Top answers

How do we pick up maximum marks in each question?

The first thing you should be doing when you read a question is to make sure that you understand exactly what it is asking from you for which subject knowledge is extremely important. Underlining or highligh...
AH
Answered by Amaarah H. • Biology tutor
6697 Views

Briefly describe the main differences between fast and slow twitch muscles and how does this relate to their specific functions.

First of all, slow-twitch (type I) muscle fibres have a large number of mitochondria allowing them to carry out aerobic respiration at a high rate by providing a site for the Kreb's cycle (taking place in th...
SG
Answered by Sebastian G. • Biology tutor
5149 Views

Describe the process by which an action potential is propagated across a cholinergic synapse

A cholinergic synapse is one which uses acetycholine (ACh) as it's neurotransmitter. When the action potential reaches the synaptic knob at the presynaptic cell it leads to voltage gated Ca 2+ channels in th...
DM
Answered by David M. • Biology tutor
3637 Views

The epithelial cells in the lungs are arranged into alveoli. Explain how the alveoli create a surface for efficient gaseous exchange.

Alveoli are made of two main types of cells. The alveoli walls are made of a single layer of squamous alveolar cells (aka Type I cells ), which are flat and thin, further shortening the diffusion distance. A...
YM
Answered by Yasamin M. • Biology tutor
5442 Views

Describe the process of natural selection.

Within any population, there is naturally variation between organisms because they all have differences in their genes. The organisms that are best suited to the environment that they live within are most li...
OA
Answered by Ollie A. • Biology tutor
7281 Views