During inspiration, after leaving the larynx, air enters the __________.
A. Nasal Cavity
B. Trachea
C. Pharynx
D. Lungs
Answer is B. Trachea
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Stephanie is in a car accident, flung from her vehicle and landing on her back on pavement. At the scene, an emergency medical technician checks her Babinski reflex, in which the great toe extends upward and the smaller toes fan apart. This reflex
A. is meaningless in assessing an emergency situation. B. is normal in adults. C. may indicate aging of the corticospinal tract. D. may indicate an injury to the corticospinal tract.
A young girl falls while riding her bicycle. Initially she seems fine, but later she complains of severe femoral pain. Where is her pain?
A. Her foot B. Her lower leg C. Her knee D. Her thigh
Choose the incorrect statement regarding calcitonin.
A. It inhibits loss of calcium by bones. B. It lowers blood calcium levels. C. It is made by follicle cells of the thyroid. D. All of the choices are correct.
Which of the following conditions must be met if diffusion across a membrane is to occur?
A) A concentration gradient must be present, and the membrane can't be permeable to the substance being transported. B) A concentration gradient must be present, and the membrane must be permeable to the substance that is to be transported. C) The membrane must be permeable to the substance that is to be transported. D) A concentration gradient must be present.