What additional affects will a vagotomy (severing the vagus nerve) have on a patient, besides lowering stomach acid secretion?
a) A vagotomy will inhibit the secretion of somatostatin, which will decrease the acid in the stomach too much.
b) Stomach acids are needed to activate pepsinogen so lower acid secretion will affect protein digestion in the stomach.
c) If there is a decrease in acid, then there will be an increase in the production of chyme to enter the small intestine.
d) Stomach acids are necessary to keep the mucous membrane proliferating. If there is a decrease in stomach acids, the epithelial lining will no longer go through mitosis.
Answer: b) Stomach acids are needed to activate pepsinogen so lower acid secretion will affect protein digestion in the stomach.
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1. The nucleolus is the “brain” of the cell; it directs all cell activity. 2. The flagella are the “tail” of the sperm cell and act to propel it. 3. Ribosomes are the “protein factories” of the cells. 4. The things that make rough endoplasmic reticulum rough are ribosomes. 5. The nucleolus plays an important role in the formation of ribosomes.
Which of the following is NOT a difference between DNA and RNA?
A. They have different sugars. B. RNA is a single strand, while DNA is a double strand. C. They both can leave the nucleus to perform their functions. D. DNA has thymine, while RNA has uracil.
Each ________ includes a Z disc and extends from each side of the Z disc to the ends of the myosin myofilaments.
A. sarcomere B. isotropic band or I band C. muscle fiber D. anisotropic band or A band
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a. the pancreatic islets. b. the thymus. c. the parathyroid glands. d. the adrenal cortex. e. the neurohypophysis.