Besides blood, what other fluid returns to the dural sinuses of the brain? To what vein do the dural sinuses return these fluids?
What will be an ideal response?
Blood from the brain drains into the dural sinuses, which also receive cerebrospinal fluid from the arachnoid granulations. Blood from the dural sinuses drains into the internal jugular veins.
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A hemisection of the spinal cord damaging the spinothalamic tracts would result in this loss:
A. no loss on either side B. loss on the same side C. loss on the opposite side D. loss on both sides
Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________.
A) tonsil B) thymus C) Peyer's patch D) appendix
Regulatory-protein transcription factors bind to ________ and activate ________, which tells the RNA polymerase ________.
Fill in the blank(s) with the appropriate word(s).
What is the reason why we must breathe oxygen?
Oxygen is broken down to yield energy. Oxygen allows us to get more energy (in the form of ATP) out of the food molecules we break down for energy. Oxygen stimulates enzyme activity. Oxygen is the chemical detected by chemoreceptors that keeps us breathing.