Basically, fear makes the body produce adrenaline, people lose their peripheral vision, coordination, the ability to think and react.

The article suggests that the McCoy family was predisposed to bad tempers because many of them had a pheochromocytoma which produced excess adrenaline and a tendency toward explosive tempers.

It's as if my body won't produce adrenaline because it doesn't want to hurt itself by letting me play.

During exercise, the body produces adrenaline, a natural stimulant.

To Achieve Euphoria: When you kiss, your brain responds by ordering your body to produce oxytocin, dopamine, serotonin and adrenaline.

During a stressful incident, the body produces adrenaline and the heart rate and blood pressure increase.

Stress produces adrenaline.

At some point he would have enough of being afraid; the glandular caps over his kidneys would stop producing adrenaline... The guard turned their eyes back to the ceiling.

Fighting the cobra had produced adrenaline, but now it ebbed, and her exhaustion and hunger were returning, stronger.

Afterwards, Dr. Phlox (John Billingsley) determines that the Orion women are emitting pheromones causing the crew to produce additional adrenaline.