New And Precise The Lymphatic System
a) To serve as an exchange vessels fir nutrients and wastes between the blood and the tissues
b) To house lymphocytes involved in immunity
c) To transport lipids and lipid soluble vitamins from the gastrointestinal tract to the blood(through the lacteals)
d) To drain excess interstitial fluid and return it to the blood
2. Which mechanism does not contribute to lymph transport?
a) smooth muscle contraction
b) arterial pulsations
c) Increased physical activity
d) skeletal muscle activity
e) Two-way valves
3. The lymphatic capillaries
a) Act to move lymph away from the heart
b) Are more permeable than the blood capillaries
c) Are as permeable as the blood capillaries
d) Absorb blood and return it to the lymph
4. Lymphedema occurs
a) When blocked lymph returns results in the accumulation of lymph fluid and decreased fluid return to the blood circulation
b) When fluid accumulated in the tissues because of decreased capillary permeability
c) When decreased interstitial fluid is present because of faulty lymphatic valves
5. Which statement is wrong?
a) The spleen acts to filter blood and store blood platelets
b) The lymph nodes are physically located for immune defense
c) The lymph nodes, the thymus, and the tonsils are all filters lymph
d) The mucocsa-assoicated lymphatic tissue (MALT) function in immunity
6. Which is NOT a role of the lymph nodes?
a) Activate immunity in response to antigens
b) Filter lymph
c) Produce lymphocytes
d) Produce lymph fluid and cerebrospinal fluid
a) Decreases the metabolic rate to slow bacterial growth
b) Can be beneficial when the body temperature is greater than 5 degrees above normal since enzyme activity is compromised
c) Occurs when pyrogens reset the hypothalamic thermostat to a lower setting
d) Maybe helpful when the body temperature is slightly elevated enhancing metabolism and body repair
8. Which is NOT a mechanism of the innate (nonspecific) defense system?
a) Sebum and perspiration on the skin
b) Natural killer cells
c) Intact mucous membranes
d) Stomach acid
e) Antibody production by plasma cells
9. Which DOES NOT occur during the process of inflammation?
a) Leukocyic chemicals
b) Phagocytic mobilization
c) Release of histamine, kinins, and prostaglandins
d) Increased capillary permeability
e) Arteriolar vasoconstriction
10. The process by which neutrophils and macrophages are attracted to an area of inflammation is
11. Which is NOT an inflammatory chemical?
12. The cardinal signs of inflammation include redness (rubor), heat (calor), swelling (tumor), and pain (dolor). What chemical mediators are released during inflammation (in response to tissue injury)? What occurs to cause “tumor” and “dolor”? What is the purpose of the inflammatory response?
13. Passive humoral immunity
a) Occurs with a booster vaccine
b) Involves an infusion of inactive viruses
c) Temporary immunity involving donates antibodies
d) Provides long-lasting immune protection
14. T lymphocytes that help in both cellular and humoral immunity are
a) Helper T cells
b) Memory B cells
c) Cytotoxic cells
d) Phagocytic T cells
e) Natural Killer T cells
15. Which statement about humoral immunity is wrong?
a) Immunological memory is produced by memory B cells
b) Clonal selection of a cytotoxic T cell occurs
c) Helper T cells function in B cell activation
d) Gamma globulins are produced
e) Plasma cells produce antibodies
16. Which statement about immunity is correct?
a) Plasma B cells provide immunological memory
b) Helper T cells activate cytotoxic T-cells
c) Cell-mediated immunity involves agglutination and neutralization
d) Cyokinetic B-cells can directly attack foreign cells
e) T-lymphocytes are specifically sensitized against an antibody
17. Cellar immunity is carried out by _______, while humoral immunity is mainly carried out by_____.
b) T lymphocytes/ B lymphocytes
c) B lymphocytes/ T lymphocytes
d) Antibodies/ Antigens
e) Antibodies/Sensitized Phagocytes
18. Artificially acquired active immunity results from
a) Immunoglobulin shot
b) Chickenpox vaccination
c) Anti-venom injection
d) Recovery from influenza
e) Transfer of antibodies from a mother to her fetus
19. According to an old wives tale, “when you already have a cold, you can’t get another cold.” How do you explain this?
a) Virally-infected cells produce interferon, Interferon protects uninfected cells against another viral infection
b) Complement produced by the immune response to the first cold protects against the second cold
c) All colds are cause by the same virus so you develop immunity to colds over time
d) Histamine release in response to the first cold over time
20. What is an MHC protein and why is it significant immunological? (What does MHC stand for?)