Author Question: The heart muscle commonly weakens with age. What is a consequence of this fact? A) The heart ... (Read 75 times)

sammy · **on:** Jul 11, 2018

The heart muscle commonly weakens with age. What is a consequence of this fact?

A) The heart beats faster but pumps with less force.
B) Fatty deposits and other substances clog narrowed coronary vessels.
C) Blood pressure lowers because of systemic vasodilation.
D) The time required for the heart's diastolicsystolic cycle decreases.

Question 2

Each of the blood vessel layers is affected differently by the aging process. Which would a nurse suspect is responsible for a patient's fibrosis?

A) Tunica intima
B) Tunica media
C) Tunica adventitia
D) Fibrosis is caused by an enlarged heart

Smiles0805 · **Reply #1 on:** Jul 11, 2018

Answer to Question 1

A
Feedback:
The statement in choice B is true, but age-weakened heart muscle is not the cause. Blood pressure may actually rise as an effect of choice B. The opposite of the statement in choice D is true.

Answer to Question 2

A
Feedback:
The tunica intima, the innermost layer, experiences the most direct changes, including fibrosis, calcium and lipid accumulation, and cellular proliferation. The middle layer, the tunica media, undergoes a thinning and calcification of elastin fibers and an increase in collagen, which causes a stiffening of the vessels. The outermost layer, the tunica adventitia, is not affected by the aging process. In the absence of heart disease, heart size changes little with age.