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According to the textbook, flexibility starts to decline around  ____ years of age in males.

Which of the following would normally be found in sinusoids?

Cholecystokinin (CCK) is a ______ hormone that binds to ______ cells in the _________ to cause the release of digestive enzymes.

In the diaphragm, the neurotransmitter released from the axon terminals of the phrenic nerve binds to _____ receptors at the neuromuscular junction.

Microvilli are:

(8 points) Following hypovolemic shock, [a] cells on the afferent arteriole sense a reduction in pressure and release the enzyme [b]. This molecule cleaves a short peptide out of the inactive [c] to make the active [d], which is then converted to [e] by an enzyme in the lungs called [f]. The final molecule will [g] blood pressure by causing the contraction of arterial [h] muscle. 

GLUT2 is a high capacity facilitated glucose transporter found in the plasma membranes of hepatocytes. It is also found in:

Our mouth “waters” when the ___________ branch of the autonomic nervous system stimulates __________ cells to transport ________ across the glandular epithelium.

Where in the accompanying figure showing a portion of a kidney, would you expect to find the distal convoluted tubules?

The Pco2 in the alveolar space is normally about 40 mmHg. After breathing in and out rapidly (hyperventilating) alveolar Pco2 levels may fall dramatically causing arterial Pco2 to _____ and _____ the urge to breathe.