Biology: Concepts and Investigations

Mariëlle Hoefnagels

Chapter 29 The Circulatory System - all with Video Answers

Educators

Chapter Questions

00:44

Problem 1

How are open and closed circulatory systems similar? How are they different?

Sam Limsuwannarot

Numerade Educator

00:58

Problem 2

Describe the circulatory systems of fishes, lizards, and mammals. What is the advantage of separating the pulmonary and systemic circulatory pathways?

Sam Limsuwannarot

Numerade Educator

00:45

Maintaining the proper proportions of cells and platelets in the blood is essential for health. What can happen when the blood contains too few or too many red blood cells? Too few or too many white blood cells? Too few or too many platelets?

Sam Limsuwannarot

Numerade Educator

00:32

Problem 4

Why can a person with type A blood not receive a transfusion of type B blood? If a person has type $O$ blood, what blood type(s) can he or she receive in a transfusion?

Sam Limsuwannarot

Numerade Educator

00:23

Problem 5

Why is blood clotting that happens too quickly or too slowly dangerous?

Sam Limsuwannarot

Numerade Educator

00:36

Problem 6

One effect of aspirin is to prevent platelets from sticking together. Why do some people take low doses of aspirin to help prevent a heart attack?

Sam Limsuwannarot

Numerade Educator

00:32

Problem 7

Trace the pathway of an $\mathrm{O}_{2}$ molecule from the lungs to a respiring cell at the tip of your finger.

Sam Limsuwannarot

Numerade Educator

02:29

Problem 8

Describe the relationship between blood and interstitial fluid.

Ali Crampton

Numerade Educator

00:20

Problem 9

Why is the heart sometimes called "two hearts that beat in unison"?

Sam Limsuwannarot

Numerade Educator

00:45

Problem 10

Describe the events that occur during one cardiac cycle.

Sam Limsuwannarot

Numerade Educator

01:52

Problem 11

Athletes usually are slim and strong, have low blood pressure, do not smoke, and alleviate stress through exercise. How might these characteristics complicate a study designed to assess the effects of exercise on the circulatory system?

Eric Goldman

Numerade Educator

02:15

Problem 12

Make a chart that compares systemic arteries, capillaries, and systemic veins in terms of the following properties: overall structure; amount of smooth muscle; presence of valves; cross-sectional area; blood pressure; blood velocity; direction of blood flow relative to the heart; $\mathrm{O}_{2}$ content of blood.

Josee Pacheco

Numerade Educator

00:26

Problem 13

Endothelial cells lining the heart and blood vessels are the only cells to receive nutrients and $\mathrm{O}_{2}$ directly from blood. How do the rest of the body's cells receive these resources and dispose of wastes?

Sam Limsuwannarot

Numerade Educator

00:45

Problem 14

Explain why blood pressure is highest in the arteries and lowest in the veins.

Sam Limsuwannarot

Numerade Educator

00:22

Problem 15

What types of changes in blood vessels would raise blood pressure?

Sam Limsuwannarot

Numerade Educator

00:46

Problem 16

The carotid artery extends from the heart to the head. Some of the body's blood pressure receptors are located in the carotid sinus, where the carotid artery passes through the neck. If you press lightly on the carotid sinus, what do you predict should happen to your heart rate? What if you press lightly on a spot just below the carotid sinus?
Hint: Figure 29.16 may help you answer this question.

Sam Limsuwannarot

Numerade Educator

00:30

Problem 17

Describe a process discussed in the chapter that illustrates negative feedback.

Sam Limsuwannarot

Numerade Educator

03:19

Problem 18

Where does lymph originate? What propels lymph through the lymphatic vessels? How is the lymphatic system connected with the circulatory system? The immune system?

Briana De La Torre

Numerade Educator

00:41

Problem 19

A common treatment for breast cancer is to surgically remove the cancerous tissue along with associated lymph nodes. Women who undergo this surgery sometimes develop swollen arms. Explain this phenomenon.

Sam Limsuwannarot

Numerade Educator

00:38

Problem 20

What are the roles of cardiac, smooth, and skeletal muscle in the circulatory system?

Sam Limsuwannarot

Numerade Educator

00:47

Problem 21

Describe the interactions between the circulatory system and the respiratory, immune, digestive, and endocrine systems.

Sam Limsuwannarot

Numerade Educator

01:18

Problem 22

For reasons that scientists do not fully understand, diabetes (see chapter 27 ) impairs the circulatory system. Explain how damage to the blood vessels and peripheral nerves of the kidneys, eyes, and extremities causes many of the complications of diabetes, including blindness, kidney failure, and poor wound healing.

Sam Limsuwannarot

Numerade Educator

01:18

Problem 23

Sam Limsuwannarot

Numerade Educator

04:41

Problem 24

How is the human cardiovascular system similar to and different from the vascular tissue in a plant?

Allison Reynolds

Numerade Educator

00:24

Problem 25

Section 8.9 describes the rationale behind cancer treatments called angiogenesis inhibitors, drugs that inhibit the growth of blood vessels toward a tumor. Why would tumors without a blood supply quit growing (or even shrink)?

Sam Limsuwannarot

Numerade Educator

02:41

Problem 26

Use the Internet to learn more about disorders of the cardiovascular or Iymphatic system. Choose one to investigate in more detail. What causes the disease you chose? Who is affected, and what are the consequences? Are there ways to prevent, treat, or cure the disease?

Josee Pacheco

Numerade Educator

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