Describe the three types of stimuli that activate the endocrine organs
What will be an ideal response?
The stimuli that activate endocrine glands fall into three major categories: hormonal, humoral, and neural. The most common stimulus is hormonal, in which endocrine organs are prodded into action by other hormones, known as tropic hormones. Changing blood levels of certain ions and nutrients stimulate hormone release; these stimuli are referred to as humoral stimuli. The third type of stimulus is neural, in which nerve fibers stimulate hormone release.
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Special hair-like projections on the luminal surface of the small intestine epithelial cells, the microvilli, form the __________
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The source of calcium in smooth muscle is the ____________________
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Which of the following best explains diffusion?
A) movement of molecules from an area of high concentration to an area of low concentration B) movement of molecules from where there are fewer of them to where there are more C) movement of molecules farther away from equilibrium D) exchange of nonpolar molecules for polar molecules
When inserting a stylet into an ET tube, you must ensure that:
A) the stylet rests at least ½ in back from the end of the tube. B) you use a petroleum-based gel to facilitate easy removal. C) the stylet is rigid and does not allow the ET tube to bend. D) the tube is bent in the form of a U to facilitate placement.