Babies born prematurely may be at risk for respiratory distress syndrome if their lungs do not yet produce which detergent-like substance that lowers surface tension within the alveoli?
A. oxygen
B. mucus
C. pneumothorax
D. surfactant
Answer: D. surfactant
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Identify the structure at #4
A) intramembranous bone B) spongy bone C) hyaline cartilage D) periosteum E) mesenchyme
What part of the femur articulates with the tibia to form the knee joint?
A) medial epicondyle and lateral epicondyle B) medial condyle and lateral condyle C) greater trochanter and lesser trochanter D) medial malleolus and lateral malleolus
Which structure is often referred to as the "Adam's apple"?
A. Vocal cords B. Thyroid gland C. Epiglottis D. Thyroid cartilage E. Cricoid cartilage
African-American and white women are most similar in the percentage of those who have:
A. masturbated in the last year. B. performed oral sex. C. had two or more sexual partners in the last 12 months. D. had abortions.