Overview of Blood

Question 1

primary functions

Answer 1

transportations, regulation, and protection

Question 2

transportation

Answer 2

oxygen, carbon dioxide, hormones, nutrients, wastes

Question 3

regulation

Answer 3

body temperature, pH, fluid levels in cardiovascular system

Question 4

protection

Answer 4

leukocytes guard against infection by triggering immune response to antigens, blood carries antibodies

Question 5

whole blood components

Answer 5

• erythrocytes: red blood cells (44%)
• buffy coat: white blood cells (<1%)
• plasma: platelets (55%)

Question 6

whole blood hematocrit

Answer 6

• hematocrit: percentage of volume of all formed elements in the blood
• varies with age and sex (males slightly higher)

Question 7

plasma

Answer 7

• mostly water (92%)
• proteins
• electrolytes
• respiratory gases
• waste
• other solutes

Question 8

erythrocytes

Answer 8

transport respiratory gases

Question 9

leukocytes

Answer 9

white blood cells, immune responses against pathogens

Question 10

platelets

Answer 10

blood clotting