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Which of the basic life processes is described here? The ability of multicellular organisms to regulate their internal environment so that it stays optimum for cellular survival.

Homeostasis
AM
Answered by Alice M. • Biology tutor
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Explain the processes that lead to the contraction of a single muscle

A nervous impulse travels to the neuromuscular junction and causes the release of acetylcholine into the synaptic cleft. Depolarisation of the motor end plate spreads through the muscle via transverse tubule...
PB
Answered by Prashan B. • Biology tutor
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How is the structure of a red blood adapted to its function?

Red blood cells are shaped like a biconcave disc - increases SA:volume ration -> increase surface for oxygen to diffuse in and out of cell Red blood cells are very small - 7um, compared with 40um average ...
NB
Answered by Norbert B. • Biology tutor
15574 Views

Explain the diffusion process of gas exchange in the lung during respiration

Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs. Blood travelling to the lungs is deoxygenated and instead of oxygen, carbon dioxide is bound to the red blood cells. Th...
CR
Answered by Calum R. • Biology tutor
14230 Views

What are the stages of mitosis?

Prophase - everything in the cell duplicates, and the chromosomes condense Metaphase - chromosomes align in the middle of the cell and spindle fibres attach to the centromere (part holding the two sister chr...
AM
Answered by Anya M. • Biology tutor
3174 Views