ASCP Phlebotomy Technician Certification Practice Exam 2025 - Free Phlebotomy Practice Questions and Study Guide

The correct choice focuses on hormones produced in the adrenal glands, specifically adrenaline (also known as epinephrine) and norepinephrine. These hormones are crucial for the body’s fight-or-flight response, which is triggered in situations involving fear or anger. When an individual perceives a threat, the adrenal glands release these hormones into the bloodstream, leading to physiological changes that prepare the body to respond. This can include increased heart rate, heightened alertness, and redirected blood flow to essential muscles, effectively enhancing survival during stressful situations.

In contrast to hormones, neurotransmitters primarily operate within the nervous system to transmit signals between nerve cells, rather than being secreted into the bloodstream as hormones are. Proteins encompass a broad range of molecules, and while they play numerous vital roles in bodily functions, they are not specifically involved in the acute physiological responses to fear and anger in the same way that hormones are. Enzymes, while critical for catalyzing biochemical reactions in the body, do not directly relate to the emotional responses of fear and anger triggered by the adrenal glands. Thus, hormones are rightly identified as the substances that play a key role in emotional responses linked to fear and anger.