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
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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
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
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.