During the patellar reflex, you measure voltage change in the flexor muscle motorneuron cell body in the ventral horn of the spinal cord. After stimulation of thestretch receptors, which of the following would you observe?An EPSPAn action potentialAn IPSPNo change in voltage

The L2, L3, and L4 spinal cord segments are tested by the patellar reflex, also known as the knee…

Answered: During the patellar reflex, you measure…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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When describing the reflex arcs and the neural pathways involved we often limit ourselves to the nerves carrying information from the muscle or tendon to the spinal cord and back. However, it should be clear from our ability to feel the tendon tap as well as the results from the Jendrassik’s maneuver test that it isn’t this simple. What other neural connections must be present ?
"After an action potential has just passed through the axon hillock, the voltage-gated Na+ channels there won t open for a period of time. However, if the stimulus is strong enough, another action potential can be triggered even during this resting time. This refers to" refractory resting period intermediate resting period relative refractory period absolute refractory period
Gray matter in the spinal cord seems that color because the cells are dead O contains the myelinated axons of motor neurons O contains the cell bodies and myelinated axons of sensory neurons contains the cell bodies of motor neurons
Sensory fibers, or pathways, are referred to as “afferent.” Motor fibers, or pathways, are referred to as “efferent.” What can you infer about the meaning of these two terms (afferent and efferent) in a structural or anatomical context?
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
_____ neurons carry impulses from the muscle to the CNS, while _____ neurons complete the loop by carrying impulses from the CNS to the muscle. Group of answer choices Sensory, motor Flexion, extension Input, output Synchronous, asynchronous
Using chopsticks to eat a meal requires visual guidance, while swiping a metrocard at the turnstile cannot be easily corrected once initiated. How and to what extent, might you expect the neural control of these movements to differ?
Do you think the patellar reflex would be inhibited or enhanced by actively contracting the quadriceps muscle group? With an understanding of how muscle spindle fibers work, explain how active contraction of a muscle might affect the myotactic reflex. [hint: try to elicit a knee jerk reflex when someone is doing a leg lift]
You are a famous researcher working in your lab. You isolate a piece of muscle (call it Muscle A) and examine its innervations. You find a short preganglionic neuron synapsing onto a long postganglionic neuron, which synapses onto the muscle. Then you examine Muscle B and find a single neuron innervating it. Remembering your favourite physiology class, you instantly recognize what types of neuronal connections you will find on both Muscle A and Muscle B. First give 2 characteristics of the synapse onto Muscle A. Then give 2 ways in which the synapse of Muscle B will be different.
Influx of ________ ions initiates neurotransmitter release into the synaptic cleft by the process of ________
Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential threshold
Neuroscience Students are celebrating the end of the year and have gotten together for a few ice-old Pepsi’s. Sarvesh holds out his mug for a refill and when Nicole starts to pour soda in, the mug slips down slightly but Sarvesh quickly recovers to prevent his mug from spilling. Which of the following does NOT occur in this reflex circuit?Group of answer choicesThe added load of the soda stretches the intrafusal muscle fibers of the bicepSensory neurons from the muscle spindle synapse onto α motor neurons and interneuronsThe rate of action potential firing increases in the muscle spindle fiberExcitation of motor neurons innervating the bicep muscleAll of the above *do* occur

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During the patellar reflex, you measure voltage change in the flexor muscle motor neuron cell body in the ventral horn of the spinal cord. After stimulation of the stretch receptors, which of the following would you observe? An EPSP An action potential An IPSP No change in voltage