Top answers

Why does our heart rate increase when we run compared to when we are sitting?

Running demands a lot of energy in our leg muscles in order for them to contract and relax. Energy is released in the process of respiration which breaks down glucose into ATP. The equation for respiration i...
AM
Answered by Ayesha M. • Biology tutor
4304 Views

Describe the structure and function of plasma membranes.

All plasma membranes are composed of phospholipids, cholesterol, proteins, glycoproteins and glycolipids. The structure of the membrane can be described by the fluid mosaic model, where phospholipids are arr...
MJ
Answered by Milly J. • Biology tutor
9345 Views

Define ADH and describe the mechanism of its action

ADH stands for anti-diuretic hormone. It is a hormone that increases the permeability of the distal convoluted tubule and the collecting duct to water ADH is produced in the hypothalamus and stored in the pi...
VS
Answered by Victoria S. • Biology tutor
5562 Views

What type of cells do multipotent stem cells go on to form?

Multipotent stem cells --> haematopoeitic adult stem cells
SF
Answered by Skye F. • Biology tutor
2337 Views

What are the advantages and disadvantages of sexual reproduction?

Sexual reproduction has many evolutionary advantages. These include: (1) a genetic variation in offspring that is not seen with asexual reproduction. (2) The variation allows the species to adapt to changes ...
LW
Answered by Lois W. • Biology tutor
47980 Views