List, in order, the structures of the respiratory membrane that carbon dioxide must cross to move from the blood into an air sac of the lung
What will be an ideal response?
The carbon dioxide must pass through the pulmonary capillary endothelium, then the fused basement membrane, then the squamous cell of the alveolar wall.
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What happens to most of the secreted T4?
a. it is phagocytized by target tissues. b. it is converted into T3 after being peripherally stripped of one of its I atoms. c. it is the major biologically active form of thyroid hormone at the cellular level. d. it is split to form two DIT molecules, which are excreted in the urine. e. it is permitted to exert its full biological effect as a result of epinephrine's permissive actions.
Describe the pattern of fetal blood flow to and from the placenta
A) Deoxygenated blood flows from the fetus to the placenta through a pair of umbilical arteries, and oxygenated blood returns from the placenta in a single umbilical vein. B) Deoxygenated blood flows from the fetus to the placenta through a pair of umbilical veins, and oxygenated blood returns from the placenta in a single umbilical artery. C) Oxygenated blood flows from the fetus to the placenta through a pair of umbilical arteries, and deoxygenated blood returns from the placenta in a single umbilical vein. D) Oxygenated blood flows from the fetus to the placenta through a pair of umbilical veins, and deoxygenated blood returns from the placenta in a single umbilical artery. E) Deoxygenated blood flows from the fetus to the placenta through a single umbilical vein, and oxygenated blood returns from the placenta through a pair of umbilical arteries.
The endocrine gland that is probably malfunctioning if a person has a high metabolic rate is the parathyroid
Indicate whether the statement is true or false
The membrane lining the abdominal cavity and covering the surfaces of its organs is the ________.
A. pericardium B. pleura C. meninges D. peritoneum