1. which endocrine gland is responsible for the release of a hormone that stimulates t-cell development
and proper immune response in children?
a. adrenal glands
b. testes
c. thymus
d. pancreas
2. which statement accurately describes the function of a hormone produced by the adrenal glands?
a. epinephrine widens the air passageways in the lungs.
b. cortisol causes the heart rate and blood pressure to rise.
c. aldosterone control metabolism of carbohydrates, fats, and proteins.
d. norepinephrine regulates blood volume and pressure.

The cells that are produced in the thymus are the T-lymphocytes or Tcells. The thymus serves as a production and  maturation site for T cells.

When a normal cell of the body is invaded and infected by a virus, both the virus and the cell it has invaded have to be killed. The infected cell takes some of fragments of  the virus, known as antigen fragments, and displays them on its cell membrane almost like waving a flag. Special T cells called cytotoxic T cells  recognize this "flags" and bind to the infected cell.  The T cells then release some substances one of which is called perforin, on the infected cell,  which poke holes on the cell membrane causing it and the virus within to die.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms