Ch.2 Cardiorespiratory System

Question 1

What makes up the cardiovascular and respiratory systems?

Answer 1

Heart, blood vessels, blood & lungs

Question 2

What is provided to functioning tissues?

Answer 2

O2 and nutrients

Question 3

What is removed from functioning tissues?

Answer 3

Metabolic byproducts (eg CO2)

Question 4

The cardiorespiratory system responds to changes in …

Answer 4

Metabolic demands

Question 5

Whole body is comprised of
55% …
45% …
<1% …

Answer 5

Plasma
Erythrocytes (RBC)
Leukocytes (WBC)

Question 6

Average healthy human has around … of blood volume & pH of…

Answer 6

5.0L
~7.4

Question 7

What affects pH? What regulates it?

Answer 7

Stress, exercise, or diseases
Buffers

Question 8

Oxygen is carried via…, which binds btw …-… oxygen molecules

Answer 8

Hemoglobin
1-4

Question 9

Iron containing protein

Answer 9

Hemoglobin

Question 10

Exercise increases … & decreases …

Answer 10

Body temperature
pH

Question 11

Composes O2 saturation of hemoglobin to partial pressure of O2 in the blood

Answer 11

Oxygen-hemoglobin dissociation curve

Question 12

Binds O2 facilities subsequent binding

Answer 12

Oxygen-hemoglobin dissociation curve

Question 13

Influencing factors of oxygen transport

Answer 13

Core body temperature
Arterial blood acidity (low pH)

Question 14

What does reduced affinity for O2 do?

Answer 14

O2 is released more easily
O2 can then be used by the working tissues

Question 15

Muscular wall of the heart

Answer 15

Myocardium

Question 16

TF: The heart is a muscular organ

Answer 16

True

Question 17

TF: Cardiac muscles voluntarily