In the simplest case, endocrine activity may be controlled by changes in the extracellular fluid composition called ________ stimuli.
A) hormonal
B) cellular
C) neural
D) membrane
E) humoral

Question

Quizplus · Accepted Answer

"Humoral stimuli" refer to changes in the extracellular fluid composition, such as hormone levels, glucose levels, and electrolyte concentrations. Therefore, the best choice is E. Hormonal stimuli refer specifically to the presence or absence of certain hormones, cellular stimuli refer to signals or interactions between cells, neural stimuli refer to signals from the nervous system, and membrane stimuli do not directly relate to endocrine activity.

In the Simplest Case, Endocrine Activity May Be Controlled by Changes