The increased amount of gray matter in the lumbar region of the spinal cord is known as the ________.
Fill in the blank(s) with the appropriate word(s).
lumbosacral enlargement
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What is the average life span of red blood cells?
A. 4 to 5 days B. 10 days C. 20 days D. 120 days E. Several decades
Elastic recoil refers to the tendency of the chest wall to expand
Indicate whether the statement is true or false
The specific combination of alleles that a person inherits for a certain trait is called the
A. genotype. B. genome. C. locus. D. phenotype. E. homologous chromosome.
An EPSP:
A. is a direct result of the opening of ligand-gated channels permeable to both Na+ and K+ ions. B. is a direct result of the opening of voltage-gated channels permeable to both Na+ and K+ ions. C. stabilizes the membrane to remain at its resting potential. D. opens voltage-gated Ca2+ channels in the presynaptic membrane. E. occurs when voltage-gated Cl- channels open in a postsynaptic cell membrane.