A 10% to 20% reduction in brain weight and volume would MOST likely increase an older person's risk for:
A. stroke.
B. delirium.
C. dementia.
D. head trauma.
Answer: D. head trauma.
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While assessing a patient on a home mechanical ventilator, the low pressure alarm sounds. What would your immediate action be?
A) Start positive pressure ventilation with high-concentration oxygen B) Increase the rate of ventilation on the ventilator C) Check the ventilator tubing for kinking or obstruction D) Check the connections in the ventilator tubing and between the tubing and the tracheostomy for leaks
Which of the following hormones causes hypocalcemia?
A) thymosin B) calcitonin C) thyroid hormone D) parathyroid hormone
The chest wall interacts with the lung parenchyma via the ____.
A. alveoli B. pulmonary C. pleura D. bronchioles
Divide the following: 
A. +21 B. -21 C. +4 D. -4