Malignant hyperthermia is a hereditary disorder that can increase surgical risk, due to elevated temperature during certain types of anesthesia
The cause of the increased temperature is an increased cytosolic Ca++ level secondary to an anesthetic-induced:
A. increased Ca++ release from the SR, due to a mutation in the ryanodine receptor
B. decreased Ca++ uptake by the SR, due to a mutation in SERCA
C. increased frequency of rupturing of skeletal muscle fibers
D. decreased Ca++ extrusion, due to hyperphosphorylation of the plasmalemmal Ca++ pump
E. increased Ca++ influx, due to a mutation in N-type Ca++ channels
ANS: A
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The inferior aspect of the epiglottis attaches to the
A. thyroid cartilage. B. cricoid cartilage. C. hyoid bone. D. thyroid gland.
Which statement is the most correct regarding transcription/translation?
A) The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it. B) The nucleotide sequence in a mRNA codon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine. C) The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it. D) The nucleotide sequence in a tRNA anticodon is an exact copy of the DNA triplet that coded for it except that uracil is substituted for thymine.
Releasing hormones are produced by:
a. Adrenal glands b. Pituitary gland c. Hypothalamus d. Pineal gland
Why is vitamin D production by the skin important to the body?
A. Vitamin D protects the skin from UV light. B. Vitamin D is necessary for calcium absorption. C. Vitamin D adds strength to the skin, making it hard to penetrate. D. Vitamin D protects the skin from pathogens.