Top answers

Biology
A Level

How does Acetylcholine act on a neuronal synapse, and how is it re-uptaken?

 - Ca2+ voltage gated channels are activated due to an action potential reaching the synapse

 - Acetylcholine rests in the pre-synaptic cleft

 - They are stored in vesicles

 - The cal...

KR
Answered by Krishan R. Biology tutor
2550 Views

Outline the process of mitosis

Meiosis is the process of cell division that produces two identical diploid cells, and consists of four stages.

The first stage is called prophase, where the chromosomes condense and cross over to ...

AR
Answered by Anastasia R. Biology tutor
5428 Views

How does the hormone ADH control urine output?

ADH is a hormone that decreases the urine output in humans. It is produced by the hypothalamus and secreted by the posterior pituitary gland. The production is controlled by osmoreceptors and baroreceptor...

BF
Answered by Ben F. Biology tutor
3101 Views

Describe and explain the function of the cell membrane?

The cell membrane consists of a mosaic of proteins and a phospholipid bilayer, with the hydrophobic fatty acid tails orientated inwards and the hydrophilic phosphate heads outwards. The main function is t...

TD
2968 Views

The pancreas contains areas called the islets of Langerhans. What are the two types of cells in this area and what hormone does each produce?

The islets of Langerhans contain alpha and beta cells. Alpha cells produce and secrete glucagon. Beta cells produce and secrete insulin.

HS
Answered by Harrison S. Biology tutor
2890 Views

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