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2 days ago · In GCSE biology, active transport is defined as the movement of particles across a membrane from an area of low concentration to an area of high concentration. This movement occurs against a concentration gradient, so energy is required. During active transport, particles must travel via a protein carrier molecule rather than directly across ...
Feb 28, 2021 · Some examples of pumps for active transport are Na +– K + ATPase, which carries sodium and potassium ions, and H +– K + ATPase, which carries hydrogen and potassium ions. Both of these are antiporter carrier proteins.
For an organism to function, substances must move into and out of cells. Three processes contribute to this movement – diffusion, osmosis and active transport. Cellular respiration and transport...
Jan 28, 2022 · Net Primary Production. During photosynthesis, primary producers (such as plants and algae) convert light energy into chemical energy in biological molecules. Gross primary production (GPP) can be defined as the amount of chemical energy stored in the carbohydrates within plants (during photosynthesis) In other words, the quantity of energy ...
Edexcel. Transport in cells - Edexcel Diffusion. Diffusion is the movement of particles from a high to lower concentration. Osmosis is the diffusion of water across a membrane. Active transport...
The field of biology (and all the sub-fields of biology, such as zoology, botany, entomology and ornithology) is full of terms that may unfamiliar to those not from a scientific background. In this glossary, we hope to explain the meaning of over 60 different words and phrases you may come across.
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Sep 3, 2021 · Active transport refers to movement of materials from an area of lower concentration to an area of higher concentration, against the concentration gradient. To do this, energy is required, usually from ATP. Cell membrane pumps, endocytosis and exocytosis (the focus of the previous lesson) all aid in active transport.
