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 153 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?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

The shoot apical meristem and stem cells. The shoot apical meristem and stem cells.
Different Types of Cells Different Types of Cells
Evolution and Natural selection shapes organisms and diversity Evolution and Natural selection shapes organisms and diversity
Normal Red Blood Cells Normal Red Blood Cells
Laboratory-Grown Stem Cells Laboratory-Grown Stem Cells
Cytoplasmic Division in Animal Cells Cytoplasmic Division in Animal Cells
Video: Glomerular filtrate rate: pressures that affect GFR, NFP & GFR and blood composition

For a complete list of videos, visit our video library