Endocrine System and Adrenaline Production

In the human body, the endocrine system plays a crucial role in regulating various functions by secreting hormones. These hormones are chemical messengers that travel through the bloodstream to target organs and tissues. Understanding the basic components of the endocrine system is essential for comprehending how our bodies maintain homeostasis.

Which of the following glands is primarily responsible for producing and releasing adrenaline, a hormone that is crucial during stress responses such as the 'fight or flight' reaction?