Cardiovascular System

Which of the following divides the heart into two pumps?

• The septum

• The tricuspid valve

• The bicuspid valve

• The mitral valve

Which of the following has the thickest wall?

• Artery

• Capillary

• Vein

• Capillary and vein

In which part of the body does venous pooling occur?

• Head

• Head

• Legs

• Ears

Systemic circulation is initiated when the contraction of the left ventricle pushes oxygenated blood into the aortas.

• True

• False

Blood plasma makes up 45 per cent of blood volume.

• True

• False

Superior and inferior vena cava bring oxygenated blood to the right atrium of the heart.

• True

• False

A long-term exercise program may increase the number of capillaries supplying blood to muscles (including the heart).

• True

• False

Which of the following situations leads to vasoconstriction to muscles and skin?

• The body is too hot and it needs to lose heat.

• The body is neither too hot nor too cold.

• The body is at rest and the surroundings experience mild temperature.

• The body is too cold and it needs to retain heat.

Which of the following is the temperature change leading to hyperthermia?

• A rise in core temperature greater than 37.5–38.3 °C

• A rise in core temperature greater than 36.5–37 °C

• A rise in core temperature greater than 27–29 °C

• A rise in core temperature greater than 30–35 °C

Which of the following is the temperature change leading to hypothermia?

• The body’s core temperature falls below 37 °C

• The body’s core temperature falls below 35 °C

• The body’s core temperature falls below 20 °C

• The body’s core temperature falls below 20 °C