Answer:
when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle cell.
Answer:
The cardiovascular system delivers oxygen, nutrients, hormones, and other important substances to cells and organs in the body. It plays an important role in helping the body meet the demands of activity, exercise, and stress. It also helps maintain body temperature, among other things.
<span>The question says,'how long can it take before HIV symptoms are detected. The correct option is B, that is a couple of weeks. The most early symptoms of HIV infection usually show up between two to four weeks after the infection. This is due to the fact that it takes time for the virus to destroy enough body cells to the extent of generating the symptoms that accompany the infection. In some individuals, the symptoms may take up to three months before they occur, this is because HIV virus affect people differently. After the initial symptoms, the person may be living well for the next ten year before serious sysmptoms start to show up again.</span>
The beauty and boldly fluid is righ.
