Which of the following statements is a false or incorrect statement?
A) The lymphoid organs where lymphocytes become immunocompetent are called primary lymph organs. All other lymphoid organs are referred to as secondary lymphoid organs.
B) After becoming immunocompetent, the naive T cells and B cells are exported to the bone marrow where the encounters with antigens occur.
C) It is our genes, not antigens, that determine what specific foreign substances our immune system will be able to recognize and resist.
D) T cells and B cells become activated when they bind with recognized antigens.
B
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The inner cell mass of the blastocyst will
A) form the placenta. B) form the morula. C) form the embryo. D) form blood vessels of the placenta. E) provide nutrients for early growth.
Number 2 indicates a compound _____ gland
A. coiled acinar B. coiled tubular C. tubular D. tubuloacinar E. acinar
____________________ is the bending of light rays as they pass from one medium to another
Fill in the blank(s) with correct word
Watery perspiration is an example of a(n) ________ secretion.
A. merocrine B. serous C. apocrine D. mucous E. holocrine