Genetics is the study of genes, heredity, and genetic variation in living organisms. It is generally considered a field of biology, but it intersects frequently with many of the life sciences and is strongly linked with the study of information systems.he modern working definition of a gene is a portion (or sequence) of DNA that codes for a known cellular function or process (e.g. the function make melanin molecules). A single 'gene' is most similar to a single 'word' in the English language.
Adrenaline is produced in the medulla in the adrenal glands as well as some of the central nervous system's neurons. Within a couple of minutes during a stressful situation, adrenaline is quickly released into the blood, sending impulses to organs to create a specific response. What is the function of adrenaline? Adrenaline triggers the body's fight-or-flight response.
1 An adrenal tumor that creates extra adrenaline is a pheochromocytoma. 2  This kind of tumor is located in the inner part of the adrenal gland. 3  It can cause high blood pressure, headaches, panic attacks, and heart palpitations.