While a nurse takes a blood pressure measurement on a patient, what determines how much the pressure cuff should be inflated? How would the nurse determine if he inflated the cuff too much? Too little?
What will be an ideal response?
How much to inflate the cuff is determined from what systolic pressure is expected. Therefore, factors such as age and weight, BP history, and suspected cardiovascular pathology are relevant. The higher the cuff pressure, the greater the chance of causing a patient pain. The nurse would not know for certain he had inflated the cuff too much until he opened the valve to reduce pressure, and determined the systolic blood pressure, at which point he could conclude that he inflated the cuff more than necessary. If he had inflated the cuff insufficiently, he would hear sounds associated with flowing blood as soon as he begins to listen through the stethoscope.
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Which of the following is not true of the pleura?
A. The parietal pleura covers the inner surface of the thoracic wall and the superior surface of the diaphragm. B. The visceral pleura covers the outer surface of each lung. C. Surfactant in the pleural cavity prevents the parietal and visceral pleurae from sticking together. D. The pleural cavity contains serous fluid, which is a lubricant for the movements associated with breathing. E. All of these are true of the pleura.
The level of organization one step more complex than the organ level is the______ level.
Fill in the blank with correct word.
Where are the visual pigments located in the rods and cones?
A) in the inner segment of photoreceptors B) in mitochondria located in the outer segment C) inside membrane discs stacked in the outer segment D) inside a photosensitive nucleus E) sandwiched in the cell membrane of the photoreceptors
What type of cell signaling occurs through the extracellular matrix to nearby target cells?
A. Endocrine signaling B. Paracrine signaling C. Gap junctions D. Synaptic signaling