71-80

Front 1

71. A patient's skin became very dry and cracked around the same time the patient caught a cold. How does the patient's skin condition relate to catching a cold? Choose 3 answers
A. Eccrine glands have not been producing enough fluid, preventing defense mechanisms from working properly.
B. Cold viruses cause the body to stop producing sweat and chemical secretions.
C. Lack of chemical secretions from sebaceous glands allows viruses to enter the body.
D. Skin's outer layer is no longer continuous enough to keep virus from entering the body.
E. Dry skin is seen during cold weather when the largest number of contagious viruses is active.
F. Dry, cracked skin lacks enough melanin to fight off the infection.

Back 1

A. Eccrine glands have not been producing enough fluid, preventing defense mechanisms from working properly.
D. Skin's outer layer is no longer continuous enough to keep virus from entering the body.
E. Dry skin is seen during cold weather when the largest number of contagious viruses is active.

Front 2

72. How does red bone marrow produce blood cells that function in the body's immune response? Select one.
A. Neutrophils derived from megakaryocytes induce white blood cell proliferation. B. Erythropoietin production leads to white blood cell proliferation. C. Hemocytoblasts gives rise to white blood cells. D. Thrombopoietin production leads to white blood cell proliferation.

Back 2

C. Hemocytoblasts gives rise to white blood cells.

Front 3

73. How do white blood cells help protect the body against pathogens? Choose 2 answers
A. Neutrophils from lymphoid stem cells inactivate inflammatory chemicals.
B. T lymphocytes fight tumors and viruses and activate B lymphocytes.
C. Basophils are agranulocytes that are avid phagocytes.
D. Platelets derived from monocytes protect the body against acute infections.
E. Lymphocytes play an important role in the production of antibodies.

Back 3

B. T lymphocytes fight tumors and viruses and activate B lymphocytes.
E. Lymphocytes play an important role in the production of antibodies.

Front 4

74. Classify each immune response as either antibody-mediated or cell-mediated. Select your answer from the pull-down list.
a. Activates upon exposure to an infected cell
b. Creates immunity specific to an antigen
c. Activates upon exposure to an extracellular antigen
d. Can be active or passive immunity
e. Is effective against toxins
f. Can have primary and secondary responses
1. Cell-mediated response
2. Antibody-mediated response

Back 4

A = Cell-mediated Response
B= Antibody-mediated Response
C = Cell-mediated Response
D = Cell-mediated Response
E = Cell-mediated Response
F = Antibody-mediated Response

Front 5

75. How do the components of the lymphatic system protect the body from disease? Choose 3 answers
A. Trap and remove bacteria entering the throat
B. Use cilia to propel debris-laden mucus away from organs
C. Force lymph through lymph nodes to be screened by cells of the immune system
D. Store phagocytic cells and lymphocytes
E. Filter lymph in the spleen for bacteria, viruses, and other debris
F. Develop immunocompetent T cells

Back 5

A. Trap and remove bacteria entering the throat
B. Use cilia to propel debris-laden mucus away from organs
F. Develop immunocompetent T cells

Front 6

76. What are the roles of the homeostatic control system? Choose 2 answers
A. Allows for large fluctuations of blood pH
B. Monitors and responds to changes in the environment
C. Relays information to and from the control center
D. Modulates skeletal muscle reflex activity
E. Uses negative feedback to regulate blood clotting

Back 6

B. Monitors and responds to changes in the environment
E. Uses negative feedback to regulate blood clotting

Front 7

77. Which of the following accurately identify how the lymphatic system interacts with other systems of the body? Choose 3 answers
A. The spleen destroys aged red blood cells and removes debris from the blood.
B. Lymph nodes contain lymphocytes that are important modulators of the immune system.
C. Lymphatic vessels pick up plasma fluids that have leaked from the vascular system.
D. Lymphatic vessels trap and remove foreign pathogens entering the throat during respiration.
E. The thymus is responsible for storing iron, which is necessary for the proper function of the circulatory system.
F. Peyer's patches filter lymph that comes from the digestive system.

Back 7

A. The spleen destroys aged red blood cells and removes debris from the blood.
B. Lymph nodes contain lymphocytes that are important modulators of the immune system.
D. Lymphatic vessels trap and remove foreign pathogens entering the throat during respiration.

Front 8

78. Which of the following show the correct sequence of interactions between the nervous system and endocrine systems? Choose 2 answers
A. The parasympathetic nervous system releases hormones to cause increased muscle mass.
B. The sympathetic nervous system releases hormones that increase thirst.
C. The sympathetic nervous system increases epinephrine release during stressful situations.
D. The parasympathetic nervous system causes release of epinephrine to increase skin pigmentation.
E. Stretching of the uterus stimulates release of oxytocin from the pituitary, which causes contractions.

Back 8

A. The parasympathetic nervous system releases hormones to cause increased muscle mass.
E. Stretching of the uterus stimulates release of oxytocin from the pituitary, which causes contractions.

Front 9

79. Why is the blood-brain barrier necessary? Select one.
A. Prevents glucose from entering brain tissue
B. Prevents exposure to systemic chemical changes in the blood
C. Prevents the exchange of respiratory gases
D. Prevents fat-soluble molecules from entering brain tissue

Back 9

B. Prevents exposure to systemic chemical changes in the blood

Front 10

80. A person is resting after eating a big meal. Why is such rest important to the digestive system? Select one.
A. Increased digestion during rest is a result of parasympathetic nervous system activity.
B. Resting stimulates the sympathetic nervous system to dilate blood vessels in the digestive tract.
C. Resting stimulates the parasympathetic nervous system to constrict blood vessels in the digestive tract.
D. Increased digestion during rest is a result of sympathetic nervous system activity.

Back 10

B. Resting stimulates the sympathetic nervous system to dilate blood vessels in the digestive tract.