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When an action potential arrives at the pre-synaptic knob voltage-gated calcium ion channels open, allowing calcium ions to diffuse into the synaptic knob. The influx of calcium ions causes neurotransmitt...

Cancer cells are continually dividing in an uncontrolled manner and have adapted mechanisms of avoiding cell death. They are also more mobile and are capable of spreading to different parts of the body to...

mitochondria, nucleus, nucleolus, golgi body, SER, RER, plasma membrane, centriole, ribosome, cytoplasm,

Meiosis consists of 2 separate divisions and produces 4 genetically different daughter cells, whereas in mitosis there is only one division and it produces 2 genetically identical daughter cells. Meiosis ...

Diffusion is passive (doesn't need use energy as ATP) where as active transport is active (by hydrolysis of ATP )
Diffusion is down a concen...