A disease that is characterized by progressive degeneration of nerve cells that control movement is called:
A) Parkinson disease.
B) amyotrophic lateral sclerosis (ALS).
C) Tay-Sachs disease.
D) Alzheimer disease.
A
Explanation: A) Correct.
B) ALS is characterized by muscle weakness, atrophy, with spasticity caused by degeneration of motor neurons of the spinal cord.
C) Tay-Sachs disease is an inherited, progressive disease marked by degeneration of brain tissue.
D) Alzheimer disease is a progressive degeneration of brain tissues that causes a slow decline in memory, thinking, and reasoning skills.
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Answer the following statement true (T) or false (F)
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Hair-like tail region of the sperm:
a. Cilia b. Sperm head c. Flagellum d. Fimbriae e. Calyx