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What is the role of the kidney in water homeostasis?

The kidney has several functions, but in this short paragraph I am going to explain about it's principal function- controlling water levels in the body. Imagine you are in a desert and you have not had a dri...
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Answered by Grace R. • Biology tutor
3794 Views

What are the electrical changes in an axon that occur during an Action Potential?

The resting potential of the axon membrane is around -70mV, where it is more negative on the outside of the axon than the inside. A stimulation causes Na+ (sodium ions) channels in the axon membrane to open ...
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Answered by Belia F. • Biology tutor
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How are nerve cells adapted to their function?

To answer this question we first need to understand what the function of a nerve cell, or neurone, is. Neurons need to be able to rapidly transmit electrical impulses along their length. They also need to ex...
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Answered by Christian H. • Biology tutor
134132 Views

What is co-transport and why do I sometimes hear it being called active transport?

Example: absorption of sodium ions (Na+) and glucose by cells lining the ileum (a part of the small intestine) 1. Na+ actively transported into the blood from epithelial cells, by the sodium-potassium pump ....
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Answered by Olivia L. • Biology tutor
9463 Views

What is the role of the rough endoplasmic reticulum and the Golgi apparatus in protein transport within cells?

Firstly, during protein synthesis, the DNA is transcribed into mRNA in the nucleus, which then can move out of the nucleus into the cytoplasm. This is where translation occurs, where the mRNA is read and tra...
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Answered by Mary-Jane G. • Biology tutor
6058 Views