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Outline the role and organisation of the autonomic nervous system in mammals

The are two main areas of the autonomic nervous system are the sympathetic and the parasympathetic nervous systems. These are contrasting pathways and their main function is to regulate internal organ functi...
CT
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When a new antigen is presented to the immune system, an immune response leads to antibodies are released. The second time this happens it is much faster - explain why

In the primary immune response, there is antigen presentation followed by clonal selection, expansion and differentiation of helper t cells. This leads to plasma cells releasing antibodies and the developmen...
MR
Answered by Maxine R. • Biology tutor
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Explain the differences between active transport and facilitated diffusion.

Active transport is an active process meaning it requires the use of ATP, whereas facilitated diffusion is a passive process meaning it does not need ATP.To carry out the process active transport only requir...
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Answered by Niamh D. • Biology tutor
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How would cells produced by meiosis differ from those produced by mitosis?

The cells produced by meiosis would be haploid with half the number of chromosomes. The cells would be genetically different.
HB
Answered by Helen B. • Biology tutor
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Question relating to human adaptations to cold environments: In a cold environment, humans use shivering as a method of keeping warm. Describe and explain the process of shivering.

DESCRIBE aspect of the question: Shivering describes the involuntary contractions our muscles make when our core temperature starts to drop below 37 degrees Celcius. EXPLANATION: Actin and myosin filaments i...
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Answered by Shoomena A. • Biology tutor
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