What maneuver is normally performed to prolong the duration of a breath-hold dive?
A. voluntary hypoventilation
B. voluntary hyperventilation
C. hyperventilation with helium
D. hyperventilation with carbon dioxide-oxygen mixture
Answer: B
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You are at the scene of a motor vehicle collision in which a single vehicle has collided with a tree. You note that the driver's side air bag has deployed. Which of the following is recommended by air bag manufacturers?
A) Lift the air bag and inspect the steering wheel for damage. B) Cut away the fabric portion of the air bag to get it out of the way. C) Sharply strike the front bumper to make sure the second air bag has deployed. D) Use a portable fan to ventilate the car to remove the powder from the air bag.
The intracranial pressure of an adult in the standing position approaches zero mmHg because:
A) the intracranial pressure changes due to the increased respiration rate of a person standing erect. B) as an adult moves from a recumbent position to a standing position the weight of the column of CSF is added incrementally to the pressure in the lumbar subarachnoid space and the intracranial pressure decreases. C) as an adult moves from a recumbent position to a standing position the weight of the column of CSF is added incrementally to the pressure in the ventricles of the brain, and the intracranial pressure decreases. D) the partial pressures of oxygen and carbon dioxide reach equilibrium, very nearly zero mmHg when a person stands up.
Which of the following vitamins are associated with disorders of homocysteine?
A) Folic acid, vitamin B6, vitamin B12 B) Vitamin B3 and vitamin B2 C) Vitamin D D) Vitamin C
List three of the state health department's responsibilities
What will be an ideal response?