When acetylcholine binds to receptors at the motor end plate, the muscle membrane becomes
A) More permeable to sodium ions.
B) Less permeable to sodium ions.
C) More permeable to potassium ions.
D) Less permeable to potassium ions.
E) Repolarized
A) More permeable to sodium ions.
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The functions of saliva include
A. moistening, binding and dissolving food particles; beginning chemical digestion of carbohydrates; and cleansing the teeth and mouth. B. moistening, binding and building up food particles; beginning mechanical digestion of fats; and cleansing the teeth and mouth. C. moistening, binding and dissolving food particles; beginning chemical digestion of proteins; and cleansing the esophagus. D. moistening, binding and building up food particles; beginning chemical digestion of carbohydrates; and cleansing the esophagus.
An adolescent grows in height mainly because of events that occur in the ________ of the skeleton.
A. metaphyses B. epicondyles C. hematopoietic tissue D. medullary cavities E. endosteum
Gastric juice consists entirely of water and hydrochloric acid
Indicate whether the statement is true or false
Some neurons in the vagus nerve have synaptic connections to sinoatrial cells (pacemaker) in the heart. These neurons secrete acetylcholine, which ultimately results in a decreased heart rate. This is an example of
A. neural control. B. endocrine control. C. hormonal control. D. exocrine control. E. paracrine control.