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 163 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?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Modifications that occur at the ends of mRNA in eukaryotic cells. Modifications that occur at the ends of mRNA in eukaryotic cells.
Prokaryotic cells are have a relatively simple structure Prokaryotic cells are have a relatively simple structure
Transduction Apparatus in Hair Cells Transduction Apparatus in Hair Cells
Plasma insulin binds to receptors on target cells to enter the cells, which starts actions that lead ... Plasma insulin binds to receptors on target cells to enter the cells, which starts actions that lead ...
Natural selection acts on genetic variation Natural selection acts on genetic variation
Anemic Red Blood Cells Anemic Red Blood Cells
Video: Introduction to Insulin

For a complete list of videos, visit our video library