Circulation Test Review

Capillary beds are equipped with sphincter muscles in order to …

A. prevent the backflow of blood
B. expand and recoil with each heartbeat
C. divert blood toward areas of increased metabolic activity
D. hold blood in the beds until nutrient and waste exchange

C. divert blood toward areas of increased metabolic activity

The most muscular chamber of the heart is the …

A. left atrium
B. right atrium
C. left ventricle
D. right ventricle

C. left ventricle

1. Systole of the ventricles

2. Opening of the atrio-ventricular valves

3. Electrical impulse sent from the SA node

4. Atria fill with blood

What is the order of the events above?

4, 3, 2, 1

A red blood cell leaves the aorta, makes a circuit through the body, and arrives back in the capillaries of the alveoli. The correct sequence of organs through which the cell may have travelled is …

A. lung, heart, small intestine, liver
B. small intestine, heart, liver, lungs
C. liver, lungs, small intestine, heart
D. small intestine, liver, heart, lungs

D. small intestine, liver, heart, lungs

A red blood cell is located in an artery in your right arm. How many capillary beds must this cell pass through before it is returned to the left ventricle?

A. one
B. two
C. three
D. four

B. two (subclavian and pulmonary capillaries)

Blood capillaries and lymph capillaries both …

A. filter bacteria
B. have one-way valves
C. contain red blood cells
D. have walls which are one-cell thick

D. have walls which are one-cell thick

How do oxygen and nutrient levels in the adult vena cava compare to those levels in the fetal vena cava?

A. The fetal oxygen and nutrient levels are higher
B. The adult oxygen and nutrient levels are higher
C. The fetal oxygen levels are higher, while the nutrient levels are lower.
D. The adult nutrient levels are higher, while the oxygen levels are lower

A. The fetal oxygen and nutrient levels are higher

High blood pressure can be the result of …

A. decreased blood volume
B. increased sodium absorption
C. decreased aldosterone release
D. increased opening of capillary beds

B. increased sodium absorption

Use the following information to answer the question:

• transport gases

• maintain body temperature

• protect the body against blood loss

• produce hormones that stimulate metabolism

• carry digestive enzymes to the small intestine

How many of these are functions of the blood?

A. two
B. three
C. four
D. five

B. three

• transport gases

• maintain body temperature

• protect the body against blood loss

Arrange the following steps in the sequence that occurs in an inflammatory reaction.

1. Pus forms at the injury site

2. Damaged cells release histamines

3. Increased permeability of the capillary wall

4. Swelling and redness at the injury site

2, 3, 4, 1

A person with type AB blood has …

A. A antigens and B antibodies
B. both A and B antigens and A and B antibodies
C. no A or B antigens but both A and B antibodies
D. both A and B antigens but no A or B antibodies

D. both A and B antigens but no A or B antibodies

What is the order of these events?

1. Vesicles fuse with a lysosome

2. Bacterium is taken into the macrophage

3. Digestion of the bacterium occurs

4. Vesicle is formed around the bacterium

2, 4, 1, 3

Red blood cells are formed by …

A. muscle tissue
B. nervous tissue
C. epithelial tissue
D. connective tissue

D. connective tissue