Active transport Flashcards
what is active transport?
•the process in which substances are absorbed against a concentration gradient (they are moved from a lower to high concentration instead of high to low)
•this requires energy from respiration
what are the differences between diffusion and active transport?
•diffusion doesn’t require energy from respiration while active transport does
•diffusion involves particles being moved down the concentration gradient while active transport involves particles being moved against the concentration gradient
How do root hair cells take in minerals?
•the concentration of minerals is usually higher in the root cells than in the soil around them therefore root hair cells can absorb minerals through diffusion
•active transport allows the plant to absorb minerals from a dilute solution against a concentration gradient essential for growth
•this needs energy from respiration to work
When is active transport used in the human body?
when there is a lower concentration of nutrients in the gut but higher of nutrients in the blood so glucose can’t diffuse naturally into the blood
How is active transport used in the gut?
•when there is higher concentration of glucose in the gut they diffuse naturally into the blood but sometimes the concentration of the glucose is lower than the blood so active transport is needed
•active transport allows nutrients to be absorbed into the blood against a concentration gradient so glucose can be transported for cells where it is used for respiration
