Top answers

Describe what happens at a synapse.

An action potential (electrical impulse) arrives at a synapse (a gap between two neurones) which causes calcium voltage-dependent gates to open in the presynaptic neurone. An influx of calcium ions triggers ...
DA
Answered by dana A. • Biology tutor
3846 Views

How does the reflex arc work without going to the brain?

The reflex arc is designed for quick, reactive movements that are instinctive. E.g. when we touch a hot pan, we need to react quickly otherwise our hand will get really badly burned. If the signal went from ...
AG
Answered by Armaan G. • Biology tutor
2841 Views

Name 3 organelles found in animal cells.

Rough endoplasmic reticulum, Mitochondria, Golgi apparatus
DF
Answered by Darragh F. • Biology tutor
3072 Views

Explain the different functions of the components of a plant cell.

Functions of plant cell organelles Cell membrane: Controls the movements of substances in and out of the cell Cytoplasm: thick substance where chemical reactions occur. Nucleus: contains the genetic informat...
IL
Answered by Imogen L. • Biology tutor
3603 Views

What is the difference between DNA and RNA?

-DNA (Deoxyribose nucleic acid) is a structure made up of a sugar-phosphate backbones linked to one of four chemical bases (adenine, thymine, guanine or cytosine) DNA has a double helix structure that coils ...
BM
Answered by Benjamin M. • Biology tutor
3037 Views