Communication signals are usually _____
a. intraspecific
b. interspecific
c. not helpful to the receiver
d. visual
e. auditory
ANSWER: a
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Which of these proteins identify a cell as a target cell for a hormone?
a. receptors b. neuromodulators c. cyclic AMP d. response proteins e. neurotransmitters
In order to use the energy stored in sugars, what must the cells must first transfer it to? How does the energy transfer occur?
What will be an ideal response?
The sympathetic and parasympathetic divisions of the autonomic nervous system tend to have opposing actions on target organs.
Answer the following statement true (T) or false (F)
The worldwide, primary viral cause of morbidity and mortality from diarrhea is
A. Rhinoviruses. B. Caliciviruses. C. Influenza viruses. D. Rotavirus. E. Coxsackie viruses.