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A woman accidentally touched a hot object - VCE - SSCE Biology - Question 14 - 2010 - Paper 1
Question 14
A woman accidentally touched a hot object. She withdrew her hand quickly in a reflex action. A model of the event is best represented by A. stimulus → sense organ →... show full transcript
Worked Solution & Example Answer:A woman accidentally touched a hot object - VCE - SSCE Biology - Question 14 - 2010 - Paper 1
Step 1
C. stimulus → sense organ → nerve impulse → central nervous system → response
Answer
The correct model to represent the reflex action begins with a stimulus (the hot object) activating a sense organ (such as skin receptors). This triggers a nerve impulse that travels to the central nervous system (CNS). The CNS processes this information and coordinates an appropriate response, which in this case is the withdrawal of the hand. This model does not involve endocrine glands or hormones, as the response in reflex actions is immediate and involuntary.