Carbon dioxide is transported in the blood by:
conversion to a molecule of carbonic acid
binding to a protein part of the hemoglobin molecule
dissolving in plasma
A, B, and C are correct
none or the choices are correct
A, B, and C are correct:
conversion to a molecule of carbonic acid
binding to a protein part of the hemoglobin molecule
dissolving in plasma
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A person with a damaged visual association area may be
A) unable to see rows of letters. B) declared legally blind. C) unable to recognize letters but able to identify whole words and their meanings. D) able to see letters but unable to associate them into words. E) unable to understand spoken words.
Acetylcholine slows the heart because it
A) opens potassium ion channels in SA node cells. B) opens sodium-calcium ion channels in SA node cells. C) causes the pacemaker potential to depolarize more quickly. D) causes the pacemaker potential to depolarize more slowly. E) opens potassium ion channels in SA node cells and causes the pacemaker potential to depolarize more slowly.
Which of the following is NOT a function of the small intestine?
A. Complete digestion of food B. Mastication of food C. Absorption of nutrients D. Mixing by segmental contractions
Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?
A. astrocyte B. microglial cell C. oligodendrocyte D. ependymal cell E. Schwann cells