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29 Cards in this Set
- Front
- Back
T/F differences in skin pigmentation are due to varying numbers of melanocytes within each individual |
false. all people have roughly the same number of melanocytes; therfore, differences in skin pigmentation are due to the amount of melanin the melanocytes produce |
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eccrine |
exercise sweat glands |
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apocrine |
body odor sweat glands |
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thick skin: |
found on palms of hand, soles of feet. do not contain hair follicles, contain all five epidermal strata |
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thin skin: |
contains sebaceous lgands, does not include the stratum lucidum, contains hair follicles, found over most of the body |
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the degree of skin pigmentation of a person is related to |
the amount of melanin production by a person's melanocytes |
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the surface of red blood cells and a person with type B blood has |
B antigens |
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the plasma of a person with type A blood has |
anti-B antibodies |
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the surface of red blood cells in a person with type O blood has |
neither A antigens nor B antigens |
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if the blood from individual with type AB blood is mixed with anti-A serum and anti-B serum |
the anti-A serum and the anti-B serum will show agglutination |
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if a blood sample showed agglutination with anti-B solution and no agglutination with anti-A solution, the blood type would be |
B |
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T/F antigens must be processed before they are recognized by a T cell receptor |
tru |
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during antigen processing in a cell |
the antigen will be combined with either a class I MHC or Class II MHC |
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which type of surface marker is present on every nucleated cell in your body and displays fragments fo proteins from within the cell |
MHC I |
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which of the following cells work together to stimulate the production of antibodies |
antigen presenting cell, T helper cell, and B cell |
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where does an antigen presenting cell, such as a macrophage, present the antigen to a T helper cell |
on its surface on a class II MHC |
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a t helper cell becomes activated by a |
antigen presenting cell |
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a T helper cell must become activated before it can stimulate a B cell to produce antibody T/F |
true |
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T/F in antigen presenting cells, fragments from bacteria and viruses are presented attached to MHCII histocompatability complex |
true |
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which cell produces antibodies |
the stimulated b cell, which turns into a plasma cell |
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cytotoxic t cells (CD8+) recognize |
antigens and class I MHC |
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which lymphatic organ involutes and becomes nonfunctional as aging occurs |
thymus |
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which of the following is not a function of the lymph nodes |
production of red blood cells |
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pharyngeal tonsils are |
also called adenoids and are found in the posterior nasopharynx |
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the main function of the spleen is to |
filter blood |
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difference between cellular and humoral immunity |
cellular immunity directly attacks pathogens and infected cells,w hile humoral immunity releases antibodies to do so |
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accessory organs |
liver, pancreas, gallbladder, salivary glands, teeth |
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what type of cell is located in the gastric glands of the fundus and body of the stomach and secretes HCl |
parietal cell |
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what type of cell is locatd in the fundus and body and secretes pepsinogen |
chief cell |