Physiology V01 - Introduction to Human Physiology » Fall 2021 » Lecture Quiz 10

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Question #1
The acidity of the secretions of the skin, stomach, urine and vagina help to kill pathogens.
A.   FALSE
B.   TRUE
Question #2
Which of the following results when the complement system is activated by the binding of antibodies to an antigen?
A.   enhancement of phagocytosis of pathogens (opsinization)
B.   formation of membrane attack complexes
C.   all the above
D.   attraction of neutrophils and macrophages (chemotaxis)
E.   enhancement of the inflammatory response by mast cells
Question #3
MHC II receptors are found on all nucleated cells.
A.   FALSE
B.   TRUE
Question #4
Which step of T cell dependent humoral immunity is not correct?
A.   cytokines stimulate the B cell to produce plasma and memory cells
B.   activated CD4 cell then attaches to the MHC II receptor/antigen complex of a B cell and releases cytokines (IL-2)
C.   a helper T (CD4) cell, whose T cell receptor matches the antigen attaches, and is activated
D.   plasma cells secrete antibodies against the antigen
E.   antigen is processed by an antigen presenting cell (APC) and attaches antigen fragment to its’ MHC I receptor
Question #5
IgE antibodies are surface antigen receptors on B cells.
A.   FALSE
B.   TRUE
Question #6
Which of the following steps of inspiration is incorrect?
A.   increase in the size of the thoracic cavity → increase in its volume → decrease in the intrathoracic pressure
B.   volume of lungs increases
C.   intercostal muscles contract moving the ribs up and out → increases the width and depth of the thoracic cavity
D.   ↑ volume of lungs → ↑ intrapulmonary pressure
E.   diaphragm contracts increasing the length of the thoracic cavity
Question #7
Reduced (↓) alveolar ventilation leads to decreased (↓) PO2 in blood which causes dilation of the pulmonary arterioles serving these alveoli.
A.   TRUE
B.   FALSE
Question #8
The saturation of hemoglobin is directly proportional to which of the following?
A.   pO2 and pH
B.   temperature and surfactant
C.   2,3-DPG concentration and pH
D.   temperature and pH
Question #9
What type of cells produce surfactant?
A.   alveolar type II
B.   alveolar type I
C.   squamous cells
D.   dust cells
E.   macrophages
Question #10
Most of the carbon dioxide in the blood is dissolved in the blood plasma.
A.   TRUE
B.   FALSE
Question #11
Which step of cytotoxic (CD8) T cell activation is not correct?
A.   the receptor of an inactive CD8 cell attaches to a specific antigen on the MHC I receptor of an antigen-presenting cell (APC)
B.   CD8 cells divide
C.   it is then costimulated by IL-2 from helper T cells
D.   activated CD8 cells are produced
E.   memory CD8 cells are produced
Question #12
When there is a increase in PCO2 → ↑ H+ → ↑ chemoreceptors in medulla and the carotid and aortic bodies → ↑ inspiratory center.
A.   FALSE
B.   TRUE

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