1.9) Active Transport (biology)

what is active transport?

the movement of particles from a region of low concentration to a region of high concentration (through membrane) against the concentration gradien, using energy from respiration.

Active transport in organisms:

the intake of minerals from the soil, active transport moves minerals into the root against the concentration gradient.(plant/root hair cells)

active transports in organisms:

absorbing amino acids from the small intestine to the blood, active transport make sures all amino acid/glucose is absorbed(animal cells)

protein carriers:

• found in cell membranes

• stick to specific molecules, change shape to carry molecules across the membrane

• can be active or passive process (usually in active transport)

how are root hair cells adapted to become specialised cells?

• large surface area to absorb water

• thin cell wall fro easy water movement

• lots of mitochondria to provide energy for active transport (of the uptake of minerals from the soil)

why is water so important in biology?

• transports nutrients/oxygen to cells

• can dissolve in many substances

• act as solvent

• allows out cells to use valuable nutrients in biological processes