Which of the following is NOT a dominant inherited disorder?
A. Achondroplasia
B. Hemophilia
C. Huntington disease
D. Neurofibromatosis
Answer: B
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Which of the following statements regarding the determination of stimulus intensity is true?
A. The only means of detecting intensity changes is through recruitment of greater numbers of sensory units. B. The duration of receptor potentials decreases with increasing stimulus intensity. C. The frequency of action potentials increases with increasing stimulus intensity. D. Stronger intensity stimuli cause rapid adaptation, while weaker stimuli cause slower adaptation. E. The amplitude of action potentials increases with increasing stimulus intensity.
Which of the following is most likely to cause anemia?
A. Any factor that creates a state of hypoxemia B. High altitude C. Renal disease D. Smoking E. Air pollution other than by carbon monoxide
Several blood-borne chemicals affect the lumen size of arterioles. Which are NOT paired correctly?
A) epinephrine — vasoconstriction with alpha receptors B) kinins — vasodilation C) serotonin — vasodilation D) sumatriptan — vasoconstriction E) histamine — vasodilation
Which statement is NOT correct?
A. high oxygenated blood returns from the lungs to the heart through the pulmonary veins B. high oxygenated blood leaves the heart and goes to the body through the aorta C. low oxygenated blood returns from the body to the heart through the vena cavae D. low oxygenated blood leaves the lungs and goes to the heart through the pulmonary arteries