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Nervous Nellie Circuit Lesson Summary: Neurons, or nerve cells
Nervous Nellie Circuit Lesson Summary: Neurons, or nerve cells

... 8. Ask students to describe how they knew which neurons were excitatory and inhibitory. 9. Ask students to write a reflection paragraph that describes how working with the Virtual Neurons software helped them learn about neurons and neuronal communication. 10. Ask for volunteers to share their refle ...
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File

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The Nervous System
The Nervous System

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UNIT 2 REVIEW GUIDE *Be able to identify/label parts of the neuron
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Are We Paying Attention Yet?
Are We Paying Attention Yet?

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Introduction - Florida Atlantic University

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questions from - AP Psychology: 6(A)

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Brainfunction - Oakton Community College

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The BRAIN - davis.k12.ut.us

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LPN-C

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Stimulus (physiology)



In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.
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