Question 1

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Enhance the development of antigen-stimulated B cells into antibody-secreting cells.

Accepted Answer

Helper T cells enhance the development of antigen-stimulated B cells into antibody-secreting cells through the secretion of cytokines. Cytotoxic T cells are involved in destroying infected or abnormal cells, while regulatory T cells help to control and prevent excessive immune responses. Therefore, choices A, C, D, and E are incorrect.

Question 2

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Destroy host cells bearing foreign antigen.

Accepted Answer

Cytotoxic T cells are responsible for recognizing and destroying host cells that are infected with pathogens or have become cancerous. This is known as cell-mediated immunity. Helper T cells assist in activating and coordinating other immune cells, while regulatory T cells help to control and regulate the immune response. Neither of these cell types directly destroy infected host cells.

Question 3

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Are attacked by AIDS virus.

Accepted Answer

The AIDS virus, HIV, primarily targets and attacks helper T cells, which are crucial for the immune response.

Question 4

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Secrete B-cell growth factor.

Accepted Answer

Helper T cells secrete B-cell growth factor, which promotes the growth and proliferation of B cells.

Question 5

Match defense molecule with correct characteristic.
-Stimulates histamine release by mast cells

Accepted Answer

The answer of Match defense molecule with correct characteristic.
-Stimulates histamine...

Question 6

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Recognize class I MHC glycoproteins.

Accepted Answer

Cytotoxic T cells recognize and respond to cells displaying class I MHC molecules, which present endogenous antigens. Helper T cells, regulatory T cells or both do not recognize class I MHC molecules.

Question 7

Match defense molecule with correct characteristic.
-Potent anti-inflammatory drug(s).

Accepted Answer

Glucocorticoids are potent anti-inflammatory drugs commonly used to treat conditions such as asthma and arthritis.

Answer: D
 TNF (tumor necrosis factor) is a cytokine that plays a role in inflammation and autoimmune diseases. Drugs that target TNF, such as infliximab and etanercept, are effective anti-inflammatory treatments.

Answer: H
 Interferons are signaling molecules that play a key role in immune responses to viral infections. They have also been used as a treatment for certain cancers and autoimmune diseases.

Note: None of the other choices listed are known for their potent anti-inflammatory properties.

Question 8

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Are believed to play a role in tolerance.

Accepted Answer

Regulatory T cells, also known as Tregs, are a unique subset of T cells that are believed to play a role in maintaining self-tolerance and preventing autoimmunity. They can suppress the activation and proliferation of other immune cells, including both cytotoxic T cells and helper T cells, and help to maintain a balance between the immune system's ability to fight infections and its tendency to attack the body's own tissues. While helper T cells can also play a role in regulating the immune response, regulatory T cells are specifically specialized for this function.

Question 9

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Secrete macrophage-migration inhibition factor.

Accepted Answer

Helper T cells secrete cytokines, including macrophage-migration inhibition factor, which aid in the activation and proliferation of other immune cells.

Question 10

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Release perforin.

Accepted Answer

Perforin is a protein that is released by cytotoxic T cells to induce apoptosis (cell death) in infected or abnormal cells. Helper T cells and regulatory T cells do not release perforin.

Question 11

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Recognize class II MHC glycoproteins.

Accepted Answer

Helper T cells recognize class II MHC glycoproteins, which are present on antigen-presenting cells such as dendritic cells, macrophages, and B cells. Cytotoxic T cells recognize class I MHC glycoproteins on the surface of infected cells, while regulatory T cells play a role in maintaining tolerance to self-antigens. Class II MHC recognition is specific to helper T cells.

Question 12

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Suppress both B-cell and T-cell activity.

Accepted Answer

Regulatory T cells, also known as Tregs, can suppress the activity of both B-cells and other T-cells. In fact, suppression of immune activity is their primary function. Cytotoxic T cells are mainly involved in killing infected or cancerous cells, while helper T cells aid in the activation and proliferation of other immune cells. Thus, choices A, B, D, and E do not fit the description of suppressing both B-cell and T-cell activity.

Question 13

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code.
-Antibodies produced by a source other than one's own body.

Accepted Answer

Antibodies produced by a source other than one's own body refers to passive immunity, where an individual receives pre-made antibodies from another source, such as maternal antibodies passed from mother to baby or through blood transfusions. Active immunity, on the other hand, involves the body producing its own antibodies in response to an antigen.

Question 14

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Are the most numerous of the T cells.

Accepted Answer

Helper T cells are the most numerous type of T cell.

Question 15

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Secrete interleukin 2.

Accepted Answer

Helper T cells secrete interleukin 2, which is crucial for the activation and proliferation of other immune cells.

Question 16

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Serve to limit immune reactions in a check and balance relationship with the other lymphocytes.

Accepted Answer

Regulatory T cells, also known as Tregs, serve to limit immune reactions and maintain immune homeostasis. They play a critical role in preventing autoimmunity and excessive inflammation by suppressing the activity of other immune cells, including helper and cytotoxic T cells.

Question 17

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code.
-Exposure to antigen required for immunity to develop.

Accepted Answer

Active immunity requires exposure to an antigen for the immune response to occur, while passive immunity involves the transfer of antibodies from another individual, bypassing the need for exposure to the antigen.

Question 18

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code.
-Often confers long-lasting immunity.

Accepted Answer

Active immunity often confers long-lasting immunity because it involves the stimulation of the body's own immune system to produce memory cells and antibodies that can provide protection against future infections. This long-lasting immunity is the result of the body's ability to remember the pathogen and quickly produce a strong immune response upon re-exposure to the same pathogen. In contrast, passive immunity provides temporary protection and does not confer long-lasting immunity because it involves the transfer of pre-formed antibodies from another source (such as breast milk or immune serum).

Question 19

Match defense molecule with correct characteristic.
-Produced by plasma cells.

Accepted Answer

Antibodies are specifically produced by plasma cells in response to an antigen.

Answer: H
 Interferons are signaling molecules produced and released by cells in response to viral infections. They stimulate neighboring cells to produce antiviral proteins to help defend against the virus.

Question 20

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code:
-Are called regulatory T cells.

Accepted Answer

The answer of Indicate which type of T cell is...

Quiz 11: The Blood and Body Defenses

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Enhance the development of antigen-stimulated B cells into antibody-secreting cells.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Destroy host cells bearing foreign antigen.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Are attacked by AIDS virus.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Secrete B-cell growth factor.

Match defense molecule with correct characteristic. -Stimulates histamine release by mast cells

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Recognize class I MHC glycoproteins.

Match defense molecule with correct characteristic. -Potent anti-inflammatory drug(s) .

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Are believed to play a role in tolerance.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Secrete macrophage-migration inhibition factor.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Release perforin.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Recognize class II MHC glycoproteins.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Suppress both B-cell and T-cell activity.

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code. -Antibodies produced by a source other than one's own body.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Are the most numerous of the T cells.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Secrete interleukin 2.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Serve to limit immune reactions in a check and balance relationship with the other lymphocytes.

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code. -Exposure to antigen required for immunity to develop.

Indicate whether the characteristic applies to active immunity or passive immunity by writing the appropriate letter in the blank using the following answer code. -Often confers long-lasting immunity.

Match defense molecule with correct characteristic. -Produced by plasma cells.

Indicate which type of T cell is being described by writing the appropriate letter in the blank using the following answer code: -Are called regulatory T cells.