1. A rise in arterial blood pressure stretches the vessel walls which contain baroreceptors. Which..

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1. A rise in arterial blood pressure
stretches the vessel walls which contain baroreceptors. Which of the following
responses does this produce? The baroreceptors send a:

A. Slower stream of impulses to the
vasomotor centre which inhibits it

B. Faster stream of impulses to the
vasomotor centre which inhibits it

C. Slower stream of impulses to the
vasomotor centre which stimulates it

D. Faster stream of impulses to the
vasomotor centre which stimulates it

2. Why is the blood pressure in the
pulmonary arteries less than in the aorta?

A. The expansion and contraction of the

1. A rise in arterial blood pressure
stretches the vessel walls which contain baroreceptors. Which of the following
responses does this produce? The baroreceptors send a:

A. Slower stream of impulses to the
vasomotor centre which inhibits it

B. Faster stream of impulses to the
vasomotor centre which inhibits it

C. Slower stream of impulses to the
vasomotor centre which stimulates it

D. Faster stream of impulses to the
vasomotor centre which stimulates it

2. Why is the blood pressure in the
pulmonary arteries less than in the aorta?

A. The expansion and contraction of the
lungs pumps blood through its blood vessels.

B. Blood flowing to the lungs does not
need to overcome gravity.

C. Pulmonary resistance is greater than
the peripheral resistance.

D. Pulmonary resistance is less than
peripheral resistance.

3. When blood pressure is measured in
the brachial artery by the auscultatory method, why should the arm be at the
same level as the heart?

A. If the arm is lower than the heart,
brachial artery pressure will be lower as blood flow is assisted by gravity.

B. If the arm is higher than the heart,
brachial artery pressure will be higher as more force is required to pump blood
up hill.

C. To avoid any hydrostatic pressure
effects on the brachial artery pressure.

D. There is no reason for it; the
practice is part of nursing ritual.

4. Why is blood pressure stated in units
of mmHg? Because:

A. The first barometers operated with
mercury.

B. Standard International (SI) units are
not required in human biology.

C. The haemoglobin molecule contains an
atom of mercury.

D. Blood pressure is a length.

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