An increase in arterial pressure

Contraction of smooth muscle in the walls of veins

All of the above.

Relaxation of the smooth muscle in the walls of arterioles

An increase in the time available for passive filling of the ventricles.

A decrease in parasympathetic stimulation to the heart.

Increased end-diastolic volume.

Adrenaline causing an increase in the contractility of cardiac muscle.

increased sympathetic stimulation to the heart.

increased sympathetic stimulation to the veins.

increased sympathetic stimulation to the arterioles.

increased levels of circulating adrenaline.

Is more efficient when the lung is filled with fluid.

Decreases the surface tension only in the large alveoli.

Increases the work of breathing.

Decreases the surface tension and therefore stabilizes the alveoli.

relies on the fact that the baroreceptor reflex becomes non-functional after blood pressure has been elevated for a prolonged period.

is closely linked to the regulation of total body salt and water.

involves stretch receptors located in the kidneys.

involves all of the above.

increases; nutrients need to be absorbed more quickly from the gut into the bloodstream during exercise.

decreases; increased sympathetic stimulation causes the arterioles supplying them to constrict.

increases; cardiac out put and total blood flow around the body has increased.

decreases; parasympathetic stimulation to the arterioles supplying them decreases.

experience chest pain when trying to exercise at a high intensity.

All of the above are correct.

have a low oxygen content in their arterial blood.

have a lower resting cardiac output than a healthy person.

an increase in parasympathetic nerve activity to the heart.

an increase in sympathetic nerve activity to arterioles.

a subsequent increase in venous pressure.

a decrease in the rate of firing of arterial baroreceptors.

The lung volume is changing.

The alveolar pressure is negative.

All of the above.

The diaphragm is moving.

An decrease in heart rate

Relaxation of smooth muscle in the walls of veins

An increase in cardiac muscle contractility

Dilation of arterioles