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The membrane of all nerve cells maintains a potential difference of -70mV by pumping positive Na+ ions out of the cell. This is called the resting potential. A nerve impulse is a change in this potential ...

1.) First starts in the sino-atrial node. 2.) Sino-atrial node sends out regular waves of electricity to the atrial walls in order to initiate heart beat.3.) This leads to contraction of right and left at...

At the first proton pump and associated electron carrier of the inner mitochondrial membrane reduced NAD releases two H⁺ ions and two electrons. An electron travels down a series of electron ca...

Unicellular organisms have a large surface area to volume that is one cell thick, therefore they have a short diffusion distance and are metabolically inactive. Therefore, they can obtain sufficient oxyge...

The organelles present in a Eukaryotic cell and there functions are the following: The Nucleus - the nucleus controls all the cells activities, it houses the DNA. Rough Endoplasmic Reticulum - The Rough E...