Top answers

Explain the process that occurs in neuromuscular junctions from when the action potential in the pre-synaptic knob to transmission in the next neurone (6 marks).

The action potential in the pre-synaptic neurone causes calcium ion channels to open This causes calcium ions to diffuse into the neurone, down its concentration gradient This causes vesicles containing acet...
HE
Answered by Holly E. • Biology tutor
3121 Views

Describe the process of osmosis

Osmosis is the movement of water molecules from a high partial pressure (or concentration) to a low partial pressure (or concentration) down a partial pressure (concentration) gradient. For example, think of...
AF
Answered by Alisha F. • Biology tutor
3967 Views

How does not completing a course of antibiotics lead to increased immunity within a population of bacteria?

As you take the antibiotics, it begins to kill bacteria causing infection within your body, however not all bacteria are created equal, and some are more resilient to the antibiotics than others. Naturally, ...
RI
Answered by Rob I. • Biology tutor
3253 Views

How does the body control its temperature?

Thermoregulation is an example of homeostasis - the process by which the body maintains an optimum state. The body must maintain a stable temperature because extreme lows and highs of temperature can affect ...
DA
Answered by Dasha A. • Biology tutor
6034 Views

Explain why parents, who do not have cystic fibrosis, can have a child with cystic fibrosis.

Because cytic fibrosis is a recessive genetic disease, both parents can be carriers therefore having Ff genotypes. If a punnett square is drawn, it can be seen that offspring with the genotypes FF, Ff and ff...
SA
Answered by Sama A. • Biology tutor
4086 Views