Answer:
The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarization, where the potential of the cell is higher than the cell's resting potential. The sodium channels close at the peak of the action potential, while potassium continues to leave the cell.
Answer:
<em>Antibodies</em><em> </em><em>are</em><em> </em><em>produced</em><em> </em><em>by</em><em> </em><em>lymphocytes</em><em> </em><em>since</em><em> </em><em>it</em><em> </em><em>is</em><em> </em><em>part</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>immune</em><em> </em><em>system</em><em> </em>
Answer:
TRUE
Explanation:
Alzheimer's is a progressive degenerative disease that causes cognitive and memory impairment, as well as a variety of neuropsychiatric symptoms and behavioral changes that worsen over time. The causes of alzheimer's are still unknown, but researchers believe that for most people, Alzheimer's disease is caused by a combination of genetic, lifestyle and environmental factors that affect the brain over time.
Thus, there is a linear relationship between age and onset of alzheimer's, the older a person, the greater the chance of the disease to manifest. Usually the disease comes after age 75. The case of Sally's mother, who was diagnosed at a very young age at 50, gives evidence that her illness is manifested by genetic factors.
