Psio 305 Exam 1 1 Study Notes Juvenile Delinquency - Q&a

What is a fast fatiguable motor unit's diameter, force velocity, metabolism, and fatiguability? {Ans: moderate, fast, glycolytic, fatiguable}Imagine a "fast" muscle and a "slow" muscle and their associated nerves. If their nerves are exchanged, which of the following events could occur? (check all that apply) 1 The slow muscle may begin to synthesize fast myosin isoforms. 2 Motor neurons will begin to release dopamine 3 Agrin release will increase and acetylcholine receptors will disperse 4 The fast muscle will begin to exhibit the slow force-production properties typical of slow muscle 5 No change will occur {Ans: 1 The slow muscle may begin to synthesize fast myosin isoforms. 4 The fast muscle will begin to exhibit the slow force-production properties typical of slow muscle}What is spatial summation? {Ans: •Simultaneous arrival of multiple inputs, Spatially separated -if one at a time: small voltage change for each channel alone -If simultaneous: Voltage change reflects the sum of the ion flux through all theopen channels.}Neurotransmitters released into a synapse will bind to post synaptic receptors that could mediate their effects through:(check all that apply) 1 catalytic receptors 2 GPCRs 3 ligand-gated ion channels 4 nuclear receptors {Ans: 2 GPCRs 3