Ion channel opening following acetylcholine binding to the postsynaptic side of

Question

Ion channel opening following acetylcholine binding to the postsynaptic side of a neutromuscular junction is an example of a ____ channel. (voltage-gated, leakage, stress-activated, ligand-gated). Na^+/K^+ ATPase is an example of a _____ while the Ca^2+ ATPase pump of the sarcoplasmic reticulum represents a___ HIV is a viral disease where the virus enters cells upon activating a cell surface protein. The manner in which the virus enters the cell may be described as___. a) Exocytosis: b) pinocytosis: c) phagocytosis: (d) receptor-mediated endocytosis: c) facilitated diffusion If a blood cell is placed in a 4% NaCI solution water will move ____ into: out of) the cell resulting in___(crenation: lysis. maintenance of cell shape) Caffeine is a nonpolar molecule. What is the most likely method by which it is absorbed into cells? a) Facilitated diffusion: b) osmosis: c) active transport: d) diffusion: e) exocytosis Cystic fibrosis is a disease caused by defective chloride ion transport into the lungs that results in thick, dehydrated mucus build-up that promotes bacterial infection and other pathologies. What is the most likely cause of the defect that causes this disease? a) Defective phagocytosis: b) defective exocytosis: c) defective osmosis: d) defective transmembrane protein Bacteriorhodopsin is an example of a____(indicate all that apply). a) Light-driven pump: b) proton pump: c) passive transporter:

Explanation / Answer

Ans.4 -If a blood cell is placed in a 4% NaCl solution water will move out of the cell by osmosis resulting in crenation in shape and the cell becomes smaller; because such a solution is hypertonic to the cells.

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