Transport Across Cell Membrane is part of the General Physiology section of Physiology. Practise 49 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Potassium leak channels and the resting potential, calcium-dependent exocytosis and the asymmetric lipid bilayer with its 50:50 protein-to-lipid mass drive these Transport Across Cell Membrane MCQs — core high-yield NEET PG physiology.
At rest, cell is permeable to potassium ions (positively charged) through leaky potassium ion channels. This passive diffusion of potassium ions from inside to outside of the cell generates RMP Reference: Ganong, 25 th edition page no.9
Exocytosis - cell vomiting Large molecules are released to the exterior of cell following fusion of vesicle with cell membrane Fusion of vesicles with cell membrane requires Ca Eg- Hormone, neurotransmitter release Reference: Guyton & Hall, 14th edition pg no. 46
Three type of lipids are seen in the cell membrane: Lipids with phosphate group attached-Phospholipids Lipids with carbohydrate group attached-Glycolipids Sterols-cholesterol Triglycerides are not seen in cell membrane Reference: Ganong, 25 th edition page no. 35
Most lipids are distributed unequally (asymmetric distribution) Some lipids are present on the outer surface of membrane. For example, Glycolipids are usually seen on the outer side Some lipids are present on the inner surface of membrane. For example, phosphatidylinositol, and phosphatidylserine are usually seen on the inner side Reference: Ganong, 25th edition page no.36
Membranes are asymmetric structures Reference: Ganong, 25th edition page no.35
In terms of numbers, protein dominates lipids in cell membrane But, it terms of mass, there is equal distribution of protein and lipids (50:50) Reference: Ganong, 25th edition page no.35
Lipid soluble substances and gases like oxygen and carbon dioxide diffuse membrane easily Reference: Ganong, 25 th edition page no.35
At rest, cell membrane is freely permeable for potassium ion This is the reason behind development of RMP which is due to potassium ion Reference: Ganong, 25 th edition page no.35
Potassium leak channels and the resting potential, calcium-dependent exocytosis and the asymmetric lipid bilayer with its 50:50 protein-to-lipid mass drive these Transport Across Cell Membrane MCQs — core high-yield NEET PG physiology.
MedLadder includes 49 curated MCQs for Transport Across Cell Membrane under Physiology (General Physiology), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
