Which event listed above is the point at which myasthenia gravis interrupts the process? Explain why.

Demyelination is the loss of myelin from neurones that are normally myelinated. Multiple sclerosis is a disease in which demyelination occurs in neurones involved in coordinating muscle movement.   Using your knowledge of nerve impulse generation and propagation, explain how nerve impulse generation and propagation would be affected in people who have multiple sclerosis. The explanation needs to be in the form of a step by step sequence of annotated drawings. This could be in the form of an annotated cartoon/picture strip. Compare this to nerve impulse generation and propagation in an individual who does not have multiple sclerosis.

Which of the following statements about action potentials and information transmission in the synaptic cleft is FALSE? 1. Action potentials determine the amount of neurotransmitters that are released into the synaptic cleft 2.Action potentials ultimately result in more calcium leaving the target cell at the postsynaptic membrane 3. Action potentials determine the duration that neurotransmitters are released into the synaptic cleft 4. Action potentials ultimately result in more calcium entering the neuron at the axon terminal

Which of the following lists the components of a reflex arc in the order in which nerve signals pass through them? Sensory receptor -> motor neuron -> interneuron -> sensory neuron -> effector. Effector -> sensory neuron -> interneuron -> motor neuron -> sensory receptor. Sensory receptor -> interneuron -> sensory neuron -> motor neuron -> effector. а. b. c. Sensory receptor -> sensory neuron -> interneuron -> motor neuron -> effector. d. The ventral root of spinal nerves contains sensory neurons. motor neurons. а. b. c. efferent neurons. d. interneurons.