This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is responsible for initiating clonal selection? a. T cells b. B cells c. ... (Read 56 times)

geoffrey

  • Hero Member
  • *****
  • Posts: 880
on: Jun 25, 2018
Which of the following is responsible for initiating clonal selection?
 
  a. T cells
  b. B cells
  c. Antigens
  d. Lymphocytes

Question 2

An experiment is designed to determine specific cell types involved in cell-mediated immune re-sponse. The experimenter is interested in finding cells that attack cells that have specific antigens. Which cells should be isolated?
 
  a. Lymphokine-producing cells
  b. T-cytotoxic cells
  c. Helper T cells
  d. Macrophages


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jsm54321

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: C
The lymphocytes remain dormant until an antigen initiates clonal selection. T cells do not initiate clonal selection. B cells are antibodies. Lymphocytes are released into the circulation as immature cells that react with antigens.

Answer to Question 2

ANS: B
Cell-mediated immunity is driven by T-cytotoxic (Tc) cells that attack antigens directly and de-stroy cells that bear foreign antigens. Lymphokine-producing cells, helper T cells, and macro-phages do not attack antigens directly and destroy cells that bear foreign antigens.


geoffrey

  • Hero Member
  • *****
  • Posts: 880
Reply #2 on: Jun 25, 2018
Correct answers!


jsm54321

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jun 25, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Sickled and normal red blood cells Sickled and normal red blood cells
Prokaryotic and Eukaryotic Cells Prokaryotic and Eukaryotic Cells
The dystrophin glycoprotein complex (DGC) in skeletal muscle cells The dystrophin glycoprotein complex (DGC) in skeletal muscle cells
Schematic diagram showing polyclonal response by B cells against linear epitopes. Schematic diagram showing polyclonal response by B cells against linear epitopes.
The clonal selection theory of the adaptive immune response The clonal selection theory of the adaptive immune response
Video: Appendicitis Animation

For a complete list of videos, visit our video library