1. Where are Leydig cells primarily located in the testis?
A.
Between the seminiferous tubules
B.
Inside the lumen of seminiferous tubules
C.
Within the epididymal duct
D.
In the outer layer of the scrotum
Correct Answer:
Between the seminiferous tubules
Explanation:
Leydig cells are interstitial cells located in the spaces between adjacent seminiferous tubules.
2. Leydig cells are also commonly called which type of cells?
A.
Interstitial cells
B.
Germinal cells
C.
Follicular cells
D.
Ciliated cells
Correct Answer:
Interstitial cells
Explanation:
Leydig cells are known as interstitial cells because they occur in the interstitial tissue between seminiferous tubules.
3. What is the usual shape of a Leydig cell?
A.
Polygonal
B.
Highly elongated
C.
Flat and plate-like
D.
Star-shaped with long processes
Correct Answer:
Polygonal
Explanation:
Leydig cells are generally polygonal in shape and occur in groups within the interstitial tissue.
4. What type of nucleus is typically present in a Leydig cell?
A.
Round and centrally located
B.
Long and highly flattened
C.
Multiple and located at the cell edge
D.
Absent in mature cells
Correct Answer:
Round and centrally located
Explanation:
A Leydig cell usually has a round, centrally placed nucleus, which is a characteristic structural feature.
5. The cytoplasm of Leydig cells is commonly described as:
A.
Abundant and granular
B.
Very thin and transparent
C.
Completely vacuole-free
D.
Filled with cilia
Correct Answer:
Abundant and granular
Explanation:
Leydig cells have abundant cytoplasm that may appear granular because of their internal organelles and stored lipid material.
6. Which organelle is especially well developed in Leydig cells?
A.
Smooth endoplasmic reticulum
B.
Cell wall
C.
Chloroplast
D.
Large central vacuole
Correct Answer:
Smooth endoplasmic reticulum
Explanation:
Leydig cells contain well-developed smooth endoplasmic reticulum, a characteristic feature of steroid-producing cells.
7. Leydig cells may contain cytoplasmic droplets of:
A.
Lipid
B.
Cellulose
C.
Starch
D.
Silica
Correct Answer:
Lipid
Explanation:
Lipid droplets can be present in the cytoplasm of Leydig cells and are a recognizable structural feature.
8. Which type of mitochondria is characteristic of Leydig cells?
A.
Mitochondria with tubular cristae
B.
Mitochondria without membranes
C.
Mitochondria with chlorophyll
D.
Mitochondria forming a cell wall
Correct Answer:
Mitochondria with tubular cristae
Explanation:
Leydig cells commonly possess mitochondria with tubular cristae, a feature associated with steroid-producing cells.
9. Leydig cells are usually found in groups within the:
A.
Interstitial connective tissue
B.
Lumen of the seminiferous tubule
C.
Basement membrane of the epididymis
D.
Central cavity of the testis
Correct Answer:
Interstitial connective tissue
Explanation:
Leydig cells occur in clusters within the connective tissue spaces between seminiferous tubules.
10. Which combination best describes the structure of a typical Leydig cell?
A.
Polygonal cell with a round nucleus and abundant cytoplasm
B.
Flat cell with no nucleus and a thin cytoplasm
C.
Ciliated cell with a long, narrow body
D.
Star-shaped cell with a large central vacuole
Correct Answer:
Polygonal cell with a round nucleus and abundant cytoplasm
Explanation:
A typical Leydig cell is polygonal, has a round nucleus, and contains abundant cytoplasm with steroid-producing cell features.
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