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TLS Online TPP Program

#Id: 3236

transitions, which are pyrimidine-to-pyrimidine and purine-to-purine substitutions, such as T to C and A to G;


#Unit 3. Fundamental Processes #DNA damage and repair mechanisms #Part B Pointers
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TLS Online TPP Program

#Id: 5481

#Unit 7. System Physiology – Animal

ACh diffuses across the synaptic cleft to the postsynaptic Membrane of motor end plate, which contains nicotinic receptors
TLS Online TPP Program

#Id: 5482

#Unit 7. System Physiology – Animal

The nicotinic receptor for ACh is an example of a ligand-gated ion channel
TLS Online TPP Program

#Id: 5483

#Unit 7. System Physiology – Animal

ACh is degraded to choline and acetate by acetylcholinesterase (AChE) on the motor end plate
TLS Online TPP Program

#Id: 5484

#Unit 7. System Physiology – Animal

Approximately 50% of the choline is returned to the presynaptic terminal by Na+-choline cotransport
TLS Online TPP Program

#Id: 1172

#Unit 7. System Physiology – Animal

The sensory receptors for vision are photoreceptors, located on the retina.
TLS Online TPP Program

#Id: 1173

#Unit 7. System Physiology – Animal

There are two types of photoreceptors:
Rods 
Cones