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.
Adrenaline, like noradrenaline, is also used as a transmitter by some nerve cells to communicate with other cells (a neurotransmitter). Very little adrenaline is used in this way. Adrenaline is mainly released in response to stressful events to prepare the body for the âfight or flightâ response. These events lead to the activation of nerves connected to the adrenal glands, which trigger the secretion of adrenaline and thus increase the levels of adrenaline in the blood.