Which of the following is (are) true of the spleen?
A) It contains trabecular arteries.
B) It contains areas of red and white pulp.
C) It is the largest lymphoid organ in the body.
D) It performs the same functions for the blood as the lymph nodes do for the lymph.
E) All of the answers are correct.
E) All of the answers are correct.
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The “lock and key” model is use to describe the functioning of:
a. enzymes b. collagen molecules c. keratin molecules d. both A and B above
Hemoglobin
A. transports O2 in the blood. B. gives white blood cells their color. C. is normally found in both the plasma and erythrocytes. D. is only used once then decomposed. E. catalyzes the reaction that forms carbonic acid.
Hematocrit is the percentage of ____ in a blood sample.
Fill in the blank(s) with the appropriate word(s).
What type of epithelial tissue is found lining the trachea?
A. simple cuboidal epithelium B. stratified squamous epithelium C. pseudostratified ciliated columnar epithelium D. simple columnar epithelium E. transitional epithelium