Chp 17

Question 1

describe the origin of leukocytes

Answer 1

Bone marrow

Question 2

describe the specific fates of lymphocytes

Answer 2

become either a B or T lymphocytes

Question 3

describe the specific fates Of B lymphocytes

Answer 3

B remain in bone morrow during maturation

Question 4

describe the specific fates of T lymphocytes

Answer 4

T migrate from bone marrow to thymus gland to complete maturation

Question 5

describe the 2 enzymes found in erythrocyte cytosol

Answer 5

Glycolytic: generate ATP
Carbonic anhydrase: convert carbon dioxide and water into carbonic acid

Question 6

what are the functions of erythrocytes

Answer 6

Transport oxygen from lung to tissues and transport carbon dioxide from tissue to lungs

Question 7

What is the total erythrocyte count

Answer 7

5million cells per microliters

Question 8

describe the physical features of an erythrocyte

Answer 8

Bi concave disc 7-8 micrometers in diameter and 2 micrometers thick

Question 9

physiological benefits of the biconcave shape

Answer 9

large surface area to volume ratio;short diffusion distance;high diffusion rate for oxygen and carbon dioxide; more flexible and less fragile

Question 10

benefits and drawbacks of the lack of nucleus and organelles in erythrocytes

Answer 10

Benefit: smaller and can pass through capillaries more easily
Drawback: cant make any new molecule to repair their cell membranes; short life span

Question 11

describe a hemoglobin molecule

Answer 11

Large complex protein; 4 subunits; each subunit is a complexly folded long peptide chain with heme group in center

Question 12

the average hemoglobin concentration is:

Answer 12

15 grams per deciliter of blood