Invertebrates possess a
A) Solid ventral nerve cord.
B) Hollow ventral nerve cord.
C) Solid dorsal nerve cord.
D) Hollow dorsal nerve cord.
Answer: A
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The heart valves are innervated by the autonomic nervous system
Indicate whether the statement is true or false
How would decreased diffusion across the arachnoid granulations affect the volume of cerebrospinal fluid in the ventricles?
A) Decreased diffusion across the arachnoid granulations would decrease the volume of CSF in the ventricles because less CSF would reenter the bloodstream. B) Decreased diffusion across the arachnoid granulations would decrease the volume of CSF in the ventricles because more CSF would reenter the bloodstream. C) Decreased diffusion across the arachnoid granulations would increase the volume of CSF in the ventricles because less CSF would reenter the bloodstream. D) Decreased diffusion across the arachnoid granulations would increase the volume of CSF in the ventricles because more CSF would reenter the bloodstream. E) Decreased diffusion across the arachnoid granulations would not change the volume of CSF because the amount of CSF reentering the bloodstream can accommodate for the changes.
Blood is distributed from the surface of a bone to deeper central canals through channels known as
A) perforating canals. B) canaliculi. C) interstitial canals. D) concentric ducts. E) concentric canals.
which best describes the diaphragm?
a) a muscular dome between the thoracic and abdominal cavities b) a sphincter that encircles the eye c) a broad fan-shaped muscle on the side of the head d) a thin superficial muscles of the upper chest and lower face