12. Which of the following is NOT a characteristic of ep 13. The epithelium char
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12. Which of the following is NOT a characteristic of ep 13. The epithelium characteristic of the urinary tract: 14. Which of the following functions pertain to skin? ithelium? A. Closely packed cells C. Avascular D. Matrix and fibers igh regenerative capacity A. Ciliated columnar B. Mesenchyme C. Transitional A. Sensation B. Protection C. Excretion E. Vitamin D Synthesis F. Physical, chemical barrier G. All but E D. Body temperature regulation H. All are skin functions 15. The plasma membrane is described as: A. Very porous B. Selectively permeable D. Non-selectively permeable C. Selectively porous What was the purpose of the activity where we observed the colored threads? A. Observe how nicely colors and stains appear under the microscope B. Appreciate the depth of specimens, cells & tissues in addition to length and 16. diameter C. Understand that cells and tissues are only 2-dimensional structures D. Estimate the field of view diameter Which of the following is the correct order for the phases of mitosis? A. Interphase-prophase-metaphase-anaphase-telophase B. Prophase-metaphase-anaphase-telophase 17. C. Metaphase-prophase-anaphase-telophase D. Prophase-metaphase-anaphase-telophase-interphase 18. What did the slide of carmine dye crystals in a wet mount demonstrate? A. Active Transport B. Brownian Movement C. Diffusion D. Filtration 19. When observing the letter "e" on a slide you observed that the ink was not equally distributed throughout the paper fibers yet when we read "e" in a newspaper, we see a solid letter. The property of a microscope that accounts for this difference is known as: A. Magnification B. Parfocalism C. Resolution 20. A type of nuclear cell division, also known as a reduction division, responsible for the 21. Replicated chromosomes before anaphase are known as: 22. When does chromosomal (DNA) replication occur in preparation for mitosis? production of gametes is: A. Mitosis A. Duplicates B. Chromosomes C. Chromatids A. Interphase-Gl B. Prophase C. Interphase-S D. Prophase-G2 B. MeiosisC.Interphase D. CentriolesExplanation / Answer
12. Epithelium forms outer layer of many organs. It also lines the body cavities and blood vessels. It is avascular, tighly packed layer made up of cells. It is rapidly growing.
The answer is option (d)
13. The epithelium of urinary tract is also called urothelium. It lines the renal pelvis, urethra, bladder and ureters. It is highly elastic. It is an example of transitional epithelium.
The answer is option (c)
14. Skin is part of integumentary system. It is made up of epidermis.
The answer is (h)
15. Plama membrane separates and protects the cell from the outer environment. It allows molecules to pass in and out of cell. It is selectively permeable.
So the answer is (b)
16. Colored thread exercise is done to see if microscope has enough resolving power to clearly distinguish the threads as separate objects and enough contrast to see the sequence of the threads. It is done to perceive depth of the field.
So the answer is (b)
17. Mitosis is type of cell division. It results in 2 daughter cells having same number and identical chromosomes.
The answer is (b)
18. Brownian movements is random movement of microscopic particle.
The answer is ( b)
19. Sliding letter ‘e’ under microscope activity shows resolution characteristic of microscopic.
The answer is (c)
20. Meiosis is the cell division resulting in formation of gametes. It results in formation of four daughter cells.
The answer is (b)
21. In anaphase, replicated chromosome are known as chromatid
The answer is ( c )
22. The answer is (c) interphase S
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