The area of the respiratory passageways that begins at the larynx and extends into the alveoli is the
A) lower respiratory tract.
B) upper respiratory tract.
C) conducting portion.
D) respiratory portion.
E) All of the answers are correct.
A) lower respiratory tract.
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Select the statement below that is false
A) Meiosis results in haploid cells while mitosis results in diploid cells. B) A cell undergoing meiosis results in 4 cells while a cell undergoing mitosis results in two cells. C) Meiosis occurs only in stem cells while mitosis can occur in any of the body's cells. D) Meiosis occurs only after the onset of puberty and produces genetically unique cells while mitosis occurs throughout an entire life time and produces genetically identical cells.
The process of ventilation includes both the transport of gases by bulk flow and the diffusion of gases into and out of the blood
Indicate whether the statement is true or false.
In the blood,
A. T3 and T4 are rapidly metabolized. B. most T3 and T4 molecules are found bound to thyroxine-binding globulin (TBG). C. most thyroid hormones are transported in a free form. D. T3 is converted into T4. E. T3 but not T4 is bound to TSH.
Secretion involves v-SNARE markers located on the plasma membrane
Indicate whether the statement is true or false