CONNECTIVE TISSUE GLAND
ENDOCRINE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Touching a butterfly
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Brushing your hand against the side of your body
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Touching a hot stove
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Your legs moving as you walk
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Detailed explanation-1: -If you touch something that is very hot, your hand moves away quickly before you even feel the pain. You don’t have to think about it because the response is a reflex that does not involve the brain. A reflex is a rapid, unlearned, involuntary (automatic) response to a stimulus (change in the environment).
Detailed explanation-2: -Reflex arcs For example, a simple reflex arc happens if we accidentally touch something hot. Receptor in the skin detects a stimulus (the change in temperature). Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS.
Detailed explanation-3: -Coughing, yawning and blinking of eyes are examples of reflex actions.
Detailed explanation-4: -For example, if you touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away. Luckily, this neurological relay race happens in an instant.
Detailed explanation-5: -A girl picks up a hot plate. A reflex action causes her to drop it. The diagram shows some of the structures involved in this reflex action.