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Describe the changes at the cell membrane of a neuron during an action potential.

At rest the membrane potential is -70mV.

This is due to the Na⁺/K⁺ pump, which actively transports 3 Na⁺ ions out of th...

Answered by Alex N. • Biology tutor

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Outline the lock and key mechanism of enzyme-controlled reactions

Enzymes are proteins that catalyse specific biological reactions in the body. These proteins have a specific 3D structure known as a teritary structure, with a specialised domain known as an 'active site'...

Answered by Michael J. • Biology tutor

7351 Views

Explain how skeletal muscle contraction is stimulated

A nerve impulse travelling down a motor neurone causes the release of acetylcholine from the synpatic knob into the synaptic cleft. This then diffuses across the synaptic cleft down its concentration grad...

Answered by Michael J. • Biology tutor

3873 Views

What are the four main processes that occur in spermatogenesis within the testes?

1.Mitosis: division of germline epithelium (into spermatogonia)
2. Cell growth
3. Meiosis (2 divisons): results in four haploid daughter cells
4. Cell differentiation: forming sperm cells

Answered by Tutor20528 D. • Biology tutor

3183 Views

What is the difference between Areobic and Anaerobic Respriation

Areobic Respiration requires oxygen to release energy, producing water and carbondioxide as waste products according to equation belowC6H1206 + 6O2 = 6CO2 + 6H20Areobic respriation occurs in the mitochond...

Answered by Victoria E. • Biology tutor

7884 Views