External respiration involves or requires all of the following except
A) contraction of the diaphragm
B) production of carbon dioxide by tissues.
C) the exchange of gasses between the blood and alveoli.
D) the exchange of gasses between the blood and the cells of the body.
Answer: B) production of carbon dioxide by tissues.
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Filtration requires hydrostatic pressure.
Answer the following statement true (T) or false (F)
While the fingers can exhibit flexion and extension and other angular motions, the thumb has much greater freedom. Why?
What will be an ideal response?
Arielle is an 8-year-old with cystic fibrosis. For 30 minutes each morning and evening
parent holds her body in various positions and massages and kneads the areas over her lungs to dislodge the abundant, sticky mucus, which Arielle spits into a jar. She also takes medication - an enzyme - that thins the mucus. If she didn't take these measures, the mucus in her lungs would most likely increase her risk of A) infection. B) emphysema. C) cancer. D) asthma.
When a muscle contracts, it usually has an opposing muscle that can cause movement in the opposite direction. Such a muscle is called a(an)
A) prime mover B) agonist C) antagonist D) synergist