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When an enzyme is inhibited it means that the specific substrate that normally fits in the enzymes active site can no longer bind due to the active site having changed shape or having been blocked.
C...

At low temperature, there is low kinetic energy (=molecules move more slowly). So, an enzyme and a substrate are less likely to randomly collide with eachother (similarly...

To expand the lungs and fill them with air, thoracic pressure decreases. This is done by the diaphragm contracting and flattening out and the external intercostal muscles raising the ribcage upwards and o...

Unlike mammals fish have water as their gas exchange medium instead of air. Fish use gills for gas exchange, gills are specialised flaps of tissue which have the following features to allow efficient gas ...

• basic anatomy of the heart: chambers, valves, structural difference between right and left side of the heart
  
• pulmonary vs. systemic circulation
  
• blood flow through the h...