Thursday, April 1, 2010

Synapse & transmission of information



















What is synapse?
- it is the site where 2 neurones, or a neurone & an effector cell communicate.

Nerve impulses must cross the synapse in order to carry NI/information along to another neurone. Chemicals are used by a neurone to trasmit an impulse across a synapse.
How transmission of chemical signals across the synapse? (refer notes pg7, #6, memorise this!)
Transmission of NI across synapse is an active process/transport which requires energy/ATP. therefore, the synaptic knob contains abundant of mitochondria for generation of energy.

*pls note that action potential, calcium, sodium ion channels, endocytosis are not covered under spm syllabus.