In a combination of excitatory or inhibitory synaptic connections the following is true it is poorly exemplified by the stretch reflex during a knee jerk in the stretch reflex circuit the biceps or flexor muscle gets activated in the stretch reflex circuit the quadriceps or extensor muscle gets activated an inhibitory interneuron inhibits the flexor motor neuron an inhibitory interneuron inhibits the extensor motor neuron motor neuron

In a combination of excitatory or inhibitory synaptic connections the following is true it is poorly exemplified by the stretch reflex during a knee jerk in the stretch reflex circuit the biceps or flexor muscle gets activated in the stretch reflex circuit the quadriceps or extensor muscle gets activated an inhibitory interneuron inhibits the flexor motor neuron an inhibitory interneuron inhibits the extensor motor neuron motor neuron

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 3TAHL

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The role of γ-motor neurons in regulation of equilibrium is achieved by :-a- initiating contraction of spindle fibers which directly antagonize postural deviationb- increasing spindle sensitivity to stretchc- directly stimulating extrafusal muscle fibers to antagonize postural deviationd- directly adjusting the discharge of α-motor neurons innervating the extrafusal muscle fibers to antagonize postural deviation
Which of the following statements are true with regards to the differences between a neuromuscular junction, and a standard central nervous system (CNS) synapse? Select all that apply. O The neuromuscular junction is a synapse between a neuron (alpha motor neuron) and a muscle fibre. CNS synapses connect two neurons. The graded potential generated by a neuromuscular junction has a much larger voltage than that of a CNS synapse. The structure of the neuromuscular junction ensures that an action potential in the alpha motor neuron always results in an action potential in the post-synaptic muscle fibre. CNS synapses do not guarantee this. The neuromuscular junction always uses Acetylcholine as a neurotransmitter, whereas CNS synapses may use a variety of neurotransmitters depending on their location and function
If depolarization occurs at the neuromuscular junction and threshold is met, then voltage-gated calcium channels in the axon terminal will open. voltage-gated acetylcholine receptors will open. acetylcholine receptors will open and close. ligand-gated channels will open nearby. voltage-gated sodium and voltage-gated potassium channels will open nearby.
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An autonomic neuroeffector junction Has the same structure as a somatic motor neuroeffector junction Uses only acetylcholine as a neurotransmitter Releases neurotransmitter from varicosities Does not require calcium for the release of the neurotransmitter
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In the knee jerk, contraction of quadriceps is accompanied by relaxation of the opposing flexor muscles. The contraction of quadriceps is mediated by a monosynaptic reflex (as stated above), and the relaxation of the antagonists is due to a dual connection reflex. The relaxation of antagonists is mediated by an inhibitory transmitter released by interneurones - these are called the la inhibitory interneurones, How do we name a dual connection reflex? monosynaptic disynaptic tricynaptic polysaccharide