Top answers

Can you explain the importance of the refractory period within the axon?

The refractory period means that another action potential cannot be generated.This is important as it allows the action potential to not propagate back but reset via the sodium-potassium pump, to restore res...
EL
Answered by Eve L. • Biology tutor
3937 Views

Give examples of some factors that increase the rate of diffusion.

Temperature: An increase in temperature increases diffusion rate. Concentration gradient (difference in concentration): A greater concentration gradient increases diffusion rate. Surface area of a membrane: ...
MA
Answered by Miya A. • Biology tutor
24707 Views

What is chemiosmosis?

If osmosis is the movement of water across a partially permeable membrane, then chemiosmosis is the same, but for chemicals. Let's consider the mitochondria, which has a double membrane envelope, and let's t...
JB
Answered by Jeremy B. • Biology tutor
5755 Views

How is protein digested in the human gut?

Protein digestion begins in the stomach by the secretion of gastric juice, a combination of Hydrochloric acid and the enzyme Pepsin. Food then passes into the duodenum, or small intestine, where pepsin works...
Answered by • Biology tutor
15111 Views

How does natural selection work ?

A common misunderstanding is to think that evolution results from a species changing to be better adapted to its environment. Evolution is actually the result of environmental pressures selecting different c...
RB
Answered by Rafaelle B. • Biology tutor
3255 Views