1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mademuasel [1]
3 years ago
15

Which molecules of the adaptive defense system provide humoral immunity by circulating freely in the blood and lymph, where they

bind to extracellular antigens and inactivate them and mark them for destruction?
Biology
1 answer:
alisha [4.7K]3 years ago
5 0

Answer:

Adaptive immune defense system consists of lymphocytes like B-lymphocytes and T- lymphocytes. B-lymphocytes provides humoral immunity while T- lymphocytes provide cell-mediated immunity to the body.

99% of lymphocytes circulate freely in the blood and lymph. B lymphocytes differentiate into plasma B cells and B memory cells when interact with antigen presented by T helper cells.  

Then plasma cells secrete antibodies in the circulation which binds to extracellular antigens through antigen-binding site. Then the bounded antigen is recognized by receptors present on phagocytic cells. This receptor binds the Fc region of antigen bounded antibody and destroy the antigen by phagocytosis.

You might be interested in
A group of parts that work together is called a
svetlana [45]
I believe it is a system
3 0
3 years ago
Read 2 more answers
In stressful situations, the sympathetic nervous system ________ the arteries of the circulatory system and ________ the pupils
sukhopar [10]
The correct terms to fill in the blanks would be contracts and dilates. In stressful situations, the sympathetic nervous system contracts the arteries of the circulatory system resulting to the dilation of the pupils of the eyes. Also, during these situations, the blood sugar levels are raised since the hormones for stress kick in to combat the stress which in turn raises the blood sugar. 
4 0
3 years ago
_____ is the best example of a sensitive period.
Katarina [22]

The best example that illustrates a sensitive period is letter b, where the child tries to learn in speaking a second language because this is considered to be a sensitive period in which is the period for a development of new opportunities that a child could learn in which learning to speak a second language is considered to be a sensitive period.  

4 0
3 years ago
2.2.3
Oliga [24]

Answer:

there could have been low production

7 0
2 years ago
21) How long can penguins hold their breath while hunting?
Alinara [238K]

Answer:

the emperor penguin can hold their breath for 20 minutes

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • What could be some weakness with using a test cross to determine Fred’s genotype?
    5·1 answer
  • How do the HIV/Aids pandemic statistics vary around the world?
    7·1 answer
  • Which example best represents the adhesion, cohesion, and surface tension of water?
    6·2 answers
  • What occurs when a ball falls from a balcony
    9·1 answer
  • Puntos gratis pero
    12·2 answers
  • 12 of 12Items
    10·1 answer
  • HELPP! ILL MARK Y PU BRAINLY!
    11·2 answers
  • How does cell theory help scientists to research more efficiently?
    8·1 answer
  • True or False: the enzyme that scientists have found to break down the sugar chains of
    7·1 answer
  • (ii) Describe an experiment he could carry out to show that auxin causes bending of a<br> shoot.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!