A&P II Exam 3: Chapters 22-24
Questions with 100% Verified Correct Answers Describe the role of the digestive system - Correct Answer Extract nutrients from food to provide them to cells What are the accessory organs of digestive system - Correct Answer Liver, salivary glands, pancreas, gull-bladder Innermost layer of digestive tract - Correct Answer Mucosa layer (mucosa, lamina propria, mscularis mucosa) Second innermost layer - Correct Answer Submucosa (glands, blood vessels, dense irregular connective tissue) Third innermost layer - Correct Answer Muscularis Externa (inner circular and outer longitudinal layers) Fourth innermost layer - Correct Answer Serosa (visceral peritoneum) Which muscle is found in digestive organs - Correct Answer Smooth muscle When muscles contract, they twist like a... - Correct Answer Corkscrew (non-linear arrangement of dense bodies within the cell) Multi-unit smooth muscle cells - Correct Answer Innervated in motor units, may be connected to more than one motor neuron Visceral smooth muscle cells - Correct Answer Lack direct contact with a motor neuron, connected by gap junction and dense bodies - can be triggered by pacesetter cells Multi-unit cell locations - Correct Answer Iris, male reproductive tract, walls of large arteries, erector pili 1 / 2
Visceral cell locations - Correct Answer Walls of GI tract, gull bladder, urinary bladder - many others Due to ____, smooth muscle can adapt to various lengths and still contract - Correct Answer Plasticity Muscle contraction that propels food through the digestive tract - Correct Answer Peristalsis Digestion is regulated by what factors - Correct Answer Local factor, hormonal, and neural control Local factor example - Correct Answer Change in lumen pH, physical distortion, or present chemicals Which cells in the epithelium produce peptides in the digestive tract - Correct Answer Enteroendocrine cells T or F? The root of the tongue is part of the posterior boundary of the oral cavity - Correct Answer True Ridges of oral mucosa (gums) - Correct Answer Gingivae Space between oral cavity and oropharynx - Correct Answer Fauces Lingual frenulum - Correct Answer Attaches tongue to base of oral cavity Labial frenulum - Correct Answer Attaches gums to upper lip Occlusal surface and enamel are parts of the - Correct Answer crown - projects into oral cavity Enamel - Correct Answer Hardest biologically manufactured substances - calcium phosphate Incisors - Correct Answer Blade shaped - clipping or cutting - single root
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