CHAPTER 23 THE URINARY SYSTEM PART
1 SECTIONS 1 to 3 HOMEWORK
ASSIGNMENT 2025 2026 COMPLETE
STUDY GUIDE KEY CONCEPTS and
PRACTICE QUESTIONS
Chapter 23: The Urinary System (Part 1, Sections 1 to 3)
Homework Assignment
1. Which anatomical landmark represents the medial
indentation where blood vessels, nerves, lymphatic
vessels, and the ureter enter or exit the kidney?
A. Renal cortex
B. Renal hilum
C. Renal pelvis
D. Renal capsule
Correct Answer: B
Rationale: The renal hilum is the prominent medial slit or
indentation on the concave surface of the kidney that serves as
the entry and exit portal for the renal artery, renal vein, nerves,
lymphatics, and the expanded origin of the ureter (renal pelvis).
2. Because the kidneys are positioned behind the
parietal peritoneum against the posterior abdominal
wall, their anatomical location is described as:
A. Intrathoracic
B. Intraperitoneal
C. Infrapubical
D. Retroperitoneal
Correct Answer: D
, Rationale: The kidneys, along with the adrenal glands and
ureters, lie posterior to the parietal peritoneum that lines the
abdominal cavity. This specific anatomical placement outside the
peritoneal sac is termed retroperitoneal.
3. Which layer of supportive connective tissue anchors
the kidney directly to the surrounding abdominal wall
and adjacent structures?
A. Renal fascia
B. Perirenal fat capsule
C. Fibrous capsule
D. Renal cortex
Correct Answer: A
Rationale: The renal fascia (Gerota's fascia) is the outermost
layer of dense irregular connective tissue that anchors the kidney
and adrenal gland to the posterior abdominal wall and
surrounding peritoneum. The perirenal fat capsule provides
cushioning, and the fibrous capsule protects against trauma and
infection.
4. What is the functional, microscopic urine-forming
unit of the kidney?
A. Major calyx
B. Nephron
C. Medullary pyramid
D. Renal papilla
Correct Answer: B
Rationale: The nephron is the structural and functional unit of
the kidney responsible for filtering blood, manipulating the
filtrate, and forming urine. Each human kidney contains
approximately 1 million nephrons.
5. The outer, light-colored vascular region of the internal
kidney structure is known as the:
, A. Renal medulla
B. Renal pelvis
C. Renal cortex
D. Renal column
Correct Answer: C
Rationale: Anatomically, the kidney parenchyma is divided into
two distinct zones: the outer, granular, highly vascularized renal
cortex, and the inner, darker renal medulla which contains the
renal pyramids.
6. What structural components of the renal cortex
extend downward between the medullary pyramids to
provide a pathway for blood vessels?
A. Minor calyces
B. Renal columns
C. Nephron loops
D. Collecting ducts
Correct Answer: B
Rationale: Renal columns (columns of Bertin) are inward
extensions of the cortical tissue that separate the triangular
medullary pyramids. They host the interlobar blood vessels
supplying the cortex.
7. Urine traveling down the collecting ducts leaves the
medullary pyramids via their blunt tips, which are
anatomically named:
A. Minor calyces
B. Renal sinuses
C. Renal papillae
D. Renal hilums
Correct Answer: C
Rationale: The apex or blunt point of each medullary pyramid is
called the renal papilla. Collecting ducts empty urine through
openings in the papilla into the cup-like minor calyces.
, 8. Arrange the macrovascular blood flow structures of
the kidney in the correct sequence as blood enters from
the systemic circulation toward the cortex:
A. Renal Artery \(\rightarrow \) Segmental Artery
\(\rightarrow \) Interlobar Artery \(\rightarrow \)
Arcuate Artery \(\rightarrow \) Cortical Radiate Artery
B. Renal Artery \(\rightarrow \) Arcuate Artery \(\rightarrow \)
Interlobar Artery \(\rightarrow \) Cortical Radiate Artery
C. Segmental Artery \(\rightarrow \) Renal Artery \(\rightarrow
\) Cortical Radiate Artery \(\rightarrow \) Arcuate Artery
D. Renal Artery \(\rightarrow \) Cortical Radiate Artery
\(\rightarrow \) Arcuate Artery \(\rightarrow \) Interlobar Artery
Correct Answer: A
Rationale: Oxygenated blood enters via the renal artery,
branches into segmental arteries within the renal sinus, paths
between pyramids as interlobar arteries, arches over the
pyramid bases as arcuate arteries, and ascends into the cortex as
cortical radiate (interlobular) arteries.
9. Which specific vessel branches off the cortical radiate
artery to directly feed blood into a single glomerulus?
A. Efferent arteriole
B. Afferent arteriole
C. Peritubular capillary
D. Vasa recta
Correct Answer: B
Rationale: The afferent arteriole branches off the cortical
radiate artery and conducts blood straight into the capillary bed
of the glomerulus for filtration.
10. Uniquely, the glomerulus is a capillary bed that is
both fed and drained by arterioles. Which vessel drains
blood out of the glomerulus?
1 SECTIONS 1 to 3 HOMEWORK
ASSIGNMENT 2025 2026 COMPLETE
STUDY GUIDE KEY CONCEPTS and
PRACTICE QUESTIONS
Chapter 23: The Urinary System (Part 1, Sections 1 to 3)
Homework Assignment
1. Which anatomical landmark represents the medial
indentation where blood vessels, nerves, lymphatic
vessels, and the ureter enter or exit the kidney?
A. Renal cortex
B. Renal hilum
C. Renal pelvis
D. Renal capsule
Correct Answer: B
Rationale: The renal hilum is the prominent medial slit or
indentation on the concave surface of the kidney that serves as
the entry and exit portal for the renal artery, renal vein, nerves,
lymphatics, and the expanded origin of the ureter (renal pelvis).
2. Because the kidneys are positioned behind the
parietal peritoneum against the posterior abdominal
wall, their anatomical location is described as:
A. Intrathoracic
B. Intraperitoneal
C. Infrapubical
D. Retroperitoneal
Correct Answer: D
, Rationale: The kidneys, along with the adrenal glands and
ureters, lie posterior to the parietal peritoneum that lines the
abdominal cavity. This specific anatomical placement outside the
peritoneal sac is termed retroperitoneal.
3. Which layer of supportive connective tissue anchors
the kidney directly to the surrounding abdominal wall
and adjacent structures?
A. Renal fascia
B. Perirenal fat capsule
C. Fibrous capsule
D. Renal cortex
Correct Answer: A
Rationale: The renal fascia (Gerota's fascia) is the outermost
layer of dense irregular connective tissue that anchors the kidney
and adrenal gland to the posterior abdominal wall and
surrounding peritoneum. The perirenal fat capsule provides
cushioning, and the fibrous capsule protects against trauma and
infection.
4. What is the functional, microscopic urine-forming
unit of the kidney?
A. Major calyx
B. Nephron
C. Medullary pyramid
D. Renal papilla
Correct Answer: B
Rationale: The nephron is the structural and functional unit of
the kidney responsible for filtering blood, manipulating the
filtrate, and forming urine. Each human kidney contains
approximately 1 million nephrons.
5. The outer, light-colored vascular region of the internal
kidney structure is known as the:
, A. Renal medulla
B. Renal pelvis
C. Renal cortex
D. Renal column
Correct Answer: C
Rationale: Anatomically, the kidney parenchyma is divided into
two distinct zones: the outer, granular, highly vascularized renal
cortex, and the inner, darker renal medulla which contains the
renal pyramids.
6. What structural components of the renal cortex
extend downward between the medullary pyramids to
provide a pathway for blood vessels?
A. Minor calyces
B. Renal columns
C. Nephron loops
D. Collecting ducts
Correct Answer: B
Rationale: Renal columns (columns of Bertin) are inward
extensions of the cortical tissue that separate the triangular
medullary pyramids. They host the interlobar blood vessels
supplying the cortex.
7. Urine traveling down the collecting ducts leaves the
medullary pyramids via their blunt tips, which are
anatomically named:
A. Minor calyces
B. Renal sinuses
C. Renal papillae
D. Renal hilums
Correct Answer: C
Rationale: The apex or blunt point of each medullary pyramid is
called the renal papilla. Collecting ducts empty urine through
openings in the papilla into the cup-like minor calyces.
, 8. Arrange the macrovascular blood flow structures of
the kidney in the correct sequence as blood enters from
the systemic circulation toward the cortex:
A. Renal Artery \(\rightarrow \) Segmental Artery
\(\rightarrow \) Interlobar Artery \(\rightarrow \)
Arcuate Artery \(\rightarrow \) Cortical Radiate Artery
B. Renal Artery \(\rightarrow \) Arcuate Artery \(\rightarrow \)
Interlobar Artery \(\rightarrow \) Cortical Radiate Artery
C. Segmental Artery \(\rightarrow \) Renal Artery \(\rightarrow
\) Cortical Radiate Artery \(\rightarrow \) Arcuate Artery
D. Renal Artery \(\rightarrow \) Cortical Radiate Artery
\(\rightarrow \) Arcuate Artery \(\rightarrow \) Interlobar Artery
Correct Answer: A
Rationale: Oxygenated blood enters via the renal artery,
branches into segmental arteries within the renal sinus, paths
between pyramids as interlobar arteries, arches over the
pyramid bases as arcuate arteries, and ascends into the cortex as
cortical radiate (interlobular) arteries.
9. Which specific vessel branches off the cortical radiate
artery to directly feed blood into a single glomerulus?
A. Efferent arteriole
B. Afferent arteriole
C. Peritubular capillary
D. Vasa recta
Correct Answer: B
Rationale: The afferent arteriole branches off the cortical
radiate artery and conducts blood straight into the capillary bed
of the glomerulus for filtration.
10. Uniquely, the glomerulus is a capillary bed that is
both fed and drained by arterioles. Which vessel drains
blood out of the glomerulus?
