Hearing the alarm: Somatic Sensory Nervous System
Smelling the coffee: Somatic Sensory Nervous System
Stretching and yawning: Somatic Motor Nervous System
Salivating: Autonomic Parasympathetic Motor Nervous System
Stomach rumble: Enteric Motor Nervous System
Reference
Tortora, G. J., & Derrickson, B. (2017). Principles of anatomy & physiology. Fifteenth edition; Wiley Loose-Leaf Print Companion. Hoboken, New Jersey, John Wiley & Sons, Inc.