1.Dental Hygiene Board Review

86 Questions | Total Attempts: 1778

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Dental Hygiene Quizzes & Trivia

# 1. Board Review for Dental Hygiene. Questions were taken from various sources, including books, online sources, and etc.


Questions and Answers
  • 1. 
    The physiological concept that refers to the maintenance of a constant environment is
    • A. 

      Hemostasis

    • B. 

      Dynamic equilibrium

    • C. 

      Homeostasis

    • D. 

      Interdependence

    • E. 

      Induction

  • 2. 
    The organelles that contain enzymes capable of digesting and destroying cellular debris
    • A. 

      Endoplasmic reticulum

    • B. 

      Golgi apparatus

    • C. 

      Mitochondria

    • D. 

      Lysosomes

    • E. 

      Ribosomes

  • 3. 
    Transport of water across a cell membrane
    • A. 

      Osmosis

    • B. 

      Facilitated diffusion

    • C. 

      Active transport

    • D. 

      Diffusion

  • 4. 
    The direction and rate of diffusion of an ion is influenced by the
    • A. 

      Concentration gradient

    • B. 

      Hydrostatic pressure gradient

    • C. 

      Electrical gradient

    • D. 

      All of the above

  • 5. 
    Active transport differs from facilitated diffusion in that active transport
    • A. 

      Moves a substance against a concentration gradient

    • B. 

      Requires a carrier

    • C. 

      Requires energy from magnesius adenosine triphosphate (Mg ATP)

    • D. 

      Is exemplified by the movement of sodium and potassium across cell membranes

    • E. 

      All of the above

  • 6. 
    All of the following are derived from endoderm except
    • A. 

      Epithelial parts of the respiratory system

    • B. 

      Epithelial parts of the gastrointestinal system

    • C. 

      Epithelium in the mouth

    • D. 

      Epithelium of the pharynx

  • 7. 
    Which of the following is derived from mesoderm?
    • A. 

      Epidermis

    • B. 

      Nervous system

    • C. 

      Adrenal medulla

    • D. 

      Posterior lobe of the pituitary gland

    • E. 

      Connective tissue

  • 8. 
    The developmental period in which teeth and the palate are most susceptible to teratogenic agents is the
    • A. 

      Third through the fifth week

    • B. 

      Fourth through the seventh week

    • C. 

      Fourth through the eighth week

    • D. 

      Eighth through the tenth week

  • 9. 
    Gingiva and buccal mucosa
    • A. 

      Simple squamous epithelium

    • B. 

      Stratified squamous epithelium

    • C. 

      Cuboidal epithelium

    • D. 

      Stratified columnar epithelium

    • E. 

      None of the above

  • 10. 
    What type of connective tissue is present in scar tissue?
    • A. 

      Loose

    • B. 

      Dense fibrous

    • C. 

      Lymphatic

    • D. 

      Reticuloendothelial

    • E. 

      Adipose

  • 11. 
    What kind of cell types line the vascular channels of the body?
    • A. 

      Stratified squamous epithelium

    • B. 

      Endothelium

    • C. 

      Mesothelium

    • D. 

      Transitional epithelium

    • E. 

      Pseudostratified columnar epithelium

  • 12. 
    Pleura is a type of
    • A. 

      Serous membrane

    • B. 

      Mucous membrane

    • C. 

      Visceral membrane

    • D. 

      Parietal membrane

    • E. 

      Synovial membrane

  • 13. 
    In long bones, the process whereby cartilage cells are replaced by bone cells, organic matrix is laid down, and calcium and phosphate are deposited is known as
    • A. 

      Intramembranous ossification

    • B. 

      Endochondral ossification

    • C. 

      Osteoporosis

    • D. 

      Erythropoiesis

    • E. 

      Diaphyseal formation

  • 14. 
    What kind of joint, is described by the following: joint cavity present; bone ends covered by cartilage; may be separated by a disk; freely movable?
    • A. 

      Synarthrotic

    • B. 

      Diarthrotic

    • C. 

      Cartilagenous

    • D. 

      Synphysis

    • E. 

      Synchondroses

  • 15. 
    Which of the following is NOT associated with a skeletal muscle?
    • A. 

      Sarcolemma

    • B. 

      Myofibrils

    • C. 

      Intercalated disk

    • D. 

      Mitochondria

    • E. 

      Actin and myosin

  • 16. 
    Actin and myosin are proteins contained within a
    • A. 

      Myofibril

    • B. 

      Myofilament

    • C. 

      Fiber

    • D. 

      Sarcoplasmic reticulum

  • 17. 
    A single motor neuron and the muscle cells supplied by its axon branches is termed
    • A. 

      An efferent neuron

    • B. 

      A motor unit

    • C. 

      A motor end plate

    • D. 

      A sarcoplasmic reticulum

    • E. 

      An annulospiral ending

  • 18. 
    Which of the following glial cells are responsible for myelin formation in the central nervous system?
    • A. 

      Ependymal cells

    • B. 

      Oligodendrocytes

    • C. 

      Microglia

    • D. 

      Schwann cells

  • 19. 
    Depolarization occurs with
    • A. 

      Transfer of sodium ions to the inside of a neuron

    • B. 

      Transfer of potassium ions to the outside of a neuron

    • C. 

      A reversal of charge across the nerve cell membrane making the outside of the fiber positive with respect to the inside

  • 20. 
    Conduction occurs when a stimulus reduces the membrane potential to a critical level. This level is called
    • A. 

      Summation

    • B. 

      Threshold

    • C. 

      Action potential

    • D. 

      Facilitation

    • E. 

      Refractory period

  • 21. 
    Which tract exerts a facilitative influence on motor neurons in the anterior horn?
    • A. 

      Lateral corticospinal tract

    • B. 

      Ventral corticospinal tract

    • C. 

      Lateral reticulospinal tract

    • D. 

      medial reticulospinal tract

    • E. 

      Ectospinal tract

  • 22. 
    If the ventral root of a spinal nerve were sectioned what would be the result in the regions supplied by the nerve?
    • A. 

      Loss of sensation

    • B. 

      Loss of motor control

    • C. 

      Loss of sensation and movement

    • D. 

      Partial loss of sensation and movement

    • E. 

      Loss of sensation, movement, and control of the degree of constriction of blood vessels

  • 23. 
    Corticospinal tract
    • A. 

      Fibers are located in grey columns of the cord

    • B. 

      Fibers come from neuron cell bodies located in the spinal cord

    • C. 

      Fibers synapse with neurons in the cerebellar cortex

    • D. 

      Fibers are descending fibers from the cells in the primary motor cortex of the frontal lobe

    • E. 

      Nonfunctionng is one cause of loss of sensation

  • 24. 
    The primary motor area of the brain is the
    • A. 

      Precentral gyrus

    • B. 

      Postcentral gyrus

    • C. 

      Temporal lobe

    • D. 

      Occipital lobe

    • E. 

      Hypothalamus

  • 25. 
    Which of the following functions are conducted in the dorsal columns of the spinal cord, that is, in the fasciculus graciles and cuneatus?
    • A. 

      High degree of location

    • B. 

      Vibratory sense

    • C. 

      Fine gradations of pressure

    • D. 

      Kinesthesia

    • E. 

      All of the above