The major function of a receptor is to
a. control the autonomic functions of the body.
b. stabilize the internal environment to achieve homeostasis.
c. produce responses to the various stimuli the body receives.
d. give organisms awareness and sensitivity to their environment by converting a stimulus to
an action potential (nerve impulse).
e. interpret the sensations it receives from the environment
D
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Polar covalent bonds:
A. can result in molecules having an electric dipole moment. B. can result in molecules having separated positive and negative charges. C. will not be present in nonpolar molecules. D. occur when the electrons in the bond are shared between the atoms but biased toward one atom in the bond. E. All of these choices are correct.
The atrioventricular valves are closed when the
A) right atrium is contracting. B) P wave of an electrocardiogram appears. C) heart is completely relaxed. D) ventricles contract. E) ventricles are relaxed.
Symptoms of an allergic reaction such as increased secretion of mucus, swelling, and pain are due to the release of ________ from mast cells
Fill in the blank(s) with correct word
Zooplankton are heterotrophs.
Answer the following statement true (T) or false (F)