BIOD101 / BIOD 101 Module 1:
(Latest Update 2025 / 2026) Essential Biology I with Lab | Questions & Answers | Grade A 100% Correct - Portage Learning
Question:
fluid-mosaic model of membrane structure
Answer:
proposes that membrane is a phospholipid double in which proteins are either partially or entirely embedded
Question:
solutes
Answer:
molecules which are dissolved in solvent
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Question:
structure of cell membrane
Answer:
made up of phospholipids and proteins, as well as cholesterol, carbohydrates, ions, water
lipids' heads are arranged in orderly fashion, tails are in constant fluid motion to allow protein movement
cholesterol give strength and flexibility to membrane
Question:
passive transport
Answer:
no input of energy needed
simple diffusion, osmosis, filtration, facilitated diffusion
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Question:
selective permeability
Answer:
cell membrane allows passage or transport of only certain, usually smaller, solutes
Question:
simple diffusion
Answer:
tendency for solutes to move from an area of high to low concentration oxygen, carbon dioxide, chloride, and urea all rely on concentration gradients to flow into and out of cell until equilibrium is achieved
Question:
protein channels
Answer:
sodium channels are specifically shaped to accommodate a pore that fits sodium ions allows movement from areas from high to low concentrations of sodium
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