Which statement correctly describes what happens during inspiration?
A. The external intercostal and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
B. The external intercostal, pectoralis major, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm relaxes to flatten its dome shape.
C. The external intercostal, pectoralis major, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
D. The external intercostal, pectoralis minor, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
Answer: D
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You (a healthy individual) are swimming underwater when you can no longer resist the urge to breathe. This overwhelming urge is probably due to
A. the increase in pH has made your blood dangerously alkaline. B. the autorhymthic cells in your diaphragm contracting. C. the decrease in O2 available to the cells of the body. D. the increase in plasma H+.
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.
A difficult labor is called __________
Fill in the blank(s) with correct word
The bones that form the instep of the foot are the
A. tarsals. B. metatarsals. C. metacarpals. D. carpals.