The oldest client is at more risk for heart failure. A third heart sound is caused by a sudden reduction in the speed of blood flow from the left atrium to the left ventricle. It is said to be a normal phenomenon for young people and athletes but in older people who do not exercise, it indicates a congestive heart failure.
Answer:
Melanin is responsible for black colour of hair.
Explanation:
Hair is black in colour because it is determined by the amount of a pigment present in hair is called melanin. If eumelanin which is a type of melanin, present in hair, it gives people black or brown hair. If the receptor is not activated or is blocked in the hair, then melanocytes make pheomelanin instead of eumelanin and then the black or brown hair colour did not occurs so we can conclude that melanin is responsible for black colour of hair.
Sympathetic nervous system parasympathetic nervous system
A. a decrease in Oxygen
This is because trees take is Carbon Dioxide and they give off Oxygen. The more that trees are cut down the less oxygen we get.
