Top answers

Explain how a small release of glucagon into the body can cause a rapid increase of blood glucose

A low level of glucose in the blood will stimulate secretion of glucagon to increase the amount of glucose in the blood. Glucagon causes the liver to release stores of glycogen to be converted to glucose. th...
ZH
Answered by Zainab H. • Biology tutor
3065 Views

What happens during the light-dependent reaction?

During the light dependent reaction, chlorophyll in the chloroplasts within a plant cell will absorb light energy, this will then excite electrons and an electron will be removed from the chlorophyll, once t...
DV
Answered by Deo V. • Biology tutor
5287 Views

Describe the flow of blood through the human circulation

Blood needs to circulate around the body in order to supply organs with nutrients and oxygen and to remove waste. Blood is oxygenated in small, one cell thick vessels in the lungs. These flow together to for...
AM
Answered by Antonia M. • Biology tutor
3568 Views

How does the body respond to a rise in temperature?

A rise in body temperature will be detected by the thermoregulatory centres in the hypothalamus. When the core body temperature exceeds 37 degrees C the blood vessels will dilate and shunt vessels will const...
HF
Answered by Hannah F. • Biology tutor
6015 Views

Describe the process of natural selection

A mutation occurs in the genotype of an organism. This results in a beneficial phenotype being expressed. This organism now has a survival advantage. Therefore, it will live longer. This means it will have m...
KO
Answered by Katherine O. • Biology tutor
3055 Views