A bee was found inside of my car while I was on the way to class. It reoriented its body to the driver’s side and landed on the steering wheel. This caused me to react in fear. An instantaneous physiological response occurred from the sympathetic branch of my autonomic nervous system. As a result my heart rate increased, adrenaline was released, the sweat glands on my hands were stimulated and my muscles began to contract at a rate in which my body began to shake. Action potentials were occurring at a higher frequency in order to prepare my body to escape from the stressful situation. In this state, my levels of blood calcium increased and the amygdala in my brain triggered activity in the hypothalamus. The stimulation in my hypothalamus sent signals to the pituitary gland to release the ACTH hormone into my blood.
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