Top answers

Outline an example of a reflex action

Stimulus - receptor - sensory neuron - (dorsal) spinal cord - (ventral) spinal cord - motor neuron - muscle/effector - response
TA
Answered by Tunmise A. • Biology tutor
3057 Views

Explain how increased blood CO2 leads to an increased heart rate

The high CO2 rate is detected by chemoreceptors in the aorta. The chemoreceptors send impulses to the medulla in the brain. The medulla then sends impulses along sympathetic neurons to the sinoatrial node in...
AV
Answered by Alice V. • Biology tutor
13089 Views

Explain how the mitochondria plays an important role in sustaining life?

The mitochondria is an organelle important for aerobic respiration. This is a process which uses glucose and oxygen to produce adenosine triphosphate, carbon dioxide and water. ATP is a molecule needed to pr...
FW
Answered by Felyx W. • Biology tutor
2959 Views

Explain how the properties of water, that are essential to living things, arise from the 
dipolar nature of water

a oxygen in water ‹ slightly › negatively charged and hydrogens ‹ slightly › positive b hydrogen bonding due to the dipolar nature c water molecules are cohesive due to hydrogen bonding d cohesion useful in ...
Answered by • Biology tutor
5808 Views

What is a Pacinian corpuscle and how does it work?

The Pacinian corpuscle is a mechanoreceptor, which means it is a sensory receptor that responds to touch, pressure or vibration. Pacinian corpuscles are found deep in the skin, and respond to both pressure a...
Answered by • Biology tutor
20248 Views