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Describe the movement of ions, and changes in potential, across the nerve cell membrane during depolarisation and repolarisation.

During depolarisation, sodium ions move into the cell, resulting in the membrane potential rising from -70 millivolts (mV) to +40mV.During repolarisation, potassium ions move out of the cell, and the membran...
WP
Answered by William P. • Biology tutor
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Solve x^2 - 5x - 14 = 0

This is an example of a quadratic equation which we can solve on of two ways as it takes the form ax^2 + bx - c = 0a = 1, b = -5, c = -14 (1) Factorisation which we can do ourselves OR (2) Use the quadratic ...
JB
Answered by Jessica B. • Maths tutor
9587 Views

Describe why organisms may become extinct due to a change in the climate

Organisms may be less well adapted to the changing climate. The organisms will be outcompete by other organisms and it will be harder to them to find food and shelter which are crucial to the organisms survi...
JL
Answered by Jessica L. • Biology tutor
3418 Views

Name 4 organelles within an animal cell

NucleusMitochondriaGolgi ApparatusSmooth endoplasmic reticulum
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Answered by Zoe C. • Biology tutor
3022 Views

What are the key musical and historical features that distinguish 'the blues' from other musical genre?

The blues was forged under the conditions of slavery originally manifested in the form of work songs and spirituals by African Americans who were forced to transport such musics to the North American colonie...
LH
Answered by Luke H. • Music tutor
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