Around what age does puberty usually begin?
a. 8-9
b. 11-13
c. 14-15
d. 16-18

Which hormone controls the production of sperm

Does anyone know how to dissect a frog or baby squid?

Which of the following are considered general purposes of performing pulmonary function tests (pfts)? 1. the functional status of the lungs 2. the diffusion characteristics of the alveolar-capillary membrane 3. how much and how fast gas can be moved into and out of the lungs 4. the specific diagnosis of pulmonary disease