The muscular partition that separates the thoracic and abdominopelvic cavities is the thoracic ________.
Fill in the blank(s) with the appropriate word(s).
diaphragm
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The acetabulum is formed by the fusion of three separate bones.
Answer the following statement true (T) or false (F)
Describe the lumbar plexus and sacral plexus
A) The lumbar plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments C1-C5; the sacral plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments C5-T1. B) The lumbar plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments T12-L4; the sacral plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments S4-Co1. C) The lumbar plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments C1-C5; the sacral plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments S4-Co1. D) The lumbar plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments L1-L5; the sacral plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments L4-S5. E) The lumbar plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments T12-L4; the sacral plexus is a nerve network formed by axons from the anterior rami of spinal nerve segments L4-S4.
Which describes the action of a ligand's competitive antagonist?
A. It binds to a different binding site on the protein, altering the protein shape so that a ligand cannot bind. B. When present, it increases the binding of a ligand to its receptor. C. It decreases the amount of ligand required to activate the protein. D. It blocks the binding of the ligand to its binding site and prevents activation of the protein.
Decerebrate posturing is characterized by:
A) flexion of the arms and extension of the legs. B) inward flexion of the wrists and flexed knees. C) extension of the arms and extension of the legs. D) pulling in of the arms toward the core of the body.