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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

eccrine

exercise sweat glands

apocrine

body odor sweat glands

thick skin:

found on palms of hand, soles of feet. do not contain hair follicles, contain all five epidermal strata

thin skin:

contains sebaceous lgands, does not include the stratum lucidum, contains hair follicles, found over most of the body

the degree of skin pigmentation of a person is related to

the amount of melanin production by a person's melanocytes

the surface of red blood cells and a person with type B blood has

B antigens

the plasma of a person with type A blood has

anti-B antibodies

the surface of red blood cells in a person with type O blood has

neither A antigens nor B antigens

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

if a blood sample showed agglutination with anti-B solution and no agglutination with anti-A solution, the blood type would be

B

T/F antigens must be processed before they are recognized by a T cell receptor

tru

during antigen processing in a cell

the antigen will be combined with either a class I MHC or Class II MHC

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

which of the following cells work together to stimulate the production of antibodies

antigen presenting cell, T helper cell, and B cell

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

a t helper cell becomes activated by a

antigen presenting cell

a T helper cell must become activated before it can stimulate a B cell to produce antibody T/F

true

T/F in antigen presenting cells, fragments from bacteria and viruses are presented attached to MHCII histocompatability complex

true

which cell produces antibodies

the stimulated b cell, which turns into a plasma cell

cytotoxic t cells (CD8+) recognize

antigens and class I MHC

which lymphatic organ involutes and becomes nonfunctional as aging occurs

thymus

which of the following is not a function of the lymph nodes

production of red blood cells

pharyngeal tonsils are

also called adenoids and are found in the posterior nasopharynx

the main function of the spleen is to

filter blood

difference between cellular and humoral immunity

cellular immunity directly attacks pathogens and infected cells,w hile humoral immunity releases antibodies to do so

accessory organs

liver, pancreas, gallbladder, salivary glands, teeth

what type of cell is located in the gastric glands of the fundus and body of the stomach and secretes HCl

parietal cell

what type of cell is locatd in the fundus and body and secretes pepsinogen

chief cell