Dr. Kallie Mini Q2

60 Questions | Total Attempts: 154

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Dr. Kallie Mini Q2 - Quiz

Questions and Answers
  • 1. 
    Which of the following statements concerning the plasmalemma is CORRECT?
    • A. 

      Integral protein are located only on the cytosolic side of the lipid bilayer

    • B. 

      Phospholipids are identical in composition in both the outer and inner regions of the lipid bilayer

    • C. 

      Sphingomyelin and ethanolamine are evenly distributed throughout the lipid bilayer

    • D. 

      Phospholipids having saturated and unsaturated fatty acids contribute to lipid asymmetry

    • E. 

      Pheripheral proteins are only found on the cytosolic side of the lipid bilayer

  • 2. 
    Which of the following statements relating to receptor sites of the plasmalemma is CORRECT?
    • A. 

      ACTH (adrenocorticotropic hormone) binds to receptor sites on the thyroid gland

    • B. 

      TSH binds to the phospholipids of the lipid bilayer

    • C. 

      The carbohydrate portion of membrane proteins act as receptor sites for ligands or hormones

    • D. 

      TSH (thyroid stimulating hormone) binds to receptor sites on the adrenal gland

    • E. 

      The receptor sites for ligands are located on the cytosolic side of the plasmalemma

  • 3. 
    The primary function of intermediate filaments is to
    • A. 

      Generate movement

    • B. 

      Produce the structural core of microvilli

    • C. 

      Provide mechanical stability

    • D. 

      Produce the axoneme of flagella

    • E. 

      Be involved in the movement of chromosomes

  • 4. 
    Which of the following is found primarily in the lamina densa of the basement membrane?
    • A. 

      Type III collagen and proteoglycans

    • B. 

      Type IV collagen and proteoglycans

    • C. 

      Microfibrils and proteoglycans

    • D. 

      Laminin and Fibronectin

    • E. 

      Reticular fibers and type VII collagen

  • 5. 
    Which of the following statements BEST describes pseudostratified columnar epithelium?
    • A. 

      All cells make contact with the basal lamina

    • B. 

      Nuclei are all located at the basal end of each cell

    • C. 

      Cells are all the same size and columnar in shape

    • D. 

      Columnar cells form the basal layer of cells and the intermediate layers above are composed of polyhedral cells

    • E. 

      Basal infoldings are a prominent feature of this epithelium

  • 6. 
    Which of the following surface specializations is unique to the cells lining the epididymis?
    • A. 

      Flagella

    • B. 

      Cilia

    • C. 

      Stereocilia

    • D. 

      Microvilli and basal infoldings

    • E. 

      Cilia and microvilli

  • 7. 
    On the basal side of the cell, the cystoskeleton of the cell attaches the plasma membrane to the basal lamina via?
    • A. 

      Cytokeratin filaments

    • B. 

      Integrins

    • C. 

      Actin microfilaments

    • D. 

      Cadherins Ca++ dependent proteins

    • E. 

      Proteoglycans

  • 8. 
    Which of the following statements concerning zonula adherens is CORRECT?
    • A. 

      Cadherins Ca++ dependent proteins on the plasma membrane bind to actin microfilaments via vinculin and alpha actinin

    • B. 

      Tonofilaments insert on cytosolic side of the plasma membrane of each cell

    • C. 

      An intermediate dense line of desmoglein is present in the intercellular space

    • D. 

      The intercellular space is 30 nm or greater

    • E. 

      The terminal web is composed only of actin microfilaments

  • 9. 
    Which of the following statements concerning meiosis is CORRECT?
    • A. 

      Separation of chromatids occurs during anaphase I of meiosis I

    • B. 

      Pairing of homologous chromosomes occurs in prophase I of meiosis I

    • C. 

      Non disjunction can only occur in meiosis II

    • D. 

      Crossing over of genetic material occurs in metaphase I of meiosis I

    • E. 

      Pairing of homologous chromosomes occurs in metaphase I of meiosis I

  • 10. 
    Which of the following statements concerning gametogenesis is CORRECT?
    • A. 

      Primary oocytes are arrested in the diplotene stage of prophase II before birth

    • B. 

      Primary follicles are all formed at the time of birth

    • C. 

      Primary spermatocytes are formed before birth

    • D. 

      Follicular cells of the primordial follicles secrete oocyte maturation inhibitor

    • E. 

      Ova are produced at the time of birth

  • 11. 
    During the process of fertilization:
    • A. 

      Acrosin and neuraminidase are released from the cortical granules. These enzymes digest the zona pellucida

    • B. 

      The sperm's plasma membrane fuses with the cells of the corona radiata

    • C. 

      The tail of the sperm drops off as the sperm touches the zona pellucida

    • D. 

      Acrosin and neuraminidase are released from the acrosome. These enzymes digest the zona pellucida

    • E. 

      The cortical granules release enzymes that digest the corona radiata cells

  • 12. 
    Which of the following statements concerning the fertilization process is CORRECT?
    • A. 

      Uncapacitated sperms can penetrate the secondary oocyte

    • B. 

      Enzymes released from the cortical granules cause the oocyte plasma membrane and the zona pellucida to undergo a conformational change

    • C. 

      The zygote that is produced has 1n chromosome number

    • D. 

      Several sperms normally penetrate the secondary oocyte

    • E. 

      Sperms become capacitated in the epididymis

  • 13. 
    During the menstrual cycle
    • A. 

      Follicle stimulating hormone causes ovulation of the secondary oocyte

    • B. 

      A primary oocyte arrested at metaphase I of meiosis I is released at the time of ovulation

    • C. 

      Luteinizing hormone stimulates the granulosa and theca interna layers to form the corpus luteum

    • D. 

      Luteinizing hormone stimulates several primordial follicles to develop

    • E. 

      Follicle stimulating hormone stimulates the corpus luteum to secrete estrogen

  • 14. 
    Which of the following statements concerning the menstrual cycle is CORRECT?
    • A. 

      Human chorionic gonadotropin is secreted from the pituitary gland

    • B. 

      Progesterone secreted from the corpus luteum inhibits the secretion of luteinizing hormone

    • C. 

      Estrogen secreted from the corpus luteum. stimulates ovulation

    • D. 

      Progesterone secreted from the corpus luteum inhibits the secretion of Follicle stimulating hormone

    • E. 

      Human chorionic gonadotropin causes primordial follicles to develop

  • 15. 
    1. Which of the following statements concerning development of the zygote is
                    CORRECT?
    • A. 

      The inner cell mass attaches to the endometrial layer

    • B. 

      The zygote undergoes several meiotic divisions to form the morula

    • C. 

      The blastocyst is composed of a compacted mass of cells

    • D. 

      The morula implants into the endometrial layer of the uterus

    • E. 

      At around 5 6 days, the blastocyst loses its zona pellucida and implants on the endometrium as a result of the trophoblast layer

  • 16. 
    During the 2nd week of development
    • A. 

      The uteroplacental circulation develops within the secondary yolk sac

    • B. 

      The primitive uteroplacental circulation is established as a result of the activity of syncytiotrophoblast cells on maternal sinusoids

    • C. 

      The inner cell mass is composed of trophoblast and hypoblast

    • D. 

      The bilaminar germ disc is composed of epiblast and trophoblast

    • E. 

      The amniotic cavity lies below the hypoblast layer of cells

  • 17. 
    Which of the following statements concerning embryonic development is CORRECT?
    • A. 

      Placenta praevia refers to implantation of the fertilized egg in the fallopian tube

    • B. 

      The trophoblast cells differentiates into syncytiotrophoblast and cytotrophoblast

    • C. 

      The germ disc during the second week of development is composed of epiblast, trophoblast and mesoderm

    • D. 

      The amnion develops around the 13th day of development and is called the secondary yolk sac

    • E. 

      The prochordal plate develops from the epiblast layer which is columnar in shape

  • 18. 
    Which of the following descriptions BEST suit the multilaminar primary follicle?
    • A. 

      An oogonia surrounded by a single layer of columnar cells

    • B. 

      A primary oocyte surrounded by a single layer of cuboidal cells

    • C. 

      A primary oocyte surrounded by many layers of follicular or granulosa cells

    • D. 

      A primary oocyte surrounded by a flattened layer of follicular cells

    • E. 

      A primary oocyte surrounded by a corona radiata layer of cells

  • 19. 
    1. Which of the following statements concerning the mature graafian follicle is
                    CORRECT?
    • A. 

      Follicle stimulating hormone stimulates the granulosa layer to convert androstenedione to estrogen

    • B. 

      Follicle stimulating hormone stimulates the theca interna layer to produce progesterone

    • C. 

      The theca externa layer produces estrogen

    • D. 

      The theca interna layer produces estrogen

    • E. 

      Progesterone stimulates ovulation of the secondary oocyte from the graafian follicle

  • 20. 
    In the absence of fertilization, the
    • A. 

      Corpus luteum degenerates and forms scar tissue called the corpus albicans

    • B. 

      Corpus luteum enlarges to become the corpus luteum of pregnancy

    • C. 

      Human chorionic gonadotropin maintains the viability of the corpus luteum

    • D. 

      Luteinizing hormone continues to stimulate the corpus luteum

    • E. 

      The corpus luteum last for only 2 days after ovulation

  • 21. 
    Which of the following statements concerning the growing (developing) follicles is CORRECT?
    • A. 

      Estrogens from the granulosa cells stimulates proliferation and regeneration of the endometrial lining

    • B. 

      Androstenedione stimulates the endometrial glands to secrete glycolipids

    • C. 

      Follicle stimulating hormone stimulates regeneration and proliferation of the endometrial lining

    • D. 

      The corpus luteum enhances development of the follicles

    • E. 

      Luteinizing hormone causes growing follicles to become atretic

  • 22. 
    Which of the following cell types differentiates into macrophages?
    • A. 

      Neutrophil

    • B. 

      Fibroblast

    • C. 

      Chondroblast cell

    • D. 

      Plasma cell

    • E. 

      Monocyte

  • 23. 
    Which of the following statements concerning loose areolar connective tissue is NOT CORRECT?
    • A. 

      It is composed of a dense arrangement of collagen fibers

    • B. 

      It has lots of ground substance

    • C. 

      It is composed of a great abundance of different cell types

    • D. 

      It is found around glandular units

    • E. 

      It is found surrounding small blood vessels

  • 24. 
    In the biosynthesis of collagen
    • A. 

      The signal peptides of the procollagen molecule is removed in the Golgi complex

    • B. 

      Specific proteases (procollagen peptidase) remove the registration peptides within the cytosol

    • C. 

      Procollagen molecules are soluble due to the registration peptides

    • D. 

      Glycosylation of specific proline occurs before hydroxylation

    • E. 

      Polypeptide alpha chains are formed on SER

  • 25. 
    In certain pathological conditions, the amount of tissue fluid may increase thus causing edema. This condition may be BEST characterized by
    • A. 

      Lack of plasma proteins due to protein deficiency

    • B. 

      Lack of proteoglycans

    • C. 

      Deficiency of glycosaminoglycans

    • D. 

      Over production of collagen fibers

    • E. 

      Constriction of the arterioles

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