Describe the body's primary and secondary immune responses
What will be an ideal response?
The primary response is the body's response to the first exposure to a particular antigen. During this time, the body does not have a large supply of memory cells able to recognize this antigen; therefore, the antigen may have time to cause ill effects before being eradicated. After eradication of the antigen, the body retains a large supply of memory cells that are able to recognize this antigen and can thereby launch a swifter and more efficient secondary response upon subsequent exposure to the same antigen. During the secondary response, the antigen can be eradicated so swiftly that no ill effects may develop.
You might also like to view...
Preganglionic parasympathetic fibers synapse on neurons of ________ ganglia.
Fill in the blank(s) with the appropriate word(s).
What is the part of the egg where the sperm enters the egg cell to allow fertilization to occur?
a. chalaza c. albumin b. yolk d. germinal disc
One of the effects of the growth hormone is the control of fat metabolism
Indicate whether the statement is true or false
A fat cell responds to the presence of the hormone epinephrine by increasing cytosolic cyclic AMP production, which leads to the catabolism of both glycogen and fat. What is the most likely explanation for this phenomenon?
A. Epinephrine is binding to two types of receptors in the plasma membrane. B. The activated receptor complex stimulates production of two different second messengers. C. Cyclic AMP directly activates enzymes that catabolize glycogen and fat. D. Cyclic AMP-dependent protein kinase activates two kinds of enzymes.