The smallest structures that biologists consider to be living are __________.
A. organisms
B. organs
C. macromolecules
D. cells
E. organelles
D. cells
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In the normal hearing pathway, sound waves have to pass from air to liquid as sound is transmitted from the external ear to the inner ear. This occurs as a result of
a. the increase in pressure on the oval window relative to the pressure on the tympanic membrane. b. the increase in force applied to the oval window which is accomplished by the lever action of the inner ear ossicles. c. the difference in surface areas of the tympanic membrane and the membrane of the oval window . d. two of these. e. all of these.
A certain acne medication works by significantly slowing down production of sebum. The structures targeted by this medication are the ________ glands.
Fill in the blank(s) with the appropriate word(s).
The linea alba is
A) a muscle beneath the skull. B) a band of tough connective tissue to which abdominal wall muscles attach. C) a muscle extending from the ischial spine to the coccyx and sacrum. D) a curved, broad muscle on the side of the chest.
The action that the iliopsoas, sartorius, and rectus femoris perform on the femur is ____________________.
Fill in the blank(s) with the appropriate word(s).