Which reflex has an arc that is monosynaptic? O pain withdrawal reflex spindle stretch reflex pupil contraction reflex crossed-extensor reflex all of these reflexes none of these reflexes

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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**Question:**

Which reflex has an arc that is monosynaptic?

**Options:**

- ○ Pain withdrawal reflex
- ○ Spindle stretch reflex
- ○ Pupil contraction reflex
- ○ Crossed-extensor reflex
- ○ All of these reflexes
- ○ None of these reflexes

**Explanation:**

In the context of human physiology, a monosynaptic reflex involves a single synapse between the sensory neuron and the motor neuron. Out of the options provided, the spindle stretch reflex is typically the one that has a monosynaptic arc. This reflex, also known as the stretch reflex or knee-jerk reflex, involves direct communication between these two types of neurons.
Transcribed Image Text:**Question:** Which reflex has an arc that is monosynaptic? **Options:** - ○ Pain withdrawal reflex - ○ Spindle stretch reflex - ○ Pupil contraction reflex - ○ Crossed-extensor reflex - ○ All of these reflexes - ○ None of these reflexes **Explanation:** In the context of human physiology, a monosynaptic reflex involves a single synapse between the sensory neuron and the motor neuron. Out of the options provided, the spindle stretch reflex is typically the one that has a monosynaptic arc. This reflex, also known as the stretch reflex or knee-jerk reflex, involves direct communication between these two types of neurons.
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