Top answers

Explain the similarities and differences between plant and animal cells structure and shape (may include use of a diagram and bullet points are accepted).

The similarities are:Cell cytoplasmNucleusCell membraneMitochondriaRibosomesStructures unique to plant cells (with a few exceptions):ChloroplastsCell wallsLarge permanent vacuoleAnimal cells tend to be varia...
JL
Answered by Jessica L. • Biology tutor
4881 Views

Describe the development and propagation of an action potential in response to a stimulus (6 marks)

1. stimulus excites membrane so Na + channels open, membrane becomes more permeable to Na + so Na + diffuse into neurone down electrochemical gradient. Inside of neuron becomes less -ve 2. Depolarisation : i...
SW
Answered by Simmy W. • Biology tutor
3282 Views

Describe the relationship between different hormones regulating the menstrual cycle?

There are 4 main hormones regulating the menstrual cycle. We can split them into 2 groups: FSH (follicle stimulating hormone) and LH (luteinising hormone) made by the pituitary gland, and oestrogen and proge...
VK
Answered by Valeriya K. • Biology tutor
4282 Views

Give a basic overview of the of the digestive system.

The digestive system is a tube starting from the mouth and ending at the anus. Between are different compartments with different roles. The first stage of digestion occurs in the mouth. The teeth grind the f...
NV
Answered by Nirali V. • Biology tutor
3844 Views

Describe the similarities and differences between ultrafiltration in the kidneys and the formation of tissue fluid.

Both are processes which involve the filtration of small molecules (such as water, glucose, amino acids) out of capillaries, while larger molecules, proteins and cells (such as red blood cells) remain in the...
MG
Answered by Mollie G. • Biology tutor
26406 Views