Brain blood flow autoregulation ________.
A) is less sensitive to pH than to a decreased oxygen level
B) causes constriction of cerebral blood vessels in response to a drop in systemic blood pressure
C) is abolished when abnormally high CO2 levels persist
D) is controlled by cardiac centers in the pons
C) is abolished when abnormally high CO2 levels persist
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Which of the following pathways for pain is shown in the correct order?
A. Unipolar neuron - spinal cord - medulla oblongata - pons - midbrain - parietal lobe B. Unipolar neuron - spinal cord - medulla oblongata - pons - midbrain - thalamus - parietal lobe C. Unipolar neuron - spinal cord - reticular formation - hypothalamus and limbic system D. All of these answers are correct.
The most superior portion of the lung is called the
A) base. B) apex. C) cardiac notch. D) hilus. E) epipleurium.
Sully is involved in a car accident in which he is rear-ended. The traumatic hyperextension of his head caused
A. a herniated disc. B. scoliosis. C. whiplash. D. a fracture. E. spina bifida.
Why do most cells in the body require oxygen molecules?
a. Glucose cannot be broken down without it. b. It pulls electrons off the electron transport chains in the last part of cellular respiration. c. The electron transport system must pump it through the inner membrane for chemiosmosis. d. ATP synthase uses it to add a phosphate ion to ADP in order to make ATP. e. It pulls electrons off the electron transport chains in the last part of cellular respiration and ATP synthase uses it to add a phosphate ion to ADP in order to make ATP.