Unit 7- Blood and the Circulatory System

All of the following are functions of blood except:

• Transportation of oxygen and carbon dioxide.

• Regulation of body temperature.

• Synthesis of vitamins.

• Defense against infection.

What protects the body against blood loss?

• Clots formed by clusters of leukocytes.

• Clots formed by platelets and blood proteins.

• Masses of erythrocytes and erythrocyte fragments.

• Constriction of capillaries in the damaged area.

What are the blood cells?

• Erythrocytes, leukocytes, and platelets.

• The buffy coat and plasma proteins.

• Blood cells, cell fragments, and plasma.

• All compounds synthesized by the blood.

Tags

NGSS.HS-LS1-3

The most abundant compound in blood plasma, accounting

for about 92% of the total volume, is:

• Oxygen

• Gamma-globulin

• Sodium chloride

• Water

What ensures the unidirectional flow of blood through the

heart?

• Constant pressure generated by the heart contractions.

• Valves within the heart that prevent backflow of blood.

• Squeezing action of smooth muscle tissue in arterial walls.

• Continuous osmotic outflow of plasma from capillaries.

The ____________ carries blood throughout the body;

the ____________ carries blood only to and from the

lungs.

• systemic circuit; pulmonary circuit

• pulmonary circuit; systemic circuit

• venous circulation; arterial circulation

• arterial circulation; venous circulation

The myocardium is composed of:

• An outer fibrous layer and an inner serous layer.

• Cardiac muscle tissue.

• A simple squamous epithelium and a layer of areolar connective tissue.

Tags

NGSS.MS-LS1-3

All of the following are true of the left ventricle except:

• Wall is typically 3 times thicker than that of right ventricle.

• It is separated from left atrium by Mitral valve.

• Aortic semilunar valve at superior end separates it from the aorta.

• Receives deoxygenated venous blood from the left atrium.

Blood from the systemic circuit returns directly into which

heart chamber?

• left atrium.

• Right auricle.

• Left auricle.

• Right atrium.

The pulmonary trunk carries blood from which heart chamber into the pulmonary circuit?

• Left atrium.

• Right atrium.

• Left ventricle.

• Right ventricle.