The umbilical artery carries blood that is relatively ________ in oxygen concentration.
Fill in the blank(s) with the appropriate word(s).
low
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What substance can act as a retrograde messenger to suppress release of GABA to contribute to LTP?
A. Acetylcholine B. Carbon monoxide C. Norepinephrine D. Endocannabinoid
Your patient has a buildup of urea in her body. Which of the following statements most likely explains this problem?
A. The kidneys are overly active. B. Protein metabolism is inefficient. C. Bile can no longer be manufactured. D. The liver is no longer producing clotting factors.
Which of the following statements is true of the aortic bodies?
A. They are fetal structures that enable blood to bypass the lungs. B. They are innervated by the glossopharyngeal nerves. C. They are baroreceptors that supply information about blood pressure to the pons. D. They are chemoreceptors that supply information about blood chemistry to the medulla oblongata. E. They communicate with the pons by way of the vagus nerve.
Which secondary brain vesicle forms the portion of the adult brain that includes the epithalamus, thalamus, and hypothalamus?
A. Telencephalon B. Diencephalon C. Myelencephalon D. Metencephalon E. Mesencephalon