Explain the effect of the parasympathetic nervous system on cardiac muscle cells
What will be an ideal response?
Preganglionic parasympathetic neurons travel to the heart via the vagus nerves (CN X) and stimulate the postganglionic parasympathetic neurons to reduce both the heart rate and the force of contraction. These actions antagonize the sympathetic nervous system and lower blood pressure.
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A) it is likely to cause severe internal bleeding B) the large intestine will no longer be able to receive digested material from the small intestine C) loss of the appendix's function will cause an immune deficiency in the digestive system D) it is likely to cause massive infection of the abdominopelvic cavity
Which of the following is NOT a correct matching of a fetal structure with what it becomes at birth?
A) foramen ovale?fossa ovalis B) ductus venosus?ligamentum venosum C) ductus arteriosus?ligamentum teres D) umbilical arteries?medial umbilical ligaments
Which of the nitrogenous bases is part of RNA but not DNA?
A) Guanine B) Uracil C) Thymine D) Cytosine
Which group of antiulcer medications blocks receptors on parietal cells in the stomach, thereby reducing gastric acid secretion?
a. mucosal protectives b. H2-receptor antagonists c. systemic antacids d. nonsystemic antacids