Lymphatic, Immune, and Respiratory

All of the following are true of the thymus gland except

• lies in the anterior mediastinum

• involutes after puberty

• activates B cells

• produces T cells

Which of the following is not a secondary lymphoid tissue or organ?

• spleen

• tonsils

• MALT

• thymus

The cells directly responsible for cellular immunity are

• dendritic

• helper T

• plasma

• cytotoxic T

Which of the following would trigger an inflammatory response

• T cells release interferon.

• mast cells release histamine and heparin.

• red blood cells release pyrogens.

• neutrophils phagocytize bacteria.

Tags

NGSS.HS-LS1-3

Cytokines that make a cell and its neighbors resistant to virus infection are called

• interferons

• complement

• interleukins

• immunogolbulins

Immunity that results from exposure to an antigen in the environment is called ________ immunity.

• naturally acquired passive

• artificially acquired active

• artificially acquired passive

• naturally acquired active

The following are steps in the cell-mediated immune response. What is the correct sequence for these steps?

 

1. Several cycles of mitosis occur.

2. Antigen is engulfed and presented by a macrophage.

3. Cytotoxic T cells migrate to focus of infection.

4. T cells with specific receptors recognize the antigen.

5. T cells differentiate into cytotoxic T cells or T memory cells.

6. Cytotoxic T cells release perforin and/or lymphotoxin.

• 3,2,1,4,5,6

• 2,4,1,5,3,6

• 4,1,5,3,6,2

• 5,4,2,1,3,6

Anti-A and Anti-B blood typing antibodies are of which class?

• IgG

• IgE

• IgM

• IgD

Inhaling through the nostrils is preferred over the mouth because

• filters and moistens inhaled air

• bacteria wont be inhaled from the oral cavity

• less resistance to air flow

• combines with olfaction

The complement system works closely with

• interferons

• antibodies

• pyrogens

• phagocytes