31- which of the following is not always a component of a reflex arc: a- effector organ C- CNS b- afferent neuron d- Receptor

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10. How are visceral reflex arcs different from reflexes of the somatic nervous system?

Muscle fatigue has been suggested as one factor that can increase the chances of non-contact sports injuries, such as anterior cruciate ligament (ACL) tears. Notably, some researchers have noted a delay in the reflex response after muscle fatigue. With your understanding of the stretch reflex, which of the following is the most logical contributing factor to the injury? a. the distraction of the game causes inhibitory impulses to be sent down from the somatosensory cortex, so muscles are not operating at full capacity b. the proprioceptors adapt and become less sensitive c. there is an increase in time to muscle contraction after triggering a reflex

72. In the spinal cord, the myelin sheath around neurons is formed by the _____ -Swann cells -ependymal cells -oligodendrocytes -astrocytes