Active Transport

Question 1

what is active transport?

Answer 1

substances absorbed against the concentration gradient form a regioon of low concentration to a region of high concentration.. requires ENERGY from RESPIRATION

Question 2

In active transport.. 2 things

Answer 2

particles move against the concentration gradient

requires energy from respiration

Question 3

How are root hair cells specialised for absorbing minerals and water 3

Answer 3

1 cells on surface of plant grow into LONG HAIRS
2 gives BIG SURFACE AREA
3 water and minerals absorbed better from soil

Question 4

Root hair cells take in minerals from water by active transport.. how?

Answer 4

active transport allows plant absorb minerals from DILUTE solution AGAINST CONCENTRATION GRADIENT

Question 5

Active transport in humans .. GUT

Answer 5

when a low concentration of nutrients

allows nutrients to be taken into the blood

Question 6

what is being researched to limit the environmental impact of traditional mining?

Answer 6

New ways of extracting copper from low-grade ores

Question 7

copper can be obtained from copper solutions of copper salts by electrolysis and what happens?

Answer 7

positive ions move towards the negative electrode and are deposited as copper metal

Question 8

Copper can be extracted from solutions of copper salts using what and how?

Answer 8

scrap iron

iron more reactive than copper so it can displace copper from copper salts

Question 9

current methods of extraction are expensive because

Answer 9

many stages in processes
requires a lot of energy
has to be worth extraction