1. The document provides an exercise on the urinary system with multiple choice questions, fill in the blanks, and descriptive questions. 2. The multiple choice questions cover topics like the structural and functional unit of urine secretion, amount of glomerular filtrate produced, epithelium type in the nephron, and location of renin secretion. 3. The fill in the blanks focus on renal anatomy including cortex and medulla divisions, renal lobules, nephron portions, tubule epithelium, juxtaglomerular apparatus, and functions of the distal convoluted tubule.

1. Exercise 13 for histology （Urinary System）
I. Single choice:
1. The structural and functional units for urine secretion in kidney are
A. renal corpuscle B. filtration barrier
C. nephron D. collecting tubule
E. uriniferous tubule
2. In two kidneys of adult, the total glomerular filtrate (primary urine) in per minute
produce about
A. 124ml B. 125ml
C. 124L D. 125L
E. 1500ml
3. The epithelium of thin segment in nephron is
A. simple squamous epithelium
B. simple cuboidal epithelium
C. simple columnar epithelium
D. transitional epithelium
E. stratified squamous epithelium
4. In kidney the renin is secreted by
A. podocyte B. interstitial cell
C. juxtaglomerular cell D. podocyte
E. extraglomerular mesangial cell
II. Fill in the blanks:
1. The parenchyma of kidney may be divided into outer and an inner .
2. The renal medulla is composed of 10-18 pyramid-shaped structures, called ,
and a lot of elongated parallel arrays of tubules penetrate the cortex, called .
3. The cortical labyrinth consists mainly of . A renal lobule consists of
1/2 + single +1/2 .
4. Each nephron includes two portions: (1). , (2). .
5. The collecting tubules are lined with simple or epithelium. The cells
are pale-staining and the cellular border of two adjacent cells are clearly visible. They
are under the control of the .
6. The primary urine is formed in the space of , through reabsorption,
secreting and concentration of renal tubules to form terminal urine which volume is
% of the primary urine.
7. The juxtaglomerular apparatus consist of ,
and .
8. The main function of distal convoluted tubule in kidney is resorb from the
filtrate and transfer into the filtrate from the interstitum.
III. Questions:
1. Describe the fine structure of renal corpuscle in detail.
2. Draw the ultra-structures of the filtration barrier of kidney and describe it in detail.

2. 3. Compare the structures and functions of the proximal convoluted tubule with that
of distal convoluted tubule.
4. Compare the structure and function of the juxtaglomerular complex.
5. Describe the blood supply of the kidney.
6. Which structural characteristics are there in the wall of urinary bladder?