A chemistry student accidentally spills chlorine bleach into a dilute acid. The mixture reacts and produces fumes that are inhaled by the student and that reduce his ventilation. Assume that the gaseous chemical produced is a base (i.e., it releases OH- in an aqueous solution), and that the chemical is absorbed into the bloodstream at the alveoli. Explain why ventilation is reduced in the patient.
What will be an ideal response?
The physiological response is opposite that for acidosis. A decreased ventilation would reduce loss of CO2. By maintaining higher PCO2 in the blood, the resulting acidity would help to counteract the alkalinity resulting from the inhalation of a base.
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A 24-year-old male is seen for a routine physical examination. AT REST, he has a blood pressure of 120/80 mm Hg and a heart rate of 75 beats/min. He is advised to begin an exercise program
When he returns 3 months later, his heart rate has decreased to 50 beats/min (asymptomatic). Which of the set of values below would you expect to observe in this patient AT REST compared to 3 months ago? Pulse pressure Cardiac output A. increased no change B. increased increased C. decreased increased D. decreased no change E. increased decreased
The central sulcus separates which lobes of the cerebrum?
A) temporal from parietal B) parietal from occipital C) frontal from parietal D) frontal from temporal
Which of the following has an antrum?
a. oral cavity b. stomach c. tertiary follicle d. both b and c
If the cusps of an atrioventricular valve are damaged or too short to meet at the center of the valve or do not close completely during the normal point in the pumping cycle, blood may flow backwards. This is called ________.
Fill in the blank(s) with the appropriate word(s).