Author Question: B cells are primarily activated by the activities of A) antigens. B) antibodies. C) helper T ... (Read 73 times)

tiara099 · **on:** Feb 28, 2019

B cells are primarily activated by the activities of
A) antigens.
B) antibodies.
C) helper T cells.
D) macrophages.
E) plasma cells.

Question 2

What are the four types of sensory receptors for the general senses? What is the nature of the stimuli that excite each type?

jrpg123456 · **Reply #1 on:** Feb 28, 2019

Answer to Question 1

C

Answer to Question 2

(1 ) Nociceptors: a variety of stimuli associated with tissue damage; (2 ) thermoreceptors: respond to changes in temperature; (3 ) mechanoreceptors: stimulated by physical distortion, contact, or pressure; and (4 ) chemoreceptors: monitor the presence of specific chemical substances.