SNS Receptors

Question 1

Alpha1 receptors

Answer 1

controls vasoconstriction, increased peripheral resistance with increased BP, pupil dilation, thickened salivary secretions, closure of urinary bladder spincter, male sexual emission

Question 2

Alpha2

Answer 2

Negative feedback control of norepinephrine release from presynaptic neuron

Question 3

Beta1

Answer 3

increased HR, increased conduction through the atrioventricular node, increased myocardial contraction, lipolysis in peripheral tissues

Question 4

Beta2

Answer 4

vasodilation, bronchial dilation, increased breakdown of muscle and liver glycogen, release of glucagon from pancreas, relaxation of uterine smooth muscle, decreased GI muscle tone and activity, decreased GI secretions, relaxation of urinary bladder detrusor muscle

Question 5

Muscarine

Answer 5

pupil constriction, accomidation of lens, decreased HR, increased GI motility, increased GI secretions, increased urinary bladder contraction, male erection, sweating

Question 6

Nicotinic

Answer 6

muscle contractions release of norepinephrine from the adrenal medulla, autonomic ganglia stimulation