Ionic bonds result from:
A) the transfer of electrons from a metal atom to a nonmetal atom.
B) weak attractions between polar molecules.
C) the unequal sharing of electrons between nonmetal atoms.
D) the equal sharing of electrons between nonmetal atoms.
Answer: A
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Epinephrine and norepinephrine are commonly referred to as the fight-or-flight hormones
a. True b. False Indicate whether the statement is true or false
Which of these events must occur first to trigger the skeletal muscle to generate an action potential and contract?
A) Sodium ions rush into the cell. B) Acetylcholine (ACh) binds to receptors on the sarcolemma and allows passage of sodium ions into the cell. C) Potassium ions diffuse out of the muscle cell. D) The sodium-potassium pump restores sodium and potassium back to their initial positions. E) Acetylcholinesterase (AchE) breaks down acetylcholine (ACh).
All of the following are adaptations that allow the heart to use aerobic respiration for energy except which one?
A. Cardiac cells are rich in myoglobin. B. Cardiac cells are rich in glycogen. C. Cardiac cells use a variety of fuels as energy sources. D. Cardiac cells have fewer mitochondria.
After a chlamydia infection, Mrs. Jones developed scar tissue in her uterine tubes. Determine why she is at a higher risk for an ectopic (tubal) pregnancy in her uterine tubes
What will be an ideal response?