Dave has discovered a new lipid-soluble hormone. Which of the following is true regarding this hormone?
A) can be stored in secretory vesicles
B) will be bound to a transport protein in the blood
C) receptor will be located on the plasma membrane
D) will likely act through a second-messenger system
B
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Conduction of a nerve impulse would be the fastest in which of the following?
A. A small fiber with multiple Schwann cells B. A large unmyelinated fiber C. A small diameter myelinated fiber D. A large diameter myelinated fiber E. A small unmyelinated fiber
________ opens up one segment of the DNA helix during replication; ________ adds complementary free nucleotides to the exposed DNA strand
A) DNA polymerase; DNA ligase B) DNA ligase; DNA polymerase C) DNA ligase; DNA helicase D) DNA helicase; DNA polymerase E) DNA helicase; DNA ligase
In which process is energy required but not directly used to produce movements against concentration gradients?
a. osmosis b. primary active transport c. secondary active transport d. simple diffusion e. facilitated diffusion
What marks the boundary between the neck and the thorax?
A) suprasternal notch B) clavicle C) jugular notch D) cricoid cartilage