It's your birthday and you splurge with a big slice of chocolate cake, heavy on the icing. Shortly afterwards, your blood glucose levels rise until an endocrine mechanism (secretion of insulin) counteracts this rise and glucose levels decline. The initial change in blood glucose and insulin response that follows is an example of:
A. physiological constancy.
B. diffusion.
C. homeostasis.
D. positive feedback.
E. lack of homeostasis.
C. homeostasis.
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Which portion of the swallowing process is voluntary?
a. movement of the tongue b. muscle contractions that push the bolus into the pharynx c. depression of the epiglottis d. peristalsis of the esophagus e. stretching of vocal cords
Messenger RNAs containing premature stop codons are destroyed by the mechanism of
A) nonstop decay. B) directed RNase activity. C) nonsense-mediated decay. D) error-mediated repair. E) None of these mechanisms.
How many letters are in the RNA "alphabet" of the genetic code?
a. 4 b. 5 c. 20 d. 64
Please select the key criteria used for categorizing the gram-positive bacilli into groups.
> Capsules > Acid-fastness > Endospores > Motility > Oxygen requirements