Which of the following is NOT associated with
Marfan syndrome?
a. skin lacking elasticity
b. loose joints
c. weakened aorta
d. short stature
e. mutated fibrillin gene
D
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The echiuran Urechis is also known as:
a. the peanut worm. b. the lugworm. c. the innkeeper worm. d. the beardworm. e. the fan worm.
Which statement is true?
1.The hydrogen bonding of cytosine to guanine is an example of complementary base pairing. 2.Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. 3.Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. 4.When adenine base pairs with thymine, they are linked by three hydrogen bonds. 5.In the DNA of all species, the amount of cytosine never equals the amount of guanine.
Outline three properties of genes for which the Watson–Crick model offers an explanation. What will be an ideal response?
You are caring for a 40-year-old man who was exposed to an unknown chemical and has been appropriately decontaminated by the hazardous materials team. The patient responds to pain only, is incontinent of urine and feces, and has a heart rate of 40 beats/min and weak. Further assessment reveals that his breathing effort is poor and his blood pressure is low. After taking standard precautions, the MOST appropriate treatment for this patient involves:
A) protecting his airway with an ET tube, monitoring his cardiac rhythm, establishing vascular access, initiating an epinephrine infusion at 2 µg/min, and considering 0.5 mg of atropine. B) assisting his ventilations with a bag-mask device and 100% oxygen, performing intubation if necessary, establishing vascular access, applying the cardiac monitor, and administering atropine and pralidoxime. C) applying high-flow oxygen via nonrebreathing mask, establishing vascular access, applying the cardiac monitor, attempting immediate transcutaneous cardiac pacing, and administering several 20-mL/kg boluses of normal saline. D) immediately administering 2-PAM chloride, applying supplemental oxygen via nonrebreathing mask, establishing vascular access, administering crystalloid fluid boluses to increase his blood pressure, and monitoring his cardiac rhythm.