The Urinary System

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Human Anatomy
Chapter 26
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1

The ________ urethral sphincter is composed of skeletal muscle and under voluntary control.

external

2

The calyces and renal pelvis are all flared branches off the ________, which is an organ that
transmits urine to the bladder.

ureter

3

The ________, a clinical landmark in the urinary bladder, is bounded by the two ureteric
openings and the internal urethral orifice.

trigone

4

Most water and solutes are resorbed from the convoluted renal tubules into the ________.

peritubular capillaries

5

The U-shaped ________ is located between the proximal and distal convoluted tubules.

nephron loop

6

________ are large cells with complex "footlike" processes that wrap around the glomerular
capillaries.

podocytes

7

The ________ artery is located between the interlobar and cortical radiate arteries.

arcuate

8

Between the fibrous renal capsule and the renal fascia is a cushioning and supportive
________ fat capsule.

perirenal

9

Adjacent collecting ducts join to form larger ________ that drain into the minor calyx.

papillary ducts

10

Blood pressure is regulated by a specialized structure, known as the ________, that contacts
both the afferent arteriole and the terminal end of the nephron loop.

juxtaglomerular apparatus

11

The ________ layer of the ureters propel urine to the bladder by peristalsis.

muscularis

12

Voiding of urine, known as ________, involves sympathetic, parasympathetic, and somatic
fibers.

micturition

13

Five ________ arteries branch from the renal artery and enter the hilus.

segmental

14

________ cells are modified smooth muscle cells of the afferent and efferent arterioles that
secrete the hormone renin.

Granular (or Juxtaglomerular)

15

Glomeruli arise from branches off the ________ arterioles of the cortex.

afferent glomerular