This portion of the vestibular apparatus is responsible for dynamic equilibrium
A) semicircular canals
B) otoliths
C) vestibule
D) sensory cells
A
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A neuron synthesizes and secretes substance D, which binds to a receptor on the neuron cell membrane, triggering an
influx of calcium. Substance D therefore is a ligand for a ____.
a. a receptor tyrosine kinase b. a G-protein-coupled receptor c. a hormone receptor d. a ligand-gated ion channel e. guanylyl cyclase
The primary source of new red blood cells in mammals is the
a. liver. b. blood, itself. c. spleen. d. heart. e. bone marrow.
A person is 100 pounds and five feet tall. What
does their BMI say about them?
a. they are overweight b. they are borderline obese c. they are obese d. they are not overweight or obese e. they are extremely obese
In DNA replication, RNA primer is necessary because
A. DNA synthesis starts and stops many times before completed. B. DNA synthesis begins at multiple origins of replication. C. the two strands of a replicating helix must make a full rotation to unwind. D. DNA polymerase is unable to initiate a new polynucleotide chain.