At what age is the male respiratory system fully mature?
A. 2 months
B. 14 years
C. 17 years
D. 20 years
E. 25 years
Answer: E
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Which of the following is a hormone produced by cells in the duodenum wall?
a. Gastrin b. Secretin c. Glucagon d. Gastric-inhibitory peptide e. CCK
Now that he is a college student, Myungsoo's diet doesn't contain much calcium. How does his body maintain healthy blood calcium levels?
a. His osteoblasts are breaking down his bones. b. His kidneys are secreting more calcium into the blood. c. His osteoclasts are breaking down his bones. d. His intestines are resorbing more calcium.
What is the sequence of events in CO2 and O2 transport by erythrocytes in the blood?
1.Red cells pick up O2 in the lungs, drop it off at cells, pick up CO2 and drop it at lungs. 2.Red cells pick up O2 in the cells, drop it off at lungs, pick up CO2 and drop it at cells. 3.Both of the answers are correct. 4.Both of the answers are incorrect.
Arrange the 4 energy sources named in order from the least to the greatest based on the amount of energy stored in the body: Blood glucose
a. A - least b. B - low c. C - great d. D - greatest