stimulus

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MIA6
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stimulus

Post by MIA6 » Sun Mar 11, 2007 2:19 am

There was a multiple-choice question that I didn't get it right.
What is one characteristic of a stimulus? <I will only give you two choices because I felt only these two choices could be possibly the right answer>
1. It may be synthesized in a dendrite. 2. It may initiate an impulse.
I felt number two may be right but i thought a stimulus didn't initiate an impulse but it gave to dendrite, and then dendrite initiates an impulse, so i chose 1, synthesized in a dendrite, because i thought the stimulus passed to dendrite.... but the correct answer was 2, so hope you can analyze it for me, tell me why number 1 was wrong, and why my understanding was wrong. thanks.

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Revenged
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Post by Revenged » Sun Mar 11, 2007 11:50 am

Yes, it's 2... A stimulus initiates a nerve impulse...

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rosalin
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Post by rosalin » Sun Mar 11, 2007 11:58 am

basically, a stimulus is a change in the environment of an organism that the organism can detect and respond to. These changes may be noise, light, heat, or pressure.

so the stimulus is externally produced & is not something that is synthesised internally.

stimuli initiate impulses. which means that they 'stimulate' the nervous system to produce a response.

so i guess # 2 is correct.
there is no element of genius without some form of madness.

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