Choose the best description of an antigen
A) part or a piece of a disease or pathogen
B) a particle that triggers the adaptive immunity
C) a particle (typically a foreign protein) that triggers inflammation
D) a chemical that enhances or modifies immune response
B
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The condition known as osteopenia
A) affects mostly women. B) causes a gradual reduction in bone mass. C) is caused by too much vitamin D in the diet. D) is rarely seen as people age. E) only affects the femur.
Most people have 24 ribs
Indicate whether the statement is true or false
Which of the following statements regarding endocytosis and exocytosis is correct?
A. Endocytosis is a method by which large molecules may be secreted from a cell. B. Exocytosis is a method by which large molecules may be secreted from a cell. C. Pinocytosis is a form of endocytosis; phagocytosis is a type of exocytosis. D. Pinocytosis is a form of exocytosis; phagocytosis is a type of endocytosis. E. Pinocytosis and phagocytosis are both types of exocytosis.
Which of these muscles is an intrinsic hand muscle that moves the thumb?
a. flexor pollicis brevis b. flexor digiti minimi brevis c. flexor pollicis longus d. extensor pollicis longus e. all of these are correct