If your doctor notices a marked decrease in calcium ion levels in your blood, what gland might he suspect is not functioning properly and why?
What will be an ideal response
The parathyroid gland normally responds to low calcium ion levels in the blood and releases PTH, which mobilizes osteoclasts to step up bone destruction, releasing more calcium into the bloodstream. Persistent low blood calcium level therefore implies insufficient PTH, suggesting injury or failure of the parathyroid glands.
You might also like to view...
A neuron is stimulated, which changes membrane potential to the point where voltage-gated Na+ channels open and begin depolarizing the cell. The neuron has reached
A. threshold. B. summation. C. recruitment. D. tetanus.
Which is a sesamoid bone?
A. Femur B. Patella C. First metatarsal D. Clavicle E. Calcaneus
The lungs are located in the
a. thoracic cavity b. mediastinum c. dorsal cavity d. both B and C above
The inheritance of sickle cell anemia involves incomplete dominance. (S determines normal hemoglobin, it is dominant; s is the sickle cell gene). A homozygous recessive person has sickle cell anemia. A heterozygous person has the sickle cell trait. If
parental genotypes are SS and ss, what is the probability of offspring having the sickle cell trait? A) 50%; half are Ss B) 100%; all are Ss C) 25%; one quarter are Ss