Which is TRUE concerning muscle tissue?
always under voluntary control
is a single-celled tissue
cuboidal shape enhances function
highly cellular and well vascularized
The Correct Answer is D
A. always under voluntary control: Not all muscle tissue is under voluntary control. Skeletal muscle is voluntary, but cardiac and smooth muscles are involuntary, functioning independently of conscious control.
B. is a single-celled tissue: Muscle tissue is not composed of a single cell type. Skeletal muscle fibers are multinucleated, cardiac muscle cells are branched with intercalated discs, and smooth muscle cells are spindle-shaped, showing structural diversity.
C. cuboidal shape enhances function: Muscle cells are elongated, not cuboidal. Their elongated shape allows efficient contraction and force generation, which would not be possible with cuboidal-shaped cells.
D. highly cellular and well vascularized: Muscle tissue consists mostly of cells with minimal extracellular matrix and requires a rich blood supply to deliver oxygen and nutrients for sustained contraction, making this the accurate statement.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. gluconeogenesis, citric acid cycle, lipolysis:Gluconeogenesis is the synthesis of glucose from non-carbohydrate sources, and lipolysis is the breakdown of fats. Neither represents the complete oxidation of glucose for energy production.
B. glycogenesis, lipogenesis, oxidative phosphorylation of the electron transport chain:Glycogenesis and lipogenesis involve the storage of glucose and fat, respectively, rather than its breakdown for ATP production.
C. glycolysis, citric acid cycle, oxidative phosphorylation of the electron transport chain:Glycolysis breaks glucose into pyruvate in the cytoplasm. The citric acid cycle oxidizes acetyl CoA derived from pyruvate, producing NADH and FADH₂. These coenzymes then donate electrons in the electron transport chain for oxidative phosphorylation, generating ATP, completing glucose oxidation.
D. lipolysis, glycogenolysis, beta oxidation:These processes involve the breakdown of fats and glycogen, not the full oxidation of glucose, so they do not represent the standard cellular respiration pathway.
Correct Answer is A
Explanation
A. mesothelium:Mesothelium is a specialized simple squamous epithelium that lines the serous membranes of body cavities, including the peritoneum, pleura, and pericardium. It provides a smooth, friction-reducing surface and facilitates the movement of organs within these cavities.
B. hyaline epithelium:Hyaline epithelium is not a recognized tissue type. Hyaline typically refers to cartilage, not epithelial tissue, and does not line serous membranes.
C. areolar CT:Areolar connective tissue is a loose connective tissue that supports and cushions organs, but it is not an epithelial layer and does not form the lining of serous membranes.
D. endothelium:Endothelium is a simple squamous epithelium that lines blood vessels and the heart, not serous cavities. It functions primarily in exchange of materials and maintaining vascular homeostasis.
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