The ratio of the activity of the SLRDs to the activity of the radon gas is called the Equilibration Ratio (ER). Equilibrium usually occurs in about three to four hours. When an individual receives a dose of one WL in 170 hours (a miner's month), the exposure then becomes called a working level month or WLM.adon and Health When radon decays, it too produces a decay chain, with its own daughters. During its decay, it releases a large atomic alpha particle and the atom is transmuted into polonium. An alpha particle is essentially an helium atom stripped of its electrons.
The somatic nervous system consists of nerves that go to the skin and muscles and is involved in conscious activities. The autonomic nervous system consists of nerves that connect the CNS to the visceral organs such as the heart, stomach, and intestines.It mediates unconscious activities.fferent, or sensory, neurons carry impulses from peripheral sense receptors to the CNS. They usually have long dendrites and relatively short axons. Efferent, or motor, neurons transmit impulses from the CNS to effector organs such as muscles and glands.
The names make it easy to picture: the brain and spinal cord are the hubs, while the sensory and motor nerves stretch out to provide access to all areas of the body. Put simply, sensory nerves send impulses about what is happening in our environment to the brain via the spinal cord.