33) The primary function of lymphatic vessels involves



33) The primary function of lymphatic vessels involves ____.

a. collecting excess tissue fluid b. delivering glucose to tissue cells c. collecting CO2 in the tissues

34) Lymph flows from lymphatic vessels directly into ___.

a. aorta b. vena cava c. subclavian vein d. the heart

35) The driving force for the lymph flow comes from ___.

a. gravity b. contraction of the heart c. rhythmic contraction of lymphatic vessels

36) Lacteal is involved in absorbing ____ in the intestine.

a. glucose b. proteins c. lipids d. vitamins

37) Lymphatic capillaries are ___ blood capillaries.

a. more permeable than b. less permeable than c. as permeable as

38) Lymphoid tissue/organs are involved in all of the followings except ___.

a. detecting/destroying foreign microorganisms b. detecting/destroying cancerous cells c. detecting/destroying aged RBCs d. maintaining normal blood pressure

39) Thymus is ____ important in adults than young kids.

a. more b. less c. equally

40) The cardinal signs of inflammation include all of the following except ___.

a. swelling b. yellow c. pain d. heat

41) Which cells do not secret inflammatory chemicals?

a. normal hepatocytes (liver cells) b. damaged tissue cells c. platelets d. leukocytes

42) Pyrogen ___.

a. induces fever b. is secreted by RBCs c. stimulates pituitary to secret growth hormone

43) Gas exchange between the air and the blood occurs in ____.

a. trachea b. bronchi c. alveoli

44) Pulmonary ventilation refers to ___.

a. gas exchange between the air and the blood b. air flow in and out of the lungs

c. oxygen transport by the blood d. gas exchange between the blood and tissue cells

45) The driving force for inspiration originates from the contraction of ___.

a. the lungs b. the diaphragm c. abdominal muscles d. bronchi

46) indicate the earliest event during inspiration?

a. expansion of the lungs b. air flow into the lungs c. pressure increase in the lungs

47) Provided the barometric pressure is 760 mmHg, a pulmonary pressure of 763 mmHg could likely be measured ___.

a. during inspiration b. during expiration

48) If pleural cavity is leaky to the external environment, the related lungs would ___ to expand along with the thoracic cage during inspiration.

a. be able b. not be able

49) Alveolar surface tension is a resistance against ____.

a. inspiration only b. expiration only c. both inspiration and expiration

50) Airway resistance is against ___.

a. inspiration only b. expiration only c. both inspiration and expiration

51) The basic respiratory rhythm originates from ___.

a. the lungs b. the medulla oblongata c. the hypothalamus d. the spinal cord

52) If the pons were damaged, respiration would most likely ___.

a. stop b. become less smooth at the transition between inspiration and expiration c. not be changed much

53) If motor cortex is damaged, ___ will be lost.

a. voluntary control of respiration b. respiration c. nothing about respiration

54) A transient decrease in pH of blood and cerebrospinal fluid would most likely___ respiration.

a. stimulate b. inhibit c. not affect

55) If the total pressure of the air in the lungs is 760 mmHg and 10% of the air is oxygen, the partial pressure of oxygen there is ___.

a. 104 mmHg b. 40 mmHg c. 76 mmHg d. 46 mmHg

56) In case of pneumonia, the respiration membrane becomes___.

a. thinner b. thicker c. larger d. smaller

57) The ventilation-perfusion ratio is ___.

a. autoregulated via pulmonary vasoconstriction/dilation b. not autoregulated

58) ___ oxygen in the blood is normally carried by RBCs.

a. ~10% b. ~50% c. ~99% d. ~80%

59) Oxygen binds to hemoglobin less tightly if the surrounding ___.

a. Pco2 decreases b. Po2 decreases c. pH increases

60) How much oxygen is normally carried in 100 ml of arterial blood?

a. 10 ml b. 20 ml c. 40 ml d. 80 ml

KEY

33a 34c 35c 36c 37a 38d 39b 40b

41a 42a 43c 44b 45b 46a 47b 48b 49a 50c

51b 52b 53a 54a 55c 56b 57a 58c 59b 60b

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