The subarachnoid space is
A) filled with fat.
B) a potential space only.
C) between the arachnoid mater and the periosteum.
D) filled with cerebrospinal fluid.
E) between the arachnoid mater and the underlying dura mater.
D) filled with cerebrospinal fluid.
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The stomach needs the celiac artery blood supply in order to receive blood.
Answer the following statement true (T) or false (F)
Mice that lack orexin have difficulty:
a. breathing at night. b. maintaining wakefulness. c. sleeping. d. waking up.
The principal role of calcium in skeletal muscle contraction is to
a. participate in the propagation of an action potential along the surface of the muscle fiber. b. bind troponin, which in turn permits tropomyosin to uncover the cross-bridge binding site on the thin filament. c. bind tropomyosin, which in turn permits troponin to uncover the cross-bridge binding site on the thin filament. d. activate a calcium-calmodulin-dependent protein kinase, which in turn phosphorylates and activates myosin.
Which of the following best describes the cerebrum?
A) motor command center B) executive suite C) visceral command center D) decussation center