Top answers

How does air enter the lungs for inspiration? What does the body do to make this happen?

Intercostal muscles and the diapragm contract, which causes the ribs to move upwards and outwards. This increases the volume of the thorax, therefore lowering the pressure within the lungs. The pressure of t...
IR
Answered by Isobel R. • Biology tutor
6620 Views

What is a reflex action and along which pathway does it travel in the nervous system?

A reflex action is an automatic rapid involuntary response, which acts to protect the body from damage. Such as when you touch something extremely hot, you involuntarily remove your hand from the hot object....
IR
Answered by Isobel R. • Biology tutor
8223 Views

What is the difference between a nucleophile and an electrophile?

A nucleophile is a molecule or ion that donates a pair of electrons to form a new covalent bond. It is strongly attracted to a region of positive charge. Common nucleophiles include hydroxide ions; due to th...
LM
Answered by Liam M. • Chemistry tutor
23028 Views

What is a mole?

A mole is a unit of measurement for the amount of a substance. One mole is 6.02 x 10^23 particles in a substance, known as Avogadro's constant. This is because this is the number of atoms in 12g of Carbon- 1...
LM
Answered by Liam M. • Chemistry tutor
4312 Views

What is an enzyme?

An enzyme is known as a biological catalyst. This is because they can speed up reactions by providing an alternative pathway, lowering the activation energy of the reaction. They are normally composed of a p...
LM
Answered by Liam M. • Biology tutor
5249 Views