Need help for a science test?

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Catarina F

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5.If you put your hand in very hot water by mistake, you automatically move it quickly from the heat.
a.What do you call this type of automatic action?


b.You have heat sensors just beneath your skin. How are your muscles ´told´ to move your hand from the hot water?
 
This is called a reflex response and goes something like this:

STIMULUS -> RECEPTOR -> SENSORY NEURON -> RELAY NEURON -> MOTOR NEURON -> EFFECTOR -> RESPONSE

In a reflex response, the stimulus (HOT WATER) is detected by the receptor which sends a signal to the central nervous system.
If the water is extremely hot, the receptor will fire very rapidly and the above reflex arc will be followed.

In this, the receptor sends a signal through the sensory neuron to the CENTRAL NERVOUS SYSTEM (CNS). Under normal conditions, this information is normally sent to the spinal cord and then up to the brain to be processed. This however takes time and when their is danger, the signal is processed immediately in the spinal cord by a relay neuron which itself sends a signal via the motor neuron, to the effector (MUSCLE), causing a rapid contraction and the removal of your hand from the hot water.

Hope that makes sense.
 
This is called a reflex response and goes something like this:

STIMULUS -> RECEPTOR -> SENSORY NEURON -> RELAY NEURON -> MOTOR NEURON -> EFFECTOR -> RESPONSE

In a reflex response, the stimulus (HOT WATER) is detected by the receptor which sends a signal to the central nervous system.
If the water is extremely hot, the receptor will fire very rapidly and the above reflex arc will be followed.

In this, the receptor sends a signal through the sensory neuron to the CENTRAL NERVOUS SYSTEM (CNS). Under normal conditions, this information is normally sent to the spinal cord and then up to the brain to be processed. This however takes time and when their is danger, the signal is processed immediately in the spinal cord by a relay neuron which itself sends a signal via the motor neuron, to the effector (MUSCLE), causing a rapid contraction and the removal of your hand from the hot water.

Hope that makes sense.
 
This is called a reflex response and goes something like this:

STIMULUS -> RECEPTOR -> SENSORY NEURON -> RELAY NEURON -> MOTOR NEURON -> EFFECTOR -> RESPONSE

In a reflex response, the stimulus (HOT WATER) is detected by the receptor which sends a signal to the central nervous system.
If the water is extremely hot, the receptor will fire very rapidly and the above reflex arc will be followed.

In this, the receptor sends a signal through the sensory neuron to the CENTRAL NERVOUS SYSTEM (CNS). Under normal conditions, this information is normally sent to the spinal cord and then up to the brain to be processed. This however takes time and when their is danger, the signal is processed immediately in the spinal cord by a relay neuron which itself sends a signal via the motor neuron, to the effector (MUSCLE), causing a rapid contraction and the removal of your hand from the hot water.

Hope that makes sense.
 
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