

Answer 6

long

Question 7

main NT of parasympathetic

Answer 7

ACh

Question 8

receptors of parasympathetic

Answer 8

muscarinic ACh

Question 9

dual innervation

Answer 9

most organs receive input SNS and PSNS
* generally opposing effects

Question 10

which division uses the adrenal medulla to send Epi through bloodstream

Answer 10

sympathetic

Question 11

alpha1 receptor

Answer 11

causes Ca2+ release inside cells; common use it so stimulate smooth muscle contraction

Question 12

alpha2 receptor

Answer 12

location is usually presynaptic; inhibits NT release

Question 13

beta1 receptor

Answer 13

increases HR

Question 14

beta2 receptor

Answer 14

triggers relaxation of smooth muscles along respiratory tract and ceterain blood vessels

Question 15

beta3 receptor

Answer 15

leads to lipolysis, the breakdown of triglycerides in adipocytes

Question 16

muscarine

Answer 16

a mushroom toxin that activiates muscarinic receptors (symptoms resemble PSNS activation)

Question 17

how does SNS allow the body to carry out a fight-or-flight response

Answer 17

widens pupil and flattens lens for distance vision
increases cardiac output so you can run away

Question 18

autonomic tone

Answer 18

one division is usually dominant
* ex: parasympethetic division: decrease HR; sympathetic: increase HR
* parasympathetic dominates (resting HR is ~70bpm)