Chapter 14: Part 3

Question 1

what is the most common metabolic disorder?

Answer 1

PKU-i, can result in severe mental retardation

Question 2

what cause PKU-i?

Answer 2

It is caused
by inherited lack of the enzyme that converts phenylaline into tyrosine; therefore, there is an excessive amount of phenylaline, which interferes with neuron myelination in the CNS

Question 3

what is another metabolic disorder?

Answer 3

Tay-Sachs Disease

Question 4

what is tay-sachs disease?

Answer 4

this occurs when the brain swells and damages itself against the skull

Question 5

what is neurological symptoms of tay-sachs disease?

Answer 5

exaggerated startle response to sounds, listlessness, irritability, spasticity, seizures, dementia and then death. There is no successful treatment.

Question 6

what cause Down syndrome?

Answer 6

it is a congenital disorder that causes abnormal development, caused by an extra 21st chromosome