B3 - Active transport

Description

GCSE Biology (B3) Mind Map on B3 - Active transport, created by Lily O'Brien on 28/03/2017.
Lily O'Brien
Mind Map by Lily O'Brien, updated more than 1 year ago
Lily O'Brien
Created by Lily O'Brien about 7 years ago
9
0

Resource summary

B3 - Active transport
  1. Root hairs are specialised for absorbing water and minerals
    1. The cells on the surface of plant roots grow into long hairs which stick out into the soil. This gives the plant a big surface area for absorbing water and mineral ions from the soil. Most of the water and mineral ions get into a plant are absorbed by the root hair cells.
    2. Root hairs take in minerals using active transport
      1. The concentration of minerals is usually higher in the root hair cell than in the soil around it so normal diffusion doesn't explain how minerals are taken up.
        1. Active transport allows the plant to absorb minerals from a very dilute solution, against a concentration gradient. This essential for growth. It needs energy for respiration to make it work.
          1. This also happens in humans - taking glucose from the gut and from kidney tubules
      2. Active transport is used in the gut when there is a low concentration of nutrients in the gut but a high concentration of nutrients in the blood
        1. When there's a higher concentration of glucose and amino acids in the gut they diffuse naturally into the blood
          1. But sometimes there's a lower concentration of nutrients in the gut than there is in the blood
            1. This means the concentration gradient is the wrong way.
        Show full summary Hide full summary

        Similar

        AQA Biology 8.1 structure of DNA
        Charlotte Hewson
        B3 Quiz
        Tess Brockway
        GCSE AQA Biology - Unit 2
        James Jolliffe
        GCSE Biology AQA
        isabellabeaumont
        Biology AQA 3.1.3 Cells
        evie.daines
        Biology AQA 3.2.5 Mitosis
        evie.daines
        GCSE AQA Biology 1 Quiz
        Lilac Potato
        Light microscopes
        Jessica Phillips
        FLASHCARDS ABOUT DIGESTIVE SYSTEM
        Ahmed Almohammed
        Ecology
        R P
        Enzymes and Respiration
        I Turner