Which substance, secreted by the stomach, destroys most microorganisms that enter the body in the food, and activates pepsin?
A. Bicarbonate ions
B. Hydrochloric acid
C. Amylase
D. Trypsin
E. Intrinsic factor
Answer: B
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The section shown in (c) results from cutting through a _____ plane extending through the brain?
a) frontal b) sagittal c) oblique d) midsagittal e) transverse
Which neurotransmitter is released by the preganglionic neuron at the autonomic ganglion in the diagram?
a) Norepinephrine b) Acetylcholine c) Epinephrine d) Dopamine e) Serotonin
Waking up from a deep sleep, the homeowner could hear a burglar breaking the panes in his sliding glass door. What hormone made him have an increased heart rate, increased blood pressure, sweating, and a dry mouth?
A) Estrogen B) Adrenaline C) Dopamine D) Insulin
What structure protects the pituitary gland?
A. The concha B. The cribriform plate C. The sella turcica D. The ethmoid bone