Which hormone controls the concentration of calcium in the bloodstream?
Ans: Parathormone
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The presence of vitamin D is necessary for PTH to exert its effect on promoting intestinal Ca2+ absorption
Indicate whether the statement is true or false
All of the following structures are found in (or surrounding) the nucleus of a cell, except the ________.
A. nucleolus B. centrioles C. nuclear pores D. chromatin E. nuclear envelope
What causes reactive hyperemia to increase tissue perfusion?
A. Neural controls B. Hormonal controls C. Respiratory controls D. Urinary controls E. Local controls
What pressures determine the direction of airflow within the respiratory tract?
A) The intratracheal pressure and intrapulmonary pressure B) The sinus cavity pressures and the intrapulmonary pressure C) The sinus cavity pressures and the atmospheric pressure D) The intrapleural pressure and the intrapulmonary pressure E) The intrapulmonary pressure and the atmospheric pressure