The most common blood-borne factors that influence hypothalamic neurosecretion are the positive feedback effects of peptide hormones
a. True
b. False
Indicate whether the statement is true or false
False
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Which of the following statements regarding neural regulation of gastrointestinal function is TRUE?
A. Networks of neurons in the wall of the GI tract innervate the wall's smooth muscle. B. Smooth muscle of the GI tract is innervated by both sympathetic and somatic motor nerves. C. If the autonomic nerves to the GI tract were cut, digestion and absorption of food could no longer take place. D. The nerve plexus of the GI tract exists in a single layer, just outside of the serosa. E. There are no afferent neuronal pathways from the GI tract to the central nervous system.
The stomach lining contains numerous depressions called
A) gastric glands. B) gastric mucosa. C) intestinal glands. D) gastric pits. E) All of the answers are
You are designing a drug. You'd like to deliver the drug by creating a skin patch that is impregnated with the drug and allowing the drug to diffuse through the layers of the skin to reach the underlying tissues and bloodstream. Which of these chemical changes might you make to increase the number of drug molecules that diffuse through the layers of skin cells?
A. Increasing the number of oxygen atoms in the drug B. Decreasing the number of nonpolar groups in the drug C. Increasing the number of nitrogen atoms in the drug D. Increasing the number of ionized groups in the drug E. Decreasing the number of polar groups in the drug
Matching
A) B B) D C) C D) A 6) Tidal volume. 7) Inspiratory reserve volume. 8) Residual volume. 9) Expiratory reserve volume. 10) Air that does not participate in the exchange of gases.