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PHY3171 - Cardiovascular physiology and disease - S1 2026

PHY3171 - Cardiovascular physiology and disease - S1 2026

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Sympathetic stimulation of the heart....

Decreases heart rate

Causes vasodilation

Shifts the Frank-Starling curve to the left

Increases contractile strength of the heart

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What is the primary cause of neurogenic postural hypotension?

Medication side effects

Autonomic nervous system dysfunction

Blood volume disorders

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In response to the cold pressor test...

A. Neurones in the hypothalamus are activated

B. Sympathetic activity increases, causing vasodilatation

C. Para-sympathetic activity increases heart rate

D. The hypothalamus signals the nucleus ambiguous allowing heart rate to increase

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When arterial pressure decreases the arterial baroreceptors will fire at a lower frequency

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The rostral ventrolateral medulla projects to the heart via

intermediolateral column

the caudal ventrolateral medulla

glossopharyngeal nerve

the vagus nerve

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Parasympathetic preganglionic neurons, arising from the nucleus ambiguous, at their axon terminals

Release acetylcholine that acts on nicotinic receptors

Release acetylcholine that acts on β1-adrenoreceptors

Release noradrenaline that acts on nicotinic receptors

Release noradrenaline that acts on β1-adrenoreceptors

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Which of the following experimental manoeuvres would increase central blood volume?

Choose the MOST correct answer

Blood loss or application of negative pressure to the lower body

Blood loss or application of a positive pressure to the lower body

Blood transfusion or application of positive pressure to the lower body

Blood transfusion or application of negative pressure to the lower body

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Which of the following manoeuvres does NOT elicit a baroreflex response?

Blood transfusion

Mental arithmetic

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Action potentials are conducted from the carotid and aortic baroreceptors to the cardiovascular controls centres in the brain via...

the vagus and glossopharyngeal nerves.

the vagus and phrenic nerves.

the phrenic and glossopharyngeal nerves.

the vagus nerve.

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When arterial pressure decreases there will be a reflex decrease in vagal input to the heart.

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