Check out my previous post on what photoreceptors are...
o effectively detect light, your eye has two types of photoreceptors, rod and cone cells. Rod cells are the most sensitive to light. They fire action potentials in dim light.
In your eye, many rod cells join one neurone. Essentially, this means that lots of weak signals can combine to reach the threshold and fire an action potential - in scientific terms: many weak generator potentials can combine to reach the threshold so an action potential is fired sooner.
No comments:
Post a Comment