Active Transport (1.3.3) PDF
Document Details
Uploaded by Deleted User
Tags
Summary
This document explains active transport, a process where particles move against their concentration gradient, using examples in root hairs and the gut. The process requires energy from respiration.
Full Transcript
Active Transport (1.3.3) Active transport is the movement of particles from an area where they are in lower concentration to an area where they are in higher concentration- against their concentration gradient. This is not passive as diffusion is, but requires energ...
Active Transport (1.3.3) Active transport is the movement of particles from an area where they are in lower concentration to an area where they are in higher concentration- against their concentration gradient. This is not passive as diffusion is, but requires energy from respiration, which is why it is called active. In root hairs: They take up water and mineral ions (for healthy growth) from the soil Mineral ions are usually in higher concentrations in the cells, meaning diffusion cannot take place This requires energy from respiration to work In the gut: Substances such as glucose and amino acids from your food have to move from your gut into your bloodstream Sometimes there can be a lower concentration of sugar molecules in the gut than the blood, meaning diffusion cannot take place Active transport is required to move the sugar to the blood against its concentration gradient Untitled 1
