The epithelium that allows rapid diffusion of oxygen and carbon dioxide through the air sacs of the lungs is.
A) Simple squamous.
B) Simple cuboidal.
C) Simple columnar.
D) Stratified squamous-keratinized.
E) Stratified squamous-nonkeratinized.
Answer: A) Simple squamous.
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Which of the following best describes kidney function in older adults (70 years or older)?
A) Kidney function decreases due to kidney atrophy. B) Only about 3% of older adults have any loss of kidney function. C) Only obese and diabetic older adults have any kidney dysfunction. D) Kidney function remains the same throughout life, regardless of age.
Blood drained from digestive organs empties into the ______ before going through the liver.
A. inferior vena cava B. hepatic vein C. hepatic portal vein D. dural sinus
Although other nutrients can feed into the citric acid cycle, ________ yields energy the quickest
A) glycogen B) glucose C) protein D) fat E) All of the answers yield energy at the same rate.
Urine volume ____ when ADH (antidiuretic hormone) secretion decreases
A. increases B. decreases C. is not affected D. declines E. None of these choices are correct.