Circulatory system Chapter 7

Front

The main organ of the circulatory system is the lungs.

Back

False

Front

The heart beats at different rates depending upon whether your body is at rest or at work.

Back

True

Front

Atherosclerosis is a condition in which a fatty deposit called plaque builds up inside arteries.

Back

True

Front

When blood flow to a person's heart is cut off by a blocked artery, the person has suffered a stroke.

Back

False

Front

Hypertension is a disease in which the small airways of the lungs lose normal elasticity.

Back

False

Front

VO is the largest amount of oxygen your body is able to process during strenuous aerobic exercise.

Back

True

Front

Slow-twitch muscle fibers are associated with your ability to do anaerobic work.

Back

False

Front

One benefit of regular aerobic activity is reduced anxiety and improved concentration.

Back

True

Front

Anaerobic activity requires high levels of energy and is done very briefly at a high level of intensity.

Back

True

Front

Interval training is a program in which high-intensity physical activities alternate with low-intensity recovery bouts for several minutes at a time.

Back

True