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Describe the mechanism of mammalian breathing.

The process of breathing is made up of two components: Inhalation Exhalation Inhalation is the process of filling the lungs with air. As they fill they expand and so the rib cage moves upwards and outwards. ...
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Answered by Rebecca R. • Biology tutor
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The black mamba’s toxin kills prey by preventing their breathing. It does this by inhibiting the enzyme acetylcholinesterase at neuromuscular junctions. Use your knowledge of muscle contraction to explain how this prevents breathing.

By inhibiting the enzyme acetylcholinesterase, the neurotransmitter acetylcholine does not get broken down. This causes acetylcholine to build up in the synapse between the motor neurones and muscles of resp...
TC
Answered by Tashi C. • Biology tutor
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Outline the importance of the junctions between neurones in the functioning of the nervous system

DEFINE: Key words What is a junction, what is a neurone and what is the nervous system? So, the nervous system connects all the nerve cells and fibres which transmit nerve impulses from one part of the body ...
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Answered by Natasha K. • Biology tutor
7518 Views

What is negative feedback?

Firstly you have a change away from optimum conditions, for instance a decrease in internal body temperature, which is detected by a receptor. The receptor relays this infromation down the communication path...
JB
Answered by Josephine B. • Biology tutor
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Describe the process that converts a genetic sequence on messenger RNA into the primary sequence of a protein

After the mRNA has exited the nucleus through the nuclear pores. Translation begins with the mRNA entering the ribosome. Next tRNA uses its three unpaired bases to bond with a specific amino and bring it to ...
KY
Answered by Katherine Y. • Biology tutor
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