Last Minute Concepts to Review

Question 1

renin released from JGA cells is stimulated by

Answer 1

• decreased NaCl delivery to the macula densa
• increased sympathetic efferent activity
• decreased stretch of JG cell from decreased arterial BP

Question 2

role of AGII

Answer 2

• constrict cardiovascular system
• efferent arteriole constriction
• activates Na+/H+ exchanger in the proximal tubule
• increased ADH release

Question 3

JGA formed by

Answer 3

• specialized cells of afferent arteriole and distal tubule

- the smooth muscle cells in the afferent arteriole of the JG apparatus is what releases renin