Answer the following statements true (T) or false (F)
1. The directional movement of cells in response to chemicals is called chemotaxis.
2. Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens.
3. Soluble proteins secreted by plasma cells are called antibodies.
4. A given pathogen will provoke either a cell-mediated response or an antibody-mediated response but not both.
5. Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur.
1. TRUE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
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Calcitonin
a. secretion is stimulated by low blood calcium levels b. secretion is stimulated by a hormone from the anterior pituitary gland c. is secreted by the C-cells of the thyroid gland d. is stored in the colloid of the thyroid follicles e. has characteristics a and c
Which of the following is a notable feature of leukemia?
a. crescent-shaped erythrocytes b. absence of certain blood clotting factors c. yellowing of the eyes and skin d. excessive numbers of white blood cells
What type of tissue is simple columnar tissue?
a. epithelial tissue b. connective tissue c. muscle tissue d. nervous tissue
The smaller muscular arteries and arterioles change their diameter in response to local conditions or to ________.
Fill in the blank(s) with the appropriate word(s).