Human Anatomy and Physiology Answers

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Macrophages

 A. carry class II major histocompatibility complex (MHC) antigens on their plasma membrane. B. secrete tumour necrosis factor (TNF).

 C. are activated by interferon-gamma (IFN-γ). 

D. are antigen presenting cells. 

E. secrete IgG.

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Interferon-gamma (IFN-γ)

 A. activates macrophages. 

B. is secreted by natural killer (NK) cells. 

C. lyse virus-infected cells.

 D. is secreted by B-cells.

 E. is an opsonin.

Macrophages

 A. carry class II major histocompatibility complex (MHC) antigens on their plasma membrane. B. secrete tumour necrosis factor (TNF).

 C. are activated by interferon-gamma (IFN-γ). 

D. are antigen presenting cells. 

E. secrete IgG.

Good day please select all correct options, thanks

In an HIV-positive person, body fluids that contain a high concentration of the virus include

 A. blood.          

  B. semen.        

  C. saliva.           

 D. breast milk.

 E. cerebrospinal fluid.

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B lymphocytes            

 A. are part of the innate immune system.   

 B. secrete immunoglobulins.        

 C. are cytotoxic.  

 D. are stimulated by CD4 T lymphocytes. 

E. become plasma cells.

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CD4 T-lymphocytes:

 A. are helper cells

 B. are activated by major histocompatibility complex (MHC) class I molecules. 

C. inhibit activation of B cells. 

D. stimulate B cells to switch the class of immunoglobulin expressed. 

E. are part of the innate immune response.

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In a research study, a pharmaceutical company will be testing the effectiveness of a possible new vaccine for the Coronavirus. During this study, one group receives the actual medication while the other receives a syringe with saline solution (no medication). The group that receives the syringe without any medication is referred to as 

In a research study, a pharmaceutical company will be testing the effectiveness of a possible new vaccine for the Coronavirus. During this study, one group receives the actual medication while the other receives a syringe with saline solution (no medication). The group that receives the syringe without any medication is referred to as

Which muscles the most inferior border of the axillary fossa?