week 2- blood

Question 1

List and describe functions of blood

Answer 1

the blood is the life-sustaining transport vehicle of the cardiovascular system its main function is protection( prevention of infection and blood loss), regulation(temperature PH Levels and fluid in the circulatory system), and transportation (delivering o2 Transporting metabolic wastes to lungs and kidneys for elimination
– Transporting hormones from endocrine organs to target organs_

Question 2

Discuss the composition and functions of plasma.

Answer 2

Blood is the only fluid tissue in body
* Type of connective tissue
– Matrix is nonliving fluid called plasma
– Cells are living blood cells called formed elements
* Cells are suspended in plasma

Question 3

Describe the structure, function, and production of erythrocytes.

Answer 3

also known as RBC. They are filled with hemoglobin for the transport of gas
The cell has a biconcave disc shape, is anucleate, and essentially has no organelles
RBCs are dedicated to respiratory gas transport
* Hemoglobin binds reversibly with oxygen

Question 4

List the classes, structural characteristics, and functions of leukocytes.

Answer 4

also known as WBC. only blood cell that is complete with nuclei and organelles. they function to fight against the disease. WBC can be further divided into granulocytes and agranulocytes

Question 5

Describe the structure and function of platelets.

Answer 5

platelets seal small tears in blood vessels.

Question 6

Describe the process of hemostasis

Answer 6

hemostasis is a fast series of responses to stop bleeding and requires clotting factors such as platelets

Three steps are involved
Step 1: Vascular spasm
Step 2: Platelet plug formation
Step 3: Coagulation (blood clotting)

Positive feedback cycle: as more platelets stick, they release more chemicals, which cause more platelets to stick and release more chemicals

Question 7

Describe the ABO and Rh blood groups. Explain the antigen/antibody basis of transfusion reactions.