You learn what letter your blood type is (A, B, AB, and O). You also learn what your Rhesus, or RH, factor is. Your blood is either RH+, meaning the blood has the RH factor, or RH-, meaning the RH factor is not in your blood.he c, e, and d genes are negative RH genes; meaning there is no RH factor in the blood. Research shows only the âDâ gene causes sensitivity issues, so itâs the D gene that is of concern during your pregnancy. Thatâs why some care providers call the RH factor RH (D) positive or RH (D) negative.
Definition of RETARDATION. 1. : an act or instance of retarding. 2. : the extent to which something is retarded. 3. : a musical suspension; specifically: one that resolves upward. 4. a: an abnormal slowness of thought or action; especially: mental retardation b: slowness in development or progress.
Put simply, arousal is the state of being physiologically alert, awake, and attentive. Arousal is primarily controlled by the reticular activating system (RAS) in the brain.The RAS is located in the brain stem and projects to many other brain areas including the cortex.esson Summary. To sum things up, arousal is the state of being alert, awake and attentive. It's mainly controlled by the RAS in the brain. It can influence our behavior by preparing us to respond to different things in the environment.