Under a discounted fee-for-service arrangement, covered services are compensated a discount of the provider's __________ charges

In the open circuit washout method, what gas mixture does the patient breathe for the test?

A. 100% N2 B. room air C. 100% O2 D. He-O2 mixture

The ________ arterioles bring blood to the tightly packed, increasingly narrow capillaries of the glomeruli. 

Fill in the blank(s) with the appropriate word(s).