1 - Intro to ANS

Question 1

Which of the following effects would be observed after blockade of nicotinic acetylcholine receptors in an individual at rest?

A: Bronchoconstriction
B: Increased sweat production
C: Constipation
D: Increased urinary frequency
E: Short-sightedness

Answer 1

C: Constipation

Question 2

What effect would blockade of nicotinic acetylcholine
receptors have on heart rate;
a) At rest
b) During exercise

Answer 2

a) At rest parasym dominant so blockade would cause increase in HR
b) During exercise symp dominant so blockade would casue decrease in HR

Question 3

Blockade of which of the following receptor sub-types would induce both an increased heart rate and a reduction in sweat production during exercise?

A: Muscarinic receptors
B: α1  adrenoceptors
C: α2  adrenoceptors
D: β1  adrenoceptors
E: β2  adrenoceptors

Answer 3

A: Muscarinic receptors

Question 4

Blockade of which of the following targets would cause the most significant rise in synaptic noradrenaline concentrations?

A: Tyrosine hydroxylase
B: DOPA decarboxylase
C: Uptake 1 transport protein
D: Monoamine oxidase
E: Cathecol-O-methyl transferase

Answer 4

C: Uptake 1 transport protein