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Human Biology
A Level

What is a Neurones resting membrane potential and how is it maintained?

On average neurones in the body have a resting membrane potential (RMP) of -70mv. What this means is when inactive/ not excited, the inside of neurone is more negative than the outside of the neurone this...

Answered by Idrees A. Human Biology tutor
5010 Views

What is X-linked recessive inheritance?

Genetic diseases with an X-linked recessive inheritance pattern usually affect only the males in a family. These diseases are inherited via mutations on the X chromosome. Females have two X chromosomes an...

Answered by Tutor33979 D. Human Biology tutor
5285 Views

When blood enters an arteriole, fluid leaks out into the tissues. Explain how most of the fluid is returned to the arteriole.

Blood in an arteriole is under high pressure at the start of the vessel, called hydrostatic pressure, and fluid can leak through its permeable membrane into the surrounding tissues. This leaves blood cell...

Answered by Hugh S. Human Biology tutor
5880 Views

What is a synapse and what role do neurotransmitters play?

Firstly, you need to understand where a synapse is and the structure of a neuron (a basic diagram of a neuron could be useful).The brain is made up of a type of cell called a neuron and t...

Answered by Emma R. Human Biology tutor
11774 Views

What is the role of a vitamin in the body?

A vitamin is a nutrient or dietary component made up by an organic molecule and required by the body in very small amounts. It acts as a co-enzyme to prevent a deficiency disease.

Answered by Natasha P. Human Biology tutor
3125 Views

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