Some neurons in the vagus nerve have synaptic connections to sinoatrial (pacemaker) cells in the heart. These neurons secrete acetylcholine, which ultimately results in a decreased heart rate. This is an example of
A. endocrine control
B. exocrine control
C. hormonal control
D. neural control
E. paracrine control
D
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Compounds are:
a. pure substances b. made up of only one type of atom c. made up of two or more different types of atoms d. both A and B above
Pernicious anemia develops if there is a vitamin ________ deficiency.
A. C B. D C. B6 D. B12
The kidneys do not play a vital role in regulating:
a. blood glucose level b. pH balance c. water balance d. electrolyte balance
The four processes involved in heat exchange with the environment are __________.
a. physiological, behavioral, generational, and acclimatization b. radiation, conduction, conviction, and evaporation c. sensible, insensible, heat loss, and heat gain d. thermogenesis, dynamic action, pyrexia, and thermolysis