What substance lines the lungs, making them easier to inflate?
What will be an ideal response?
Surfactant.
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Gastrin is released when chyme enters the duodenum.
Answer the following statement true (T) or false (F)
In the plasma, the quantity of oxygen in solution is ________
A) only about 1.5% of the oxygen carried in blood B) not present except where it is combined with carrier molecules C) about equal to the oxygen combined with hemoglobin D) greater than the oxygen combined with hemoglobin
The cytoplasm of the neuromuscular synaptic terminal contains vesicles filled with molecules of the neurotransmitter
A) epinephrine. B) norepinephrine. C) acetylcholine. D) antidiuretic hormone. E) acetylcholinesterase.
In which region(s) of the GI tract do peristaltic contractions occur?
A. the small intestine B. the large intestine C. the stomach D. the esophagus E. All of these options are correct.