When the γ-motor neuron discharge to a muscle decreases, it causes :-a- increased muscle spindle dischargeb- shortening of the spindle fibersc- stronger contraction of the extrafusal muscle fibersd- decreased spindle sensitivity to stretch

Skeletal muscle cells have a(n) receptor that is also adrenergic, muscarinic adrenergic, nicotinic cholinergic, muscarinic cholinergic, nicotinic

Which type of proprioreceptor is sensitive to changes in both muscle length and the speed of muscle contraction? Question 8 options:   golgi tendon organs   muscle spindles   pacinian corpuscle   end organs of Ruffini

Acetylcholine molecules are actively transported from the axon to their receptors on the muscle membrane by special transport proteins.

Increased sensory discharge from muscle spindles :-a- decreases muscle toneb- increases muscle tonec- could either increase or decrease muscle tone according to the muscle affectedd- has no effect on muscle tone

A half-second stimulation in the motor cortex produces what kind of result?A. Isolated muscle twitchesB. Contraction of a particular combination of musclesC. Contraction of whatever muscles are necessary to produce a particular outcomeD. Contractions of different muscles that vary unpredictably from one trial to another

Motor neurons have many functions, which include to: Carry a nerve impulse away from the CNS Send sensory information to the CNS Detect a stimulus from a sensory receptor Transmit a nerve impulse to an interneuron Take an impulse from an effector to a sensory neuron

Neuromuscular Junction: -Activation of nicotinic ACh receptors in the motor end plate results in both Na+ influx into and K+ efflux from the muscle fiber - An action potential in a motor neuron always produces a graded depolarization in the motor endplate and an action potential in the sarcolemma. -Acetylcholine released from the motor presynaptic terminal binds to voltage-gated ACh receptors in the motor endplate. -all of the above -a and b are right

The central ends of afferents from muscle spindles synapse with all the following types of neurons, except :-a- α-motor neurons of the same muscleb- γ-motor neurons of the same musclec- local interneuronsd- 2nd order neurons of ascending sensory pathways

One tretment for myasthenia gravis is a medication that blocks the activity of acetylcholinesterase. Why is this a successful treatment?