An emergency medical technician is examining a trauma victim by shining a pen light into her patient's eye. She records the reactivity of the patents pupils as they constrict when stimulated by the light. This test supports which of the following?
A) The patient has suffered brain damage.
B) The patient has function of the trochlear nerve (IV).
C) The patient has lost function of the optic nerve (II).
D) The patient has function of the oculomotor nerve (III).
D
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The major determinant of the resting potential of all cells is
A) K+ concentration inside cells. B) Ca2+ concentration in the blood and interstitial fluid. C) Na+ concentration in the blood and interstitial fluid. D) K+ gradient between the blood and interstitial fluid. E) Na+ concentration inside cells.
Which type of chemical bond holds water molecules together by forming a bridge between the negative oxygen atom of one water molecule and the positive hydrogen atoms of another water molecule?
a. isotopic b. hydrogen c. ionic d. covalent
Agranulocytes have a common stem cell called the ________.
A. lymphoid stem cell B. erythroblasts C. hemocytes D. myeloid stem cell
What is the effect of glucagon?
A. It lowers levels of blood glucose. B. It increases blood glucose levels. C. It inhibits gallbladder contraction. D. It stimulates production of red blood cells. E. It raises blood pressure.