In multiple sclerosis, there is progressive and intermittent damage to the myelin sheath of central axons. One symptom is poor motor control of the affected area. Why does destruction of the myelin sheath affect motor control?
What will be an ideal response?
Loss of myelin slows or stops impulse conduction, preventing descending tracts from regulating spinal motor neurons, and leading to loss of coordination and the ability to correct for gravity, movement, and so on.
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Answer the following statement true (T) or false (F)
The left side of the heart pumps the same volume of blood as the right
Indicate whether the statement is true or false
The substance called sebum is commonly known as
A) regular sweat. B) earwax. C) milk. D) skin oil. E) odiferous sweat.
The suffix "-itis" means inflammation. Which of the following terms means inflammation of the membrane lining the body cavity that contains the liver?
A. pericarditis B. peritonitis C. pleurisy D. colitis E. hepatitis