Question 1
After stretching an intrafusal fiber, the next event is
◦ a decrease in muscle tone.
◦ an increase in action potentials along the associated sensory neuron.
◦ a decrease in muscle tension.
◦ decreased sensitivity to stretching.
◦ All of the answers are correct.
Question 2
When there is a resistance to stretch produced by a given limb muscle,
◦ intrafusal fibers receive fewer action potentials from the gamma motor neurons.
◦ gamma motor neurons are inhibited by higher brain centers.
◦ the muscle involved in the movement immediately shortens when stimulated.
◦ there is a decrease in the amount of force generated by extrafusal muscle fibers.
◦ muscle tone is increased and more motor units are recruited to the contraction.
Diaphragm, the major muscle of breathing.
Trapezius muscle movement
Muscle Tissue
Crosscut of Muscle Fibers
ATP Production in Cardiac Muscle
bunny muscle