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1. Pacinian corpuscle is stimulated by pressure on the skin. 2) This opens stretch mediated sodium ion channels. 3) Sodium ions leak into the sensory nerve axon via facilitated diffusion thereby causin...

A chemical called a neurotransmitter passes from one neurone to the next causing an electrical impulse.

- 2 strands:  Intertwine to form a double-helix structure                                                    Phosphodiester bonds between between phosphate group and pentose sugar of nucl...

Resting membrane potential of a neuron is maintained by active transport of sodium (Na+) out of the cell and potassium (K+) into the cell through the Na+/K+ pump. Due to the negative charge of Cl- and som...

The rate of photosynthesis is affected by:

1. Light intensity - without enough light, cells cannot photosynthesize even if there is an excess of carbon dioxide and water

2. Ca...