10.6 Lymphatic System

Question 1

What is the difference between Antigen & Antibody?

Answer 1

Antibody:
-A protein produced in response to an antigen that inactivates the harmful cell
Antigen:
Protein or polysaccharide “name tag” on a cell that brings about an immune response

Question 2

What is Lymphatic System?

Answer 2

• returns tissue fluid to the circulatory system
• One way flow from lymph tissue back to blood
• never has RBC
• Helps control fluid balance

Question 3

What is macrophage

Answer 3

Engulfs foreign particles (bacteria) by phagocytosis

Question 4

Name the differences between B-lymphocyte and T-lymphocyte?

Answer 4

T-lymphocyte:
-WBC that directly attack foreign cells that bear antigens
-“Killer T-cells”
B-lymphocyte:
-WBC that produces antibody-producing plasma cells in the presence of a specific antigen.

Question 5

What does a lymph node do

Answer 5

Contains spaces filled with WBC (lymphocytes and macrophages to filter and clean the lymph
-Clustered at armpits, groin, and neck

Question 6

How are Lymph vein and lymph capillary different?

Answer 6

Lymph capillary:
-Absorbs excess fluid from tissue that has leaked out of blood capillaries
-takes up any waste left in capillary beds
Lymph vein:
-Collect fluid from the lymph capillaries and returns it to blood in subclavian veins

Question 7

What is the Thymus function

Answer 7

A gland that is the site of maturation of T-lymphocytes (a type of WBC)

Question 8

Define a spleens function

Answer 8

“Blood reservoir”

-contains RBC and WBC to clean the blood

Question 9

On a capillary bed, describe what happening at the arteriole end

Answer 9

• Blood pressure is higher than osmotic pressure

- Water moves out of blood into tissues

Question 10

On a capillary bed, describe whats happening at the venule end (beginning)

Answer 10

• Blood pressure is lower than osmotic pressure

- MOST water moves back into blood from tissues

Question 11

How does blood move through capillaries from arteriole to venule

Answer 11

• (oxygen, glucose,A.A, fatty acids, glycerol leave the blood) to tissues
• CO2 + other wastes also enter blood from tissues

Question 12

What is osmotic pressure (OP)

Answer 12

-force generated by presence of salts + plasma proteins in blood that pulls water back into blood

Question 13

edema (define and cause)

Answer 13

• localized swelling due to accumulation of fluid in tissue

- usually bc of low plasma proteins

Question 14

what is a stroke

Answer 14

when a portion of the brain dies due to lack of oxygen

Question 15

what is atherosclerosis

Answer 15

“hardening of the arteries”