Over a million students use our free study notes to help them with their homework
The myelin sheath is a fatty substance which surrounds and insulates neuron axons (i.e. it does not allow potassium or sodium ions to pass through it), which allows fast propagation of action potentials a...
A synapse is a junction between two neurones where they meet. It is a very small gap which chemicals diffuse across so the signal can transmit to or from the CNS.
would draw diagram to demonst...
One component is the nucleus. This organelle contains the genetic information of the cell, in the form of DNA.
Another component is the mitochondira. This is the site of respiration in the cell and...
ADH (antidiuretic hormone) is a hormone that targets the kidney. It triggers the insertion of aquaporins into the walls of the collecting duct.
When the water concentration in the body is too low (...
Enzymes are biological catalysts. This means they spead up chemical reactions in the body. To understand why they might stop working, you must first look at the structure. Enzymes are proteins made up of ...
←
701
702
703
704
705
→
Internet Safety
Payment Security
Cyber
Essentials
