KA 2.5 & 2.6 Structure and function of blood vessels and heart

Name X

• right atrium

• left atrium

• sinoatrial node

• atrioventricular node

Name Y

• right ventricle

• AV valve

• sinoatrial node

• atrioventricular node

What is the function of valve Z?

• to prevent the backflow of blood from the right ventricle to the right atrium

• to prevent the backflow of blood from the left ventricle to the left atrium

• to prevent the backflow of blood from the left atrium to the left ventricle

• to prevent the backflow of blood from the right atrium to the right ventricle

Electrical impulses pass from X to Y - what is happening to the heart at this time?

• Diastole

• Ventricular diastole

• Ventricular systole

• Atrial systole

During which stage of the cardiac cycle is Z closed?

• Diastole

• Ventricular diastole

• Ventricular systole

• Atrial systole

Name the type of blood vessel X

• artery

• arteriole

• capillary

• venule

By which process could vessel X reduce blood flow to the capillary network?

• vasoconstriction

• vasodilation

• pressure filtration

• osmosis

Name the layer of cells which forms the wall of a capillary

• lumen

• endothelium

• muscular layer

• outer connective layer

Choose a substance that will pass from the capillary to the tissue fluid

• red blood cells

• plasma proteins

• carbon dioxide

• glucose

Choose a substance that will pass from the cells to the tissue fluid

• oxygen

• amino acids

• carbon dioxide

• glucose