Which step in vitamin D production does the kidney perform?
a)converts cholecalciferol into calcidiol
b)converts calcidiol into calcitriol
c)stores vitamin D
d)none of these
b)converts calcidiol into calcitriol
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In the following enhanced CT of the abdomen, the arrow points to the:
A) lumbar artery. B) right crus of the diaphragm. C) psoas major. D) quadratus lumborum. E) inferior pole of the right kidney.
Positive feedback mechanisms tend to enhance the original stimulus so that the response is accelerated
Indicate whether this statement is true or false?
The heme from the hemoglobin removed from worn-out RBCs is converted into:
A) biliverdin B) transferrin C) amino acids D) erythropoietin
Which of these is NOT a function of lymph nodes?
A) house lymphocytes and macrophages B) filter lymph C) produce red blood cells D) produce lymphocytes