*NURSING > EXAM > NURSE 395-Pathophysiology Quizzes Unit 1 and 4 (All)

NURSE 395-Pathophysiology Quizzes Unit 1 and 4

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1. The student is examining a tissue sample with a microscope. The student decides that it is squamous keratinized tissue. Which type of epithelial tissue is the student viewing? You selected: Stra... tified epithelium Correct Explanation: Stratified, squamous keratinized epithelium makes up the epidermis of the skin. Simple epithelium is found in the lining of blood vessels, lymph nodes, and alveoli of the lungs. Gl ... (more) Question 2: Which hormone messenger moves directly across the lipid bilayer of the cell membrane and is transported to the cell nucleus? You selected: Thyroid hormones Correct Explanation: Some messengers, such as thyroid hormone and steroid hormones, do not bind to membrane receptors but move directly across the lipid bilayer of the cell membrane and are transported to the cell nucleus, where they influence DNA activity. (less) Question 3: Which form of signal transduction resulting from ligand-receptor binding has the potential to produce effects in the entire body system? You selected: Endocrine Correct Explanation: Cells communicate in several ways. In autocrine signaling a cell releases a chemical to the extracellular fluid which changes its own activity. In paracrine signaling a cell releases a chemical to the extracellular fluid, but enzymes rapidly metabolize the chemicals so they only act on nearby cells. In endocrine signaling the cells release chemical mediators (hormones) that enter the bloodstream, then bind to cell receptors throughout the body. A ligand is a substance with a high affinity for the receptor. (less) CONTINUED........ [Show More]

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