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Ch. 11 Cardiovascular System
Marieb - Essentials of Human Anatomy & Physiology 13th Edition
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340Not the one you use?Change textbook
All textbooksMarieb 13th EditionCh. 11 Cardiovascular SystemProblem 13
Chapter 11, Problem 13

More than one choice may apply.
Which of the following are associated with aging?
a. Increasing blood pressure
b. Weakening of venous valves
c. Arteriosclerosis
d. Collapse of the ductus arteriosus

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1
Understand the physiological changes associated with aging. Aging impacts various systems in the body, including the cardiovascular system, leading to changes such as increased blood pressure, weakening of venous valves, and arteriosclerosis.
Analyze each option provided in the question: a) Increasing blood pressure is commonly associated with aging due to reduced elasticity of arteries and changes in vascular resistance. b) Weakening of venous valves occurs as part of the aging process, contributing to issues like varicose veins. c) Arteriosclerosis, the thickening and hardening of arterial walls, is a hallmark of aging and can lead to cardiovascular complications. d) Collapse of the ductus arteriosus is not associated with aging; it is a normal process that occurs shortly after birth as part of fetal circulation transitioning to postnatal circulation.
Eliminate the option that is not related to aging. The ductus arteriosus is a fetal structure that closes after birth, so option d is not relevant to aging.
Select the options that are directly associated with aging based on the physiological changes described: a, b, and c.
Review the selected answers to ensure they align with the known effects of aging on the cardiovascular system, confirming that increasing blood pressure, weakening of venous valves, and arteriosclerosis are correct choices.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Aging and Cardiovascular Changes

As individuals age, various cardiovascular changes occur, including increased blood pressure due to stiffening of blood vessels and increased vascular resistance. This can lead to hypertension, which is a common condition in older adults and is associated with various health risks.
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Venous Valve Function

The weakening of venous valves is a significant concern in aging, as these valves help prevent the backflow of blood in the veins. Over time, the structural integrity of these valves can diminish, leading to conditions such as chronic venous insufficiency, which is characterized by swelling and discomfort in the legs.
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Arteriosclerosis

Arteriosclerosis refers to the thickening and hardening of arterial walls, which is commonly seen in older adults. This condition can lead to reduced blood flow and increased risk of cardiovascular diseases, including heart attacks and strokes, making it a critical aspect of aging-related health issues.
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Textbook Question

More than one choice may apply.

Which layer of the artery wall thickens most in atherosclerosis?

a. Tunica media

b. Tunica intima

c. Tunica adventitia

d. Tunica externa

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Textbook Question

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Which heart chamber pumps blood with the greatest amount of force?

a. Right atrium

b. Right ventricle

c. Left atrium

d. Left ventricle

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Textbook Question

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Vessels involved in the circulatory pathway to and/or from the brain are the

a. Brachiocephalic trunk

b. Subclavian artery

c. Internal jugular vein

d. Internal carotid artery

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Textbook Question

More than one choice may apply.

An increase in BP would be caused by all of the following except

a. Increase in SV

b. Increase in heart rate

c. Hemorrhage

d. Vasoconstriction of the arterioles

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Using the figure, identify the most external part of the pericardium.

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Textbook Question

More than one choice may apply.

A stroke that occludes a posterior cerebral artery will most likely affect

a. Hearing

b. Vision

c. Smell

d. Higher thought processes

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