down and takes her pulse, which is very fast (105 even though she hasn\'t been a
ID: 165986 • Letter: D
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down and takes her pulse, which is very fast (105 even though she hasn't been active for at least 30 min. Fearing the worst, Cheryl heads to hospital, where she learns that Angel's Trumpet pollen contains an anticholinergic agent that her systemic circulation via her eye and likely led to all symptoms. Soon she will be back to not As a medical resident at the hospital, you are asked to answer the following: The receptors for which neurotransmitter would be affected by the pollen? How would blocking these receptors result in the observed symptoms? Sensory information to the CNS follows the "law of specific nerve energies". Define this law. Clearly explain how the following examples these illustrate this law: Hitting your funny bone Phantom limb pain Why are all muscle fibers of a given motor units of the same type? Why are smaller motor units and slow-twitch muscle fibers used more frequently than larger motor units and fast-twitch fibers? Use an example in your explanation.Explanation / Answer
As a motor unit is made up of a motor neuron and the skeletal muscle fibers are innervated by that, therefore all muscle fibres of a given motor unit of the same type. Small motor units and low twitch muscle fibres produce less force than the large motor units and fast twitch muscle fibres. Collectively speaking as small movements in the body are comparatively larger than the larger movements therefore small motor and low twitch muscle fibres are more in use.
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