The hypoxic drive, a backup system to control breathing, is stimulated when:
A. arterial PaO2 levels decrease.
B. arterial PaCO2 levels increase.
C. arterial PaO2 levels increase.
D. arterial PaCO2 levels decrease.
Answer: A. arterial PaO2 levels decrease.
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Which of the following disorders does not result from disjunction?
A. Klinefelter syndrome B. Patau syndrome C. Cri du chat D. Down syndrome E. Turner syndrome
The right atrium receives blood directly from
A. the superior vena cava, inferior vena cava, and pulmonary veins. B. the superior vena cava and inferior vena cava only. C. the superior vena cava, inferior vena cava, and coronary sinus. D. the pulmonary veins.
The elbow joint includes a hinge joint
Indicate whether the statement is true or false
Most hypothalamic and pituitary hormones are:
a. amino acids b. peptides / proteins c. steroids d. eiconsanioids e. catecholamines