Which photoreceptor cells are more numerous?
A. Rods
B. Cones
Answer: A
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Smooth muscle is voluntary muscle.
Answer the following statement true (T) or false (F)
Cancer cells:
A) may exhibit metastasis. B) have a slower mitotic rate than normal body cells. C) are indistinguishable from normal body cells. D) do not spread into other body tissues.
At equilibrium, in an irreversible reaction:
A. almost all of the reactants will have been converted to products. B. there will be an equal number of products and reactants. C. there will be very few molecules of product. D. small amounts of energy will have been released. E. large amounts of energy must have been input to reach that state.
Before the discovery of these glands, thyroid surgery often led to a rapid drop in blood calcium levels, which triggered muscle contractions and cardiac arrhythmias. What glands are these and which hormone is lacking?
A) thyroid glands; calcitonin B) parathyroid glands; calcitonin C) parathyroid glands; parathyroid hormone D) thyroid glands; levothyroxine E) parathyroid glands; levothyroxine