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The smallest living unit is the CELL and is organised in different ways according to its function. Although they are a bit different, there are some common features. For the animal cell, these are: a nucl...

This is because of the strong attractive electrostatic forces holding the oppositely charged ions together and a large number of ionic bonds in the crystal lattice. These require a lot of thermal energy t...

Input via dendrites, nucleus, axiom (action potential : sodium, potassium), axiom terminals, synaptic cleft (repeat)

So, six mark questions are notorious for being anxiety inducing but they aren't as scary as they seem. What we as a pair have to do is simply sit down together and go through all the possible six mark que...

Reflex action/reflex arc/reflex (allow "involuntary") The stimulus (heat) is detected by temperature receptors in the skin. This causes impulses to travel along a sensory neurone to the spinal c...