BIOL 2402: Exam 3

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1

The type of circulatory shock due to abnormal expansion of blood vessels and rapid drop in blood pressure is .

vascular

2

The term ductus venosus refers to .

a special fetal vessel that allows umbilical blood to by pass the liver

3

What does NOT involve tissue perfusion?

blood clotting

4

The velocity or blood flow is .

slowest in the capillaries because the total cross sectional area is the greatest

5

A patient with essential hypertension might have pressures of 200/120 mm Hg. This hypertensive state could NOT result in what?

decreased size of the heart muscle

6

What would NOT be classified as a lymphatic structure?

pancreas

7

The thymus is most active during ?

childhood

8

Which lymphatic structure drains lymph from the right upper limb and the ride side of the head and thorax?

right lymphatic duct

9

Antibodies that act against a particular foreign substance are released by .

plasma cells

10

Lymph leaves a lymph node via .

efferent lymphatic vessels

11

What is associated with passive immunity?

passage of IgG antibodies from a pregnant mother to her fetus

12

What is not a type of T-cell?

antigens

13

B lymphocytes develop immunocompetence in the .

bone marrow

14

The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called .

chemotaxis

15

What is the correct sequence of events in phagocytosis?

chemotaxis, adherence, ingestion, digestion, killing.

16

What is NOT a role of activated complement?

prevention of immediate hypersensitivity reactions.

17

Interferons .

interfere with viral replication within cells

18

What determines what specific foreign substances our adaptive immune system will be able to recognize and resist?

our genes

19

Regulatory T cells .

may function in preventing autoimmune reactions

20

Tissue grafts:

isografts are between identical twins

21

What does NOT describe antigens?

antigens only come from microbes

22

B cells respond to the initial antigen challenge by .

producing progeny cells that include plasma cells and memory cells.

23

T-cell activation requires .

antigen binding and co-stimulation

24

Fever .

production is regulated by chemicals that reset the body's thermostat to a higher setting.

25

What cell is the most critical cell in immunity?

helper T cell

26

What immunoglobulin class is attached to the external surface of B cells and acts as an antigen receptor of the B cell?

IgD

27

The antibody that becomes bound ti mast cells and basophils and causes the cells to release histamine and other chemicals is .

IgE