What is the main reason a patient with Parkinson disease cannot be treated with dopamine?
A. Acetylcholine is the main neurotransmitter that is deficient.
B. Injecting dopamine only makes the substantia nigra down-regulate its own production of dopamine.
C. Dopamine is highly addictive, creating a dependence in the patient that is worse than Parkinson disease.
D. Dopamine cannot cross the blood-brain barrier, and it has too many systemic side effects.
E. Dopamine is a protein that is digested in the stomach before it can enter a person's circulation.
D
You might also like to view...
Thyroid hormones bind to receptors that ________.
A. regulate gene transcription B. stimulate production of diacylglycerol C. activate tyrosine kinase D. stimulate production of cyclic AMP
Which of the following are used in "metabolic crossroads" ?
a) Pyruvic acid b) Glycogen c) Ribose d) ATP e) Lipase
Assuming all other values are normal, calculate the net filtration pressure in a patient with a drop in capsular hydrostatic pressure to 8 mmHg.
A. 50 mm Hg out B. 30 mm Hg out C. 20 mm Hg out D. 40 mm Hg out E. 10 mm Hg out
In contrast to secondary spinal cord injury, primary spinal cord injury occurs:
A) from progressive swelling. B) at the moment of impact. C) from penetrating mechanisms. D) within 24 hours of the injury.