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Throughout the late 1960s:

The majority of nephrons are juxtamedullary nephrons.

While scuba diving the gas mixture you inhale results in an oxygen partial pressure of 24 mmHg in the alveolus.  The capillary blood has an oxygen partial pressure of 40mmHg. Which way will the oxygen diffuse? 

What is the function of the respiratory zone of the respiratory tract?

Beavers have relatively little need to conserve water and could therefore be expected to have ______________ than humans do.

Match each structure of the nephron with its function:

As the filtrate moves down the descending limb of the nephron loop, filtrate concentration (osmolarity) becomes  ____________, and upon moving through the ascending limb, filtrate concentration (osmolarity)  becomes ___________________.

Assume that you are a CO2 molecule that diffuses from the blood into an alveolus. Trace your journey through the respiratory tract all the way to the nose as you are being exhaled. I. Pharynx    II. AlveolusIII. Secondary bronchusIV. BronchioleV. TracheaVI.  Primary bronchus

If blood pressure and glomerular filtration rate increase above normal, the myogenic response causes smooth muscle in the afferent arteriole to  _________________. 

The figure above summarizes the hydrostatic and osmotic pressures that favor or oppose glomerular filtration in a healthy person. Imagine a patient is diagnosed with a severe urinary tract infection which has resulted in low systemic BP (hypotension). This has resulted in the hydrostatic pressure of the glomerular capillary (HPc) dropping to 35 mmHg. The osmotic pressure of the glomerular capillary (OPc) is 15 mmHg, and the hydrostatic pressure of the interstitial fluid in the Bowman’s space (HPif) is 20 mmHg. What is the glomerular filtration rate and what effect would it have on filtration?