Inhibition of the flexor muscle during the knee-jerk reflex is an example of:
A. negative feedback.
B. homeostasis.
C. reciprocal inhibition.
D. All of the answer options are correct.
C
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Which of the following is used as an electron carrier by living organisms?
A. NADP+ B. Ubiquinone C. NAD+ D. All of the choices are correct.
Which of the following have chloroplasts (or structures since evolved from chloroplasts) thought to be derived from ancestral green algae?
A) stramenopiles B) apicomplexans C) dinoflagellates D) chlorarachniophytes
IP3 binds to ________ receptors.
A. sensor kinase B. phospholipase type-I C. ligand-gated Ca2+ channel D. enzyme-linked E. G-protein coupled
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A) parathyroid—stimulates the adrenal cortex to secrete glucocorticoids B) pancreas—stimulates growth of the uterine lining C) insulin—regulates blood glucose levels D) prolactin—manages blood potassium levels