Examining Skeletal Muscle Under a Microscope Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they allow for ...
Ultrastructure of Striated Muscle Striated muscle makes up the muscles in the body that are attached to the skeleton Striated muscle is made up of muscle fibres A muscle fibre is a highly sp...
Transmission Across a Neuromuscular Junction Striated muscle contracts when it receives an impulse from a motor neurone via the neuromuscular junction Neuromuscular junctions work in a very ...
Predicting the Effects of Drugs on a Synapse Chemical or drugs can have a major impact on the functioning of the brain and nervous system Some prescription drugs can have a beneficial effect...
Transmission Across a Cholinergic Synapse There are over 40 different known neurotransmitters One of the key neurotransmitters used throughout the nervous system is acetylcholine (ACh) Synap...
Cholinergic Synapses Where two neurones meet, they do not actually come into physical contact with each other – a very small gap, known as the synaptic cleft, separates them The ends of the ...
Calculating the Maximum Frequency of Impulse Conduction After an action potential passes through a section of an axon it undergoes a period of recovery and is unresponsive This is known as t...
Factors that Affect the Speed of Conduction The speed of conduction of an impulse refers to how quickly the impulse is transmitted along a neurone It is determined by multiple factors: The p...
The Refractory Period Very shortly (about 1 ms) after an action potential has been generated in a section of the axon membrane, all the sodium ion voltage-gated channel proteins in this sect...
