Older people may require lower drug doses than younger people because ________.
A. they have lower rates of renal clearance
B. there is less tissue mass to treat
C. their organs are more sensitive to drugs
D. they do not absorb as much drug from the small intestine
E. a lifetime of mutations results in unpredictable drug reactions
Answer: A
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Actin
a. has ATPase activity. b. is spherical. c. forms a helical chain that forms the main structural component of the thin filaments. d. two of these answers. e. all of these answers.
Arrange the following in correct sequence:(1) Protein moves through ER and then carried in vesicles to Golgi apparatus(2) Vesicle pinches off from the Golgi apparatus and carries product to plasma membrane(3) Golgi apparatus modifies protein and then packages them into vesicles(4) Protein made by ribosomes on rough ER
A. 2, 3, 1, 4 B. 4, 3, 2, 1 C. 4, 1, 3, 2 D. 3, 2, 4, 1 E. 1, 2, 3, 4
Which photoreceptor cells are more numerous?
A. Rods B. Cones
Which of the following is described correctly?
A) Oligodendrocytes provide the myelination in the peripheral nervous system. B) Schwann cells provide the myelination in the central nervous system. C) Schwann cells provide the myelination in the peripheral nervous system. D) Astrocytes provide the myelination in the central nervous system.