Question

question 9 2.5 pts
--------------------- is a substance that provokes an immune response in specific lymphocytes

○ antibody
○ toxicity
○ antigen
○ killer cells

question 10 2.5 pts
haptens are too small by themselves to elicit an immune response

○ true
○ false

Explanation:

Question 9

To solve this, we analyze each option:

• Antibody: A protein produced in response to an antigen, not the substance provoking the response.
• Toxicity: Refers to the degree to which a substance is toxic, not related to immune response provocation.
• Antigen: Defined as a substance that provokes an immune response in specific lymphocytes.
• Killer cells: Are a type of cell, not a substance that provokes the response.

Haptens are small molecules that, by themselves, are too small to elicit an immune response. They need to bind to a larger carrier molecule to become immunogenic and provoke an immune response. So the statement is True.

Answer:

C. antigen

Question 10