Both the nervous and endocrine systems play a vital role in the survival of a person. They send messages to target areas in order to support life. The messages sent by the nervous system which are being released into a synapse are called neurotransmitters while the ones sent by the endocrine system via the bloodstream are called hormones.
Alcohol can be detectable in a urine analysis after drinking from 12 to 48 hours. :}
<span>Slow twitch muscle fibers. They help enable long endurance, which would be useful for marathon length running.
Skeletal muscle fiber is encircled by a plasma membrane called the sarcolemma, which holds sarcoplasm, the cytoplasm of muscle cells. It gives the cell its striated appearance.</span>
<span>To get the most use from your exercise, stay in your target heart rate range for at least 20 minutes during an exercise session.</span>
