A bruise appears greenish in the skin because:
A) bilirubin from hemoglobin recycling has accumulated in the bruise.
B) green-colored hemoglobin leaks from the bloodstream into the bruise.
C) the heme group in hemoglobin has broken down into biliverdin.
D) dead white blood cells accumulate at the site of injury.
Answer: C
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The period of time when Na+ channels are recovering from their inactive state and K+ channels are still open is the ________.
A. repolarization B. relative refractory period C. absolute refractory period D. Both repolarization and relative refractory period are correct.
Ribosomes
What will be an ideal response?
Sensory receptors of the ear are
A) mechanoreceptors. B) Merkel cells. C) chemoreceptors. D) photoreceptors. E) baroreceptors.
How many chambers in amphibian and reptilian hearts
a. one b. two c. three d. four e. five