Top answers

Describe the reflex arc in response to the hand touching a burning hot stove. Include the names and a description of location and function of all neurons involved. Bullet points are sufficient.

All bold text gives marking points Stimulus (burning hot stove) Receptor (thermoreceptor in skin) detects stimulus Sensory neurone - relays sensory information in the form of electrical impulses from recepto...
JV
Answered by Jonathan V. • Biology tutor
5327 Views

In terms of pressure and volume, explain the changes that take place in the chest to allow ventilation to occur.

Think through inhalation and exhalation separately and the events step-wise. Be aware of the movements of your own chest when breathing in and out. Inhalation (breathing in):The external intercostal muscles ...
AH
Answered by Alice H. • Biology tutor
3160 Views

Describe the role of different structures (shown in the figure below) involved in the coordination of a reflex action and the sequence of events that occur(6 marks).

A receptor detects a stimulus and generates electrical impulses in response. Electrical signals are then conducted by a sensory neuron to the spinal cord. Neurotransmitter molecules then cross the synapse be...
LS
Answered by Laura S. • Biology tutor
3023 Views

What is the difference between mitosis and meiosis?

The main difference between the two types of cell divisions is that the purpose of mitosis is for cell growth and the purpose for meiosis is for sexual differentiation/reproduction. Mitosis occurs in somatic...
CS
Answered by Charlotte S. • Biology tutor
13756 Views

Explain the process of inspiration in humans

The diaphragm flattens and moves downwards and the intercostal muscles contract, moving the rib cage up and out. This increases the space inside the thoracic cavity. This reduces the pressure because there a...
CG
Answered by Charlotte G. • Biology tutor
7420 Views