Physio Exam 3 and answers

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  1. 1.      What are the structures having both desmosomes and gap junctions, that connect adjacent cardiac muscle cells?
    A.     Dense bodies
    B.     M lines
    C.     Septums
    D.     Intercalated discs
    D. Intercalated discs
    (this multiple choice question has been scrambled)
  2. 1.      Where does the heartbeat normally begin in the heart?
    A.     AV node
    B.     Bundle of His
    C.     SA node
    D.     Purkinje Fibers
    C. SA node
    (this multiple choice question has been scrambled)
  3. 1.      What ion dominates the plateau phase of the cardiac muscle cell action potential?
    A.     Sodium
    B.     Calcium
    C.     Chloride
    D.     Potassium
    B. Calcium
    (this multiple choice question has been scrambled)
  4. 1.      What event is occurring during the T wave of the electrocardiogram?
    A.     Atrial depolarization
    B.     Ventricular repolarization
    C.     Atrial repolarization
    D.     Ventricular depolarization
    B. Ventricular repolarization
    (this multiple choice question has been scrambled)
  5. 1.      What pressure must be overcome in order for the left ventricle to empty?
    A.     Pulmonary pressure
    B.     Vena cava pressure
    C.     Aortic pressure
    D.     Capillary pressure
    C. Aortic pressure
    (this multiple choice question has been scrambled)
  6. 1.      As the heart rate increases, what is the lowest heart rate at which there will be a decrease in diastolic filling and cardiac output?
    A.     250 beats/min
    B.     180 beats/min
    C.     220 beats/min
    D.     150 beats/min
    B. 180 beats/min
    (this multiple choice question has been scrambled)
  7. 1.      In which type of heart murmur will the valve leaves not properly mesh?
    A.     Valve prolapse
    B.     Valve insufficiency
    C.     Valve stenosis
    D.     Valve closure
    B. Valve insufficiency
    (this multiple choice question has been scrambled)
  8. 1.      What is the immediate effect on heart rate of cutting the vagus nerve, removing parasympathetic input to the heart?
    A.     Decrease heart rate by 60 beats/min
    B.     No effect on heart rate
    C.     Decrease heart rate by 30 beats/min
    D.     Increase heart rate by 30 beats/min
    D.     Increase heart rate by 30 beats/min
    (this multiple choice question has been scrambled)
  9. 1.      Which of these is the primary determinant of blood viscosity?
    A.     Sympathetic stimulation
    B.     Blood pressure
    C.     Percentage of red blood cells in blood
    D.     Blood vessel radius
    C.     Percentage of red blood cells in blood
    (this multiple choice question has been scrambled)
  10. 1.      For a person with a blood pressure of 120/80, what is the pulse pressure?
    A.     40 mmHg
    B.     200 mmHg
    C.     80 mmHg
    D.     120 mmHg
    A.     40 mmHg
    (this multiple choice question has been scrambled)
  11. 1.      Which of these can help reverse stage I of atherosclerosis?
    A.     High salt diet
    B.     Alcohol
    C.     High blood sugar
    D.     Cholesterol
    B.     Alcohol
    (this multiple choice question has been scrambled)
  12. 1.      What type of blood vessel has the slowest blood flow rate?
    A.     Capillaries
    B.     Veins
    C.     Arterioles
    D.     Arteries
    A.     Capillaries
    (this multiple choice question has been scrambled)
  13. 1.      What are lymph nodes?
    A.     Transfer sites between capillaries and lymph vessels
    B.     Merger sites for larger lymph vessels
    C.     Synaptic sites for lymph neurons
    D.     Entry points for lymph entering arteries
    B.     Merger sites for larger lymph vessels
    (this multiple choice question has been scrambled)
  14. 1.      Which of these would DECREASE the return of venous blood to the heart?
    A.     Normal blood pressure gradient
    B.     Negative pressure in the thorax
    C.     Standing upright
    D.     Contraction of skeletal muscles surrounding veins
    C.     Standing upright
    (this multiple choice question has been scrambled)
  15. 1.      Which type of protein is present in the highest amount in blood plasma?
    A.     Fibrinogen
    B.     Erythropoetin
    C.     Globulins
    D.     Albumin
    D.     Albumin
    (this multiple choice question has been scrambled)
  16. 1.      Which of these is present inside red blood cells?
    A.     Mitochondria
    B.     Golgi complex
    C.     Nucleus
    D.     Spectrin
    D.     Spectrin
    (this multiple choice question has been scrambled)
  17. 1.      How many molecules of oxygen can bind to one hemoglobin molecule?
    A.     6
    B.     2
    C.     4
    D.     8
    C.     4
    (this multiple choice question has been scrambled)
  18. 1.      Having the sickle cell trait provide protection against what disease?
    A.     Tuberculosis
    B.     Malaria
    C.     Filariasis
    D.     Hemophilia
    B.     Malaria
    (this multiple choice question has been scrambled)
  19. 1.      Platelet binding, the intrinsic clotting system, and the plasminogen systems are all initially activated by exposing blood to
    A.     High density lipoprotein
    B.     Endothelium
    C.     Collagen
    D.     Calcium
    C.     Collagen
    (this multiple choice question has been scrambled)
  20. 1.      What kind of white blood cell releases histamine?
    A.     Eosinophil
    B.     Basophil
    C.     Neutrophil
    D.     Monocyte
    B.     Basophil
    (this multiple choice question has been scrambled)
  21. 1.      Which of these is the major killer of bacteria in the body?
    A.     Diapedesis
    B.     Interferon
    C.     Chemotaxins
    D.     Complement system
    D.     Complement system
    (this multiple choice question has been scrambled)
  22. 1.      What cells present antigens to B and T lymphocytes?
    A.     Lymph cells
    B.     Macrophages
    C.     Red blood cells
    D.     Microphages
    B.     Macrophages
    (this multiple choice question has been scrambled)
  23. 1.      What do plasma cells make and release?a.     Interleukins
    b.     Cytokines
    c.     Antibodies
    d.     Antigens
    c.     Antibodies
  24. 1.      Which of these is NOT a major function of antibody defense
    A.     Activation of the complement system
    B.     Activation of natural killer cells
    C.     Neutralization by binding
    D.     Activation of macrophages
    C.     Neutralization by binding
    (this multiple choice question has been scrambled)
  25. 1.      Who is given rhogam to prevent future medical problems?
    A.     Children
    B.     Cancer survivors
    C.     Anemia patients
    D.     New mothers
    D.     New mothers
    (this multiple choice question has been scrambled)
  26. 1.      Which cell type is a T lymphocyte (T cell) most likely to attack?
    A.     Fungus
    B.     Bacteria
    C.     Virus-infected cell
    D.     Parasite
    C.     Virus-infected cell
    (this multiple choice question has been scrambled)
  27. 1.      What cells are attacked by the AIDS virus?
    A.     Cytotoxic T cells
    B.     B cells
    C.     Helper T cells
    D.     Complement cells
    C.     Helper T cells
    (this multiple choice question has been scrambled)
  28. 1.      What is the major and potentially fatal site of SRS-A activity?
    A.     Bronchioles
    B.     The heart
    C.     The brain
    D.     The diaphragm
    A.     Bronchioles
    (this multiple choice question has been scrambled)
  29. 1.      Which of these is a major component of the epidermis?
    A.     Blood vessels
    B.     Keratin fibers
    C.     Touch receptors
    D.     Sweat glands
    B.     Keratin fibers
    (this multiple choice question has been scrambled)
  30. 1.      Which of these structures is the site of oxygen exchange in the lungs?
    A.     Alveoli
    B.     Bronchioles
    C.     Trachea
    D.     Bronchi
    A.     Alveoli
    (this multiple choice question has been scrambled)
  31. 1.      What is the intrapleural pressure compared with atmospheric pressure?
    A.     The same as atmospheric pressure
    B.     4 mmHg less than atmospheric
    C.     8 mmHg less than atmospheric
    D.     12 mmHg less than atmospheric
    B.     4 mmHg less than atmospheric
    (this multiple choice question has been scrambled)
  32. 1.      Contraction of which muscle provides extra expiration from the lungs?
    A.     Internal intercostal muscles
    B.     External intercostal muscle
    C.     Trachealis muscle
    D.     Diaphragm
    A.     Internal intercostal muscles
    (this multiple choice question has been scrambled)
  33. 1.      Surfactant reduces the surface tension in the lungs by breaking the bonds between
    A.     Water molecules in alveoli
    B.     Actin and myosin in bronchioles
    C.     Lung cells and capillaries
    D.     Adjacent cilia in airways
    A.     Water molecules in alveoli
    (this multiple choice question has been scrambled)
  34. 1.      If blood in capillaries arriving at the lungs has an oxygen partial pressure (PO2) of 70 mmHg, and the lungs have a PO2 of 100, what will be the PO2 of the blood leaving the capillaries?
    A.     170
    B.     30
    C.     100
    D.     70
    C.     100
    (this multiple choice question has been scrambled)
  35. 1.      Carbon monoxide shifts the oxygen-hemoglobin binding curve
    A.     To the right
    B.     Up
    C.     To the left
    D.     Down
    C.     To the left
    (this multiple choice question has been scrambled)
  36. 1.      What does the carbonic anhydrase reaction combine carbon dioxide with?
    A.     Oxygen
    B.     Water
    C.     Lactate
    D.     Mucus
    B.     Water
    (this multiple choice question has been scrambled)
  37. 1.      Which breathing center in the brain switches off inspiration?
    A.     Apneustic center
    B.     Ventral respiratory group
    C.     Pneumotaxic center
    D.     Dorsal respiratory group
    C.     Pneumotaxic center
    (this multiple choice question has been scrambled)
  38. 1.      Where are the peripheral oxygen receptors located?
    A.     Carotid bodies
    B.     Brainstem
    C.     Kidney
    D.     Vena cava
    A.     Carotid bodies
    (this multiple choice question has been scrambled)
  39. 1.      In which position should a baby sleep in to reduce the possibility of sudden infant death syndrome?
    A.     With its feet higher than its head
    B.     On its stomach
    C.     On its back
    D.     On its side
    C.     On its back
    (this multiple choice question has been scrambled)
  40. 1.      What lung disease is associated with reduced α-antitrypsin?
    A.     Cystic fibrosis
    B.     Emphysema
    C.     Asthma
    D.     Pneumonia
    B.     Emphysema
    (this multiple choice question has been scrambled)
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249107
Card Set
Physio Exam 3 and answers
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MSU Physio
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