The trachea and upper bronchial tree are similar in that both are held open by cartilaginous rings.
Answer the following statement true (T) or false (F)
True
The upper bronchial tree and the trachea are both held open by cartilaginous rings.
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We refer to water as a solvent. Why do oil and water not mix then?
a. Oil cannot break the surface tension of water. b. Oil forms hydration shells around the water molecules. c. Water can only dissolve polar molecules and ionic compounds. Oils (lipids) are nonpolar. d. Water can only dissolve nonpolar compounds. Oils (lipids) are polar.
Which of the following represents one of the four major biological macromolecule classes?
a. proteases b. hydrophilic G-proteins c. amorphous solids d. nucleic acids
If our bodies are capable of secondary responses, how do people contract influenza more than once?
a. Memory cells lose their ability to recognize antigens after six months. b. The affinity of antibodies diminishes in the secondary response. c. New varieties of flu virus continuously evolve. d. Our bodies cannot launch a strong enough immune response against the flu virus. e. There are no effective vaccinations for the flu.
Tripling the concentration of enzyme will ______ the Vmax and _____ the KM.
a) triple, not alter b) not alter, triple c) triple, triple d) not change, not alter