Biology Self Check 61 and 62

Plasma contains dissolved minerals and water.

• True

• False

The circulatory system transports nutrients to all parts of the body.

• True

• False

White blood cells are more numerous in the blood than red blood cells.

• True

• False

The molecule in the red blood cell that carries oxygen is hemoglobin.

• True

• False

Differences in blood groups are due to antibodies.

• True

• False

If blood type A is mixed with blood type B, it will clump.

• True

• False

The sinoatrial node is the heart's pacemaker.

• True

• False

Oxygen diffuses into the blood and carbon dioxide diffuses out of the blood in the bronchioles.

• True

• False

The walls of the alveoli are several cells thick.

• True

• False

The major function of the alveoli is to allow the diffusion of carbon dioxide out of the blood.

• True

• False