Chapter 7.2

Question 1

What is the composition of blood in terms of liquid and cells

Answer 1

-55% of liquid and 45% cells

Question 2

What is the liquid portion of blood referred to as. What does it contain

Answer 2

• it is plasma

- >it is mixture of nutrients, salts, respiratory gases, hormones and blood proteins

Question 3

What are the three types of cells in the blood

Answer 3

1) erythrocytes
2) leukocytes
3) platelets

Question 4

Why are red blood cells concave

Answer 4

• they are biconcave
• > travels through tiny capillaries
• it increases a cell’s surface area
• > allows for greater gas exchange

Question 5

Do mature blood cells have nuclei and mitochondria

Answer 5

-no they don’t have nuclei or mitochondria

Question 6

What does hematocrit measure

Answer 6

• it measures how much of the blood sample consists of red blood cells
• between 41% and 53% for males and 36%/46% for females

Question 7

Where do platelets originate from?

Answer 7

• they originate from cell fragments known as megakaryocytes

- >their function is to assist in blood clots

Question 8

Where is erythropoietin released from

Answer 8

-it is released from the kidneys and stimulates red blood cell development

Question 9

Where is thrombopoietin released from?

Answer 9

• it is released by the liver and kidney

- >stimulates normal platelet development

Question 10

What blood type is considered universal donors

Answer 10

-people with blood type O are universal donors

Question 11

What blood type is considered universal recipients

Answer 11

-people with blood type AB are universal recipients

Question 12

Is whole blood given in transfusion?

Answer 12

-no just the packed red blood cells with no plasma are given

Question 13

What are the granular leukocytes

Answer 13

• neutrophils, eosinophils and basophils
• > granules contain a variety of compounds tht are toxic to invading microbes
• > contents released through exocytosis

-granular leukocytes are used for inflammatory reactions, allergies, pus formation and destruction of bacteria/parasites

Question 14

What are agranular leukocytes

Answer 14

• lymphocytes and monocytes
• > lymphocytes are part of the specific immune response
• > bone marrow maturation=B cells. thymus maturation=T cells
• monocytes in skin=Langerhans cells
• monocytes in CNS=microglia
• monocytes in bones=osteoclasts