Which type of lever is demonstrated by using scissors?
A) a first-class lever
B) a second-class lever
C) a third-class lever
D) a fourth-class lever
A) a first-class lever
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A) Peyer's patches B) Lymph nodes C) Thoracic duct D) Lymph E) Spleen 11) Protein-containing fluid within lymphatic vessels. 12) Stores blood platelets. 13) Receives lymph from most of the body. 14) Small organs intimately associated with lymphatic vessels. 15) Largest lymphatic organ. 16) Isolated clusters of lymph follicles found in the wall of the small intestine.
Mast cells in tissues are considered to be a type of
A) monocyte. B) eosinophil. C) basophil. D) neutrophil. E) lymphocyte.
To which of the following would the immune system NOT respond?
a. decreased levels of blood flow at the kidney b. influenza virus c. cancerous cell in the lung d. physical injury (penetration of a foreign object) to the skin e. a parasitic worm
A brainstem nucleus that is strongly implicated in the mechanism for selective attention is the locus coeruleus
Indicate whether the statement is true or false.