Question 24 (Select all that are correct) Which ones of the following statements are true? Mesenchymal stem cells are a type of pluripotent cells Growing stem cells in vitro (outside of the body) is difficult because they tend to differentiate spontaneously stem cells can be extracted from bone marrow Human mesenchymal Mesenchymal stem cells can differentiate into blood cells The natural skin tissue has a unique single-layer structure

Question 24 (Select all that are correct) Which ones of the following statements are true? Mesenchymal stem cells are a type of pluripotent cells Growing stem cells in vitro (outside of the body) is difficult because they tend to differentiate spontaneously stem cells can be extracted from bone marrow Human mesenchymal Mesenchymal stem cells can differentiate into blood cells The natural skin tissue has a unique single-layer structure

Complete Textbook Of Phlebotomy

5th Edition

ISBN:9781337464314

Author:Hoeltke

Publisher:Hoeltke

Chapter3: Basic Human Anatomy And Physiology

Section: Chapter Questions

Problem 1.1E

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QUESTION 4 The main advantage of an established cell line versus primary cell line prepared directly from tissue is: Othey can divide indefinitely (immortalized) Othey may have different properties than source tissue Othey can display differentiated state of source tissue Ⓒlarge numbers of cell can be produced QUESTION 5 Velocity centrifugation separates cellular components by while equilbrium centrifugation separates them by — O size and shape, density Odensity, size and shape O size, shape Oshape, size
QUESTION 4 What is the proper term for fibroblasts that have been reprogrammed to become pluripotent stem cells? O Embryonic adult stem cells Fibroblast stem cells Induced pluripotent stem cells Totipotent stem cells
QUESTION 40 Which of the following is mismatched? tears - serous secretion from exocrine gland cells that enter a duct hormones - secretions from endocrine gland cells that enter the bloodstream mucus - sticky secretion from exocrine gland cells called Goblet cells O breast milk - secretion from endocrine gland cells in the mammary tissue
QUESTION 12 1. Many features of the skin of vertebrates are formed from which substance? Cartilage Hydroxy apatite Muscle Keratin Collagen
Question 29 If a mutation occurs in an embryonic stem cell that alters cell proliferation there is potential for a tumor to arise in which cell type? Any cell type of the organism Mesoderm cell types such as blood cells Epidermal cell types such as skin fibroblasts Endodermal cell types such as pancreatic cells
Question 2 of 10 Question 2. In the presence of low levels of GTP, microtubules inside a cell will undergo due to
A cell collected from the stratum germinativum layer of the skin during adulthood might best be considered a(n) -- stem cell. Unipotent Totipotent Multipotent Pluripotent
Question 42 Which statement is true about mitosis? Page 1 (1E O It is a form of asexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. O It is a form of asexual reproduction resulting in daughter cells that each have one set of chromosomes identical to the parent cell. O l is a form of sexual reproduction resulting in daughter cells that cach have one set of chromosomes identical to the parent cell. O It is a form of sexual reproduction resulting in daughter cells that each have half the number of chromosomes as the parent cell. « Previous Next Quiz saved at 9:05am Submit O
Question 31 Which of the following statement is NOT true in a child diagnosed with retinoblastoma? O The child can't make a functional Rb protein O The cyclin E/cdk2 is rendered non-functional in the child by the defective Rb protein O There is a mutation in the Rb gene O The E2F transcription factor is always active due to non-functional Rb < Previous Not saved
Question 29 Which of these is incorrect about skin pigmentation? O The melanin produced by melanocytes is stored by keratinocytes Darker people have more melanocytes than very fair people A high hemoglobin level will give a ruddy color to the skin Birth marks like a nevus, are due to concentration of melanocytes O The fat-soluble vitamin in carotenoids gives color to the skin భీద కడంి
Question 3 Cells have evolved methods of repairing UV irradiation damage. All of the following are repair mechanism for UV damage EXCEPT (which is false?) O excision repair O activation of photolyase O light repair O dark repair O increased protein synthesis to replace denatured proteins Question 4
Question 11 Which of the following statements is true regarding pili and flagella assembly? O Pili and flagella are synthesized in a similar fashion; the proteins are produced internally then added to the base of the growing appendage. O Pili and flagella are synthesized in a similar, complex manner, approximately 20 different proteins are made inside the cell then secreted to extend the tip of the appendage. O Pili grow when protein subunits are added to the base, whereas flagellin proteins are added to the tip of the flagella during growth. O Pili grow when protein subunits are added to the tip, whereas flagellin proteins are added to the base of the flagella during growth.