What is the depth of field?
A) The thickness of the specimen that is in sharp focus
B) How easily focused the specimen is between two different magnifications
C) The length of the specimen when viewed with the scanning objective lens
D) How wide the view is through the lens
Answer: A
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Which of the following is a principle of the fluid mosaic model of cell membrane structure?
A) Phospholipids form a bilayer that is largely impermeable to water-soluble molecules. B) Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains. C) All proteins associated with the cell membrane are contained in a fluid layer on the outside of the cell. D) The lipid bilayer is a solid at body temperature, thus protecting the cell.
Common symptoms of hypotonicity include dry skin, parched tongue, and sunken eyeballs
Indicate whether the statement is true or false
Because aldosterone encourages the secretion of potassium ions into the urine, conditions in which excess aldosterone is secreted results in
a. hyponatremia b. hypokalemia c. hypotension d. idiopathic atrophy e. none of the above
What is the name of the area within the thoracic cavity where the heart is located?
A) fossa ovalis B) auricle C) mediastinum D) thoracic cavity