Nerve and Muscle Physiology — Flashcards

_____ motoneuron lesions may cause decreased tone

_____ of the knee is brought by the action of vastus medialis muscle.

In the muscle stretch reflex, stretch increases afferent impulses via _____ and II nerve fibers

Stretch reflex:Activation of _____ motor neurons leads to direct contraction of the muscle

The _____ in neurons, known as Nissl bodies, synthesize peptide neurotransmitters for secretion

A sustained contraction with little expenditure of energy is made possible by a _____ mechanism in smooth muscle

Stretch reflex:Input from the muscle spindle afferents _____ and II, activate the alpha motor neurons, which innervate the extra-fusal fibres

Post-ganglionic sympathetic neurons utilize _____ as a neurotransmitter in sweat glands

Autonomics _____ Ach receptors are ligand-gated Na+/K+ (ion) channels

The first step of muscle contraction occurs when the _____ neuron depolarizes, opens Ca2+ channels and ACh is released into the motor end plate.