Which process results in increased blood pressure in response to hormone release?

In a normal kidney, which of the following conditions would cause an increase in the glomerular filtration rate (GFR)? 

(a) Constriction of the afferent arteriole

(b) A decrease in the pressure of the glomerulus

(c) An increase in the capsular hydrostatic pressure

(d) A decrease in the concentration of plasma proteins in the blood

(e) A decrease in the net glomerular filtration process

The myogenic mechanism is triggered by changes in the stretch of the afferent arteriole. This is the direct result of:

The sympathetic nervous system releases _____________, which causes constriction of the afferent and efferent arterioles.

Angiotensin-II directly increases glomerular filtration pressure by _____________ the ___________ arteriole.

Fill in the blanks for the following statements:

a. When the GFR decreases, the macula densa releases chemicals to______ the afferent arteriole.

b. The sympathetic nervous system______ the blood vessels supplying the kidney _____ to the glomerular filtration rate.

c. The enzyme _____ is released by JG cells in response to a decrease in the GFR.

d. The enzyme ______ converts angiotensin-I to angiotensin-II.

e. Generally, angiotensin-II______ systemic blood pressure while _____ the GFR.

Describe the mechanisms of extrinsic regulation of GFR, and their physiological role.