Autonomic Nervous System III

Question 1

Homotropic interactions

Answer 1

transmitter inhibits the nerve terminal that it’s being released from

Question 2

What type of receptor has homotropic interactions

Answer 2

M2 or alpha2

Question 3

Heterotropic interactiosn

Answer 3

one neurotransmitter affects the release of another via actions of heteroreceptors

Question 4

What type of receptor has heterotropic interactions

Answer 4

alpha2

Question 5

Denervation supersentitivity

Answer 5

i. Basically you have like beta blockers that are blocking ganglionic transmission, then you take it away and target organs become supersensitive

Question 6

Mechanisms of denervation supersentivity

Answer 6

1. Proliferation of receptors

2. Loss of mechanisms for removal of transmitter

Question 7

Cotransmission

Answer 7

neurons release more than 1 transmitter or modulator

Question 8

Fnctions of autonomic nervous system

Answer 8

help body maintain constant internal environment

accommodate coordinated responses to external stimuli

Question 9

Are the sympathetic and parasymphatic nervous systems physiologicalopposites?

Answer 9

NO

Question 10

what neurotransmitters have autoreceptors

Answer 10

NE and AcH

Question 11

what are sympathetic autoreceptors

Answer 11

alpha-2

Question 12

what are parasympathetic autoreceptors

Answer 12

M2

Question 13

activation of autoreceptors causes what

Answer 13

inhibition of release of their subtance

Question 14

binding of NE to parasympathetic nervce can do whatq

Answer 14

decrease secretion of acetylcholine

Question 15

acetylcholine released to sympathetic nerve receptors can do waht

Answer 15

decrease release of EN

Question 16

heteroreceptors on sympaethtic nerves are M2 receptors that do what

Answer 16

respond to ACh to decrease cAMP

Question 17

heteroreceptors on parasympathetic nerves are A2 receptors that do waht

Answer 17

repond to norepinephrine

Question 18

neuromodulator

Answer 18

substance/hormone peptide released that affects the release of another neurotransmitter

Question 19

ATP adn NE when released by small granular vesicles do what

Answer 19

act on receptors to increase Ca++ and cause contraction

Question 20

what secretes neuropeptide Y (NPY)

Answer 20

large granular vesicles

Question 21

function of NPY

Answer 21

act on receptors on target organ to cause contraction. At the same time it decreases secretion of other 2 substances

Question 22

incraeses BP has what affect on baroreceptor discharge

Answer 22

increases

Question 23

increase in baroreceptor charge does waht

Answer 23

activate vasomotor center to inhibit sympaethtic derive to decrease vasoconstriction

Question 24

decrease in bp has what affect on the kidney

Answer 24

decreases renal blood flow, increases renin production and angiotensis