Top answers

Biology
A Level

Explain synaptic transmission at a cholinergic synapse.

A synapse is a gap between neurons that allows communication between different neurons using chemical messengers or neurotransmitters. Let's start simple and describe the...

MM
Answered by Maaz M. Biology tutor
7729 Views

Describe the changes that take place to maintain glucose concentration in exercise.

During exercise, blood glucose concentration falls due to the increased energy demand and glucose uptake of skeletal muscles. This fall in glucose concentration is detected by the alpha and beta cells in ...

HB
Answered by Henry B. Biology tutor
2596 Views

Describe the structure of DNA

Deoxyribonucleic acid (DNA) is the hereditary material in almost all organisms and is responsible for carrying out genetic instructions in the cell. DNA is a polymer of nucleotides and each nucleotide has...

JP
Answered by Joe P. Biology tutor
2572 Views

Briefly describe the structure and function of the membrane-bound organelles present in a mammalian cell.

Nucleus - This is the largest organelle within the cell and contains all the cell's genetic information (with the exception of the mitochondrial genome). Structurally, it has a double membrane, known as t...

EF
Answered by Elizabeth F. Biology tutor
8521 Views

How do expiration and inspiration occur by the action of the lungs?

Inspiration: The first stage of inspiration is contraction of the diaphragm, which causes it to move downwards, and contraction of the external intercostal muslces (the muscles between the ribs), w...

LB
Answered by Lois B. Biology tutor
2967 Views

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