Chapter 21

Question 1

Megakaryocytes produce

Answer 1

platelets

Question 2

Select all that apply. Erythrocytes lack
-cell membrane
-organelles
- a nucleus

Answer 2

-organelle
-a nucleus

Question 3

The red-pigmented protein in erythrocytes that transports oxygen and carbon dioxide is called __________.

Answer 3

Hemoglobin

Question 4

Check all that are functions of the blood in the body.
-transports oxygen from lungs to body cells
-transports carbon dioxide from cells to the lungs
-produces hormones to be transported to the endocrine glands
-regulates body temperature
-helps maintain normal body pH levels
-helps guard against infection

Answer 4

-transports oxygen from lungs to body cells
-transports carbon dioxide from cells to the lungs
-regulates body temperature
-helps maintain normal body pH levels
-helps guard against infection

Question 5

The cell fragments that are a component of blood are

Answer 5

platelets

Question 6

Middle layer; leukocytes and platelets

Answer 6

Buffy coat

Question 7

Lower layer; red blood cells

Answer 7

Erythrocytes

Question 8

Top layer; straw-colored liquid

Answer 8

Plasma

Question 9

What are the components of the formed elements?

Answer 9

-erythrocytes
-leukocytes
-platelets

Question 10

Each hemoglobin molecule within an erythrocyte is capable of carrying how many molecules of oxygen?

Answer 10

four