HES 202: Midterm #1 questions with complete solutions

What do the semicircular canals sense Correct Answer-Angular velocity Blank is the component of the motor neuron where the excitatory post-synaptic potentials summate to generate an action potential? Correct Answer-Axon Hillock What neurons are cutaneous mechanoreceptors innervated by? Correct Answer-A: Ab What would be the benefit of low threshold (type 1) motor neurons or small motor neurons innervating slow oxidative muscle fibers/ large motor neurons and high threshold (type II) motor neurons innervate fast contracting, fast fatigable of fast glycolytic muscle fibers? Correct Answer-Endurance, relevant amounts of force, and relevant speeds of force, and that type 1 is used before type 2 i.e fast contracting are in reserve What is a motor unit? Correct Answer-A motor neuron and all of the muscle fibers it innervates What is the size of a motor unit proportional to? Correct Answer-Muscle fiber size