The lamina propria and mucous epithelium are components of the
A) serosa.
B) submucosa.
C) muscularis mucosa.
D) adventitia.
E) mucosa.
E) mucosa.
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During the cephalic phase of gastric stimulation, which of the following does NOT occur?
A. HCl is secreted into the gastric lumen. B. Pepsinogen is secreted into the gastric lumen. C. Seeing, smelling, and/or tasting food reflexively increase(s) gastric acid secretion. D. Parasympathetic stimulation of secretory cells in the gastric mucosa occurs. E. Gastrin is secreted into the gastric lumen.
Answer the following statements true (T) or false (F)
1. One function of the alveoli is to filter out dirt and pollen before it reaches the lung. 2. The gallbladder is physically attached to the digestive system but has no role in digestion. 3. The sperm and ova are similar in that they both are sex cells. 4. The organs of the muscle system are unique because they are made of only one type of tissue. 5. A system is one level of organization higher than a tissue.
Which is not a membrane-bound organelle?
A. Lysosome B. Peroxisome C. Golgi apparatus D. Endoplasmic reticulum E. All of the choices are membrane-bound organelles.
What event must occur in the postsynaptic cell before it generates an action potential?
A) The postsynaptic cell must fuse to the presynaptic cell membrane to generate an action potential. B) The postsynaptic cell receive passage of ions through the gap junctions between the two cells in order to generate an action potential. C) The postsynaptic cell must release neurotransmitters to generate an action potential. D) The postsynaptic cell membrane must reach threshold to generate an action potential. E) The postsynaptic cell membrane must hyperpolarize to generate an action potential.