The divisions of the nervous system involved in the responses are:
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Waking up to the sound of the alarm clock: Somatic nervous system (SNS)
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Stretching and yawning: Somatic nervous system (SNS)
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Salivating: Autonomic nervous system (ANS)
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Smelling of coffee: Somatic nervous system (SNS)
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Rumbling of the stomach: Enteric nervous system (ENS)
References:
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Tortora, G. J., & Derrickson, B. H. (2017). Tortora’s Principles of Anatomy & Physiology. Wiley.