Question

QUESTION 3

1. Which of the following cell types perform their function using perforin and granzymes? (select all that apply)

   	A.	Cytotoxic T-lymphocytes
   	B.	Monocytes
   	C.	Eosinophils
   	D.	Natural Killer Cells
   	E.	Basophils
   	F.	Memory T-lymphocytes

1 points   

QUESTION 4

1. Which of the following statements regarding vaccines is FALSE?

   	A.	They provide a type of artificially acquired active immunity.
   	B.	Increased compliance in vaccinations will increase herd immunity and decrease disease incidence
   	C.	Vaccines have been proven to cause autism
   	D.	The diseases that vaccines provide immunity against are still present in the environment

1 points   

QUESTION 5

1. Which of the following statements regarding the mucociliary escalator is FALSE?

   	A.	It helps prevent dust and debris from getting into our alveoli
   	B.	Cilia are not required for the mucociliary escalator
   	C.	Mucous traps harmful substances and allows us to clear them from our respiratory tract
   	D.	Can be found only within the conducting zone of our respiratory system

Answer 1

3.A, D

Perforins and granzymes are the substances capable of causing holes in the cell membranes of foreign cells and can lead to death of these cells and found in cytotoxic T cells and NK cells

4.C

Vaccines don't cause autism

They provide artificial active immunity and high herd immunity can be achieved by immunizing most individuals in the herd..  

Vaccines are prepared against those diseases that still present in the environment like HPV vaccine, hepatitis B vaccine

5.B.

Cilia are required for mucociliary escalator.  

It prevents dust and debris from entering into alveoli and helps the to clear off from the respiratory tract. .. These are found only in the conducting zone of the respiratory tract