Cardiovascular System:effects of aging on the heart

Question 1

common age-related change.
This appears to result from a gradual increase in the pressure in the aorta, against which the left ventricle must pump blood, and a gradual increase in the stiffness of cardiac muscle tissue

Answer 1

hypertrophy of the left ventricle

Question 2

The maximum heart rate gradually declines, as can be roughly predicted by the following formula:

Answer 2

Maximum heart rate = 220 - Age of individual

Question 3

The rate at which cardiac muscle breaks down ATP increases, and the rate of Ca?+ transport decreases. (t or F)

Answer 3

true

Question 4

Both the resting and maximum cardiac outputs slowly decline as people age;

Answer 4

by 85 years of age

Question 5

decreased percentage of cardiac output

Answer 5

30-60%

Question 6

(true or false)
enlarged and thickened cardiac muscle, especially in the left ventricle, requires more oxygen to pump the same amount of blood pumped by a younger heart.

Answer 6

true

Question 7

(true or false)
Approximately 10% of elderly people over 80 have congestive heart failure, and a major contributing factor is coronary artery disease.

Answer 7

true

Question 8

has many beneficial effects on the heart. Regular aerobic exercise improves the heart’s functional capacity at all ages, provided the person has no other conditions that cause the extra workload on the heart to be harmful.

Answer 8

excercise