Chemoreceptors located in the aorta and carotid sinus are activated under which of the following conditions? hypercapnia O hypoxia acidosis all of the above QUESTION 5 The renal medulla has greater osmolarity that the renal cortex. Which of the following solutes contribute to this? sodium chloride O urea o all of the above QUESTION 6 1.2 po Premature infants are susceptible to respiratory distress syndrome because they are not yet able to produce sufficient amounts of type 1 alveolar cells mesangial cells O fibroblasts O surfactant

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