What mechanisms and structures maintain the blood supply to the brain under various conditions?
What will be an ideal response?
The brain has a dual blood supply, receiving blood posteriorly from the vertebral arteries and anteriorly from the internal carotids. These two blood supplies mix at the cerebral arterial circle, and then are distributed to a series of other arteries that serve different parts of the brain. The cerebral arterial circle can redistribute blood to all of the arteries if one of the sources is decreased or stopped.
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The ________ is a U-shaped bone that sits above the larynx yet does not articulate with any other bone
A) maxilla B) hyoid bone C) mandible D) zygomatic bone
An alternative term for the visceral layer of the serous pericardium is ____________________.
Fill in the blank(s) with the appropriate word(s).
To synthesize thyroid hormones, iodine is attached to
A. the amino acid tryptophan. B. acetyl coenzyme A. C. cholesterol. D. the amino acid tyrosine. E. the amino acid phenylalanine.
A monosynaptic reflex that monitors and regulates skeletal muscle length is a _____ reflex
A. withdrawal B. flexor C. Golgi tendon D. stretch E. hypoactive