Which gland secretes hormones that help a person react in dangerous situations?

The adrenal gland is primarily responsible for secreting hormones that help the body respond to stressful or dangerous situations. It does this by releasing adrenaline (epinephrine) and norepinephrine, which are critical in the "fight or flight" response. These hormones increase heart rate, elevate blood pressure, and boost energy supplies, all of which prepare the body to deal with emergencies.

In contrast, the pituitary gland mainly regulates other glands in the endocrine system and controls various body functions through hormone release, but it is not directly involved in immediate stress responses. The thyroid gland is responsible for regulating metabolism, growth, and development through hormones like thyroxine but is not involved in acute stress responses. The pancreas, which produces insulin and glucagon, is crucial for managing blood sugar levels rather than responding to danger. Therefore, the adrenal gland is the correct choice because of its direct involvement in the body's immediate reaction to stress or threatening situations.