13. What is the resolving power of unaided/naked human eye? A. 0,2 micrometer B. 200 nanometer C. 200 milimeter D. 0,2 milimeter E. 2000 micrometer 14. Reticular fibers are stained with __ A. Masson's trichrome B. Silver salts C. Orcein D. Periodic acid-Schiff E. Safranin 15. Excretion of spermium into the seminiferous tubule is a type of A. Autocrine secretion B. Apocrine secretion C. Merocrine secretion D. Holocrine secretion E. Paracrin secretion 16. Which of the following is false about connective tissue? A. Loose connective tissue contains faintly stained ground substance with fine fibers of collagen. B. Reticular connective tissue contains type III collagen. C. Mucoid tissue is an embryonic type of connective tissue. D. Dense irregular connective tissue forms the capsule of testis. E. Wharton's jelly is an exampele of dense regular connective tissue. 17. Which of the following is an anchoring collagen? A. Type II collagen B. Type III collagen C. Type IV collagen D. Type VII collagen E. Type I collagen 18. What is the difference between basal lamina and basement membrane? 20. Why do we call pseudostratified columnar epithelium as pseudostrafied? 19. What are the steps of tissue preparation for light microscopy?

Question

13. What is the resolving power of unaided/naked human eye? A. 0,2 micrometer B. 200 nanometer C. 200 milimeter D. 0,2 milimeter E. 2000 micrometer 14. Reticular fibers are stained with __ A. Masson's trichrome B. Silver salts C. Orcein D. Periodic acid-Schiff E. Safranin 15. Excretion of spermium into the seminiferous tubule is a type of A. Autocrine secretion B. Apocrine secretion C. Merocrine secretion D. Holocrine secretion E. Paracrin secretion 16. Which of the following is false about connective tissue? A. Loose connective tissue contains faintly stained ground substance with fine fibers of collagen. B. Reticular connective tissue contains type III collagen. C. Mucoid tissue is an embryonic type of connective tissue. D. Dense irregular connective tissue forms the capsule of testis. E. Wharton's jelly is an exampele of dense regular connective tissue. 17. Which of the following is an anchoring collagen? A. Type II collagen B. Type III collagen C. Type IV collagen D. Type VII collagen E. Type I collagen 18. What is the difference between basal lamina and basement membrane? 20. Why do we call pseudostratified columnar epithelium as pseudostrafied? 19. What are the steps of tissue preparation for light microscopy?

Answer 1

13. The resolving power of the unaided/naked human eye is approximately 200 nanometers (B).14. Reticular fibers are stained with silver salts (B).15. Excretion of spermium into the seminiferous tubule is a type of merocrine secretion (C).16. The false statement about connective tissue is: Wharton's jelly is an example of dense regular connective tissue (E).17. Type VII collagen is an anchoring collagen (D).18. The difference between basal lamina and basement membrane is that the basal lamina is a layer of extracellular matrix secreted by the epithelial cells, while the basement membrane is a thicker layer that includes the basal lamina and additional components such as reticular fibers and ground substance.19. The steps of tissue preparation for light microscopy are: 1. Fixation: The tissue is preserved by stopping the metabolic activity and maintaining its structure. 2. Dehydration: The tissue is dehydrated by replacing water with organic solvents. 3. Clearing: The tissue is made transparent by removing the organic solvents. 4. Embedding: The tissue is embedded in a solid medium, such as paraffin wax, to provide support during sectioning. 5. Sectioning: Thin slices of tissue are cut using a microtome. 6. Staining: The tissue sections are stained to enhance contrast and highlight specific structures.20. Pseudostratified columnar epithelium is called "pseudostratified" because it appears to have multiple layers of cells, but in reality, all cells are in contact with the basement membrane.

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