Explain active transport
The movement of substances against a concentration gradient, requires energyUse diagram
KP
Related Biology GCSE answers
All answers ▸menstrual cycle and contraceptive pills
Explain how an adult develops immunity to the toxin.
Define 'biomass'
Neurons do not make direct contact but are separated by synapses. Impulses cross a synapse by means of a neurotransmitter. Describe the process of neurotransmitter release at a synapse. You may use a labelled diagram.