Which property of water makes it effective for temperature regulation in the body?
High viscosity
High density
Low solubility
High specific heat
The Correct Answer is D
A. High viscosity: Viscosity describes a fluid’s resistance to flow and is not the main reason water stabilizes temperature.
B. High density: Density affects mass per volume but does not explain water’s ability to absorb and release heat with little temperature change.
C. Low solubility: Water is actually a good solvent; solubility is unrelated to temperature buffering.
D. High specific heat: Water can absorb or release large amounts of heat with only small changes in temperature, making it effective for temperature regulation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Nucleus: Contains the cell’s genetic material and regulates gene expression and cell activities, but does not act as the selective barrier for material exchange with the external environment.
B. Lysosome: Membrane-bound organelle with hydrolytic enzymes that digests macromolecules and damaged organelles; not responsible for controlling entry/exit of substances.
C. Plasma membrane: A phospholipid bilayer with embedded proteins that provides selective permeability, transport channels, pumps, and mechanisms (endocytosis/exocytosis) controlling passage of materials into and out of the cell.
D. Cytoplasm: The intracellular fluid and organelle-containing matrix where metabolic reactions occur; it does not determine what crosses the cell boundary.
Correct Answer is C
Explanation
A. Stores fat: Fat storage is a role of adipose (connective) tissue, not nervous tissue.
B. Transports blood: Blood transport is the function of the circulatory system; nervous tissue does not move blood.
C. Conducts electrical impulses: Nervous tissue (neurons) is specialized to generate and transmit electrical signals for communication and control.
D. Covers bones: Covering surfaces is a function of epithelial tissues (and periosteum for bone), not nervous tissue.
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