You have an accident in an organic chemistry lab and end up with a novel compound. This compound, when fed to rats, appears to stimulate dopamine secretion from the substantia nigra. You decide to try to market the drug to humans as a therapy to treat ________.
A. vertigo
B. loss of voluntary motor movement following a stroke
C. cerebellar disease
D. nicotine addiction
E. Parkinson's disease
Answer: E
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A patient is in the emergency room for a severe anxiety attack. Their doctor administers a dose of potassium to control their elevated heart rate. Why would potassium potentially be a treatment for the cardiovascular effects of an anxiety attack?
A. Excess potassium ion concentration causes decreased rate and decreased force of contraction. B. Excess potassium ion concentration directly signals the sympathetic nervous system to cease signaling to increase heart rate C. Excess potassium ion concentration causes decreased rate and increased force of contraction. D. Excess potassium ion concentration signals the parasympathetic nervous system directly to lower heart rate
Because humans stand and move upright, the term "dorsal" can be used in place of the term ________
A) Anterior B) Distal C) Inferior D) Posterior
At rest, the tropomyosin molecule is held in place by
A) actin molecules. B) myosin molecules. C) troponin molecules. D) ATP molecules. E) calcium ions.
Answer the following statements true (T) or false (F)
1. The pacinian corpuscle responds to pain. 2. The pacinian corpuscle responds to pressure. 3. The nail body lies hidden in a skinfold called the cuticle. 4. The layer of epithelial tissue directly under the nail is called the nail bed. 5. The crescent-shaped, white area near the root of the nail is called the lunula.