Parathyroid hormone (PTH)
a. stimulates osteoblasts to digest bone.
b. stimulates the absorption of calcium in the kidneys.
c. helps to inactivate vitamin D.
d. is secreted from the thyroid gland.
e. stimulates the release of intrinsic factor from the digestive tract.
B
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In fetal circulation, most blood is shunted away from the lungs. Why is this the case?
A) The lungs have their own circulation. B) The lungs don't need any blood. C) The lungs do not form until right before birth. D) The fetus receives oxygen at the placenta, and the lungs are not yet fully functional.
The human knee-jerk reflex requires an intact _____
A) spinal cord B) corpus callosum C) cerebellum D) medulla
What is the specialized organelle that stores calcium in a skeletal muscle cell called?
Golgi complex Rough ER Sarcomere Sarcoplasmic reticulum
Is it likely that the increase in antibiotic-resistant organisms is related to the increase in hand washing in healthcare facilities?
A. Yes, because the microbiota embedded in the skin oils of the healthcare workers are being killed off and replaced by resistant organisms. B. No, because the increase in antibiotic-resistant organisms is a result of exposure to antibiotics, not alcohol. C. No, because the handwashing prevents organisms from becoming antibiotic-resistant. D. Yes, because the organisms are developing resistance to the alcohol and therefore antibiotics also.