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Gonorrhoea is caused by a bacteria whereas HIV is a virus. Antibiotics are only effective on bacterial diseases, but do not treat viruses as they are found inside the host cell. 

Oxygen moves down the trachea, into the bronchi and into the smaller bronchioles, down a pressure gradient. Once the oxygen reaches the alveoli it moves down a diffusion gradient across the alveolar epith...

An unconsious action in response to a stimulus. These are very quick movements and have evolved to allow basic protection. For example, when you touch something hot, you automatically remove your hand bef...

A synapse is the area between two nerve cells, allowing electrical impulses to be passed between them. In order to cross the gap from one neuron to another, the impulse gets converted to neurotransmitter ...

Answer = 50% chance of developing cystic fibrosis