Patients with congenital prolongation of the Q-T interval are at GREATEST risk for:
A) sudden asystole.
B) ventricular arrhythmias.
C) coronary artery disease.
D) acute myocardial infarction.
Answer: B) ventricular arrhythmias.
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Because of the low penetration power of electrons, samples for transmission electron microscopy must be extremely thin. A(n) ________ is able to cut sections as thin as 20 nm.
Fill in the blank(s) with the appropriate word(s).
A group of organisms of the same species that live in a specific location is called a(n) ____
a. community b. population c. species d. genus e. biome
Which of the following neurotransmitters is associated with sleep, mood, attention, and learning?
A) acetylcholine B) epinephrine C) serotonin D) endorphins
Micronutrients
A) benefit organisms if they are present but are not essential.
B) are not naturally occurring and must be synthesized by scientists.
C) are needed in smaller quantities than are macronutrients.
D) include water, carbon, nitrogen, and phosphorus.
E) are smaller molecules than are macronutrients.