The trachea and mainstem bronchi:
A) constrict violently when their beta-2 receptors are stimulated excessively.
B) are approximately 10 to 12 cm in length and are joined together at the hilum.
C) do not contain mucous-producing cells in patients without a respiratory disease.
D) are lined with beta-2 receptors that result in bronchodilation when stimulated.
Answer: D) are lined with beta-2 receptors that result in bronchodilation when stimulated.
You might also like to view...
Supraorbital margins with thick, rounded, blunt borders are characteristic of female skulls
Indicate whether this statement is true or false.
Most people retain adequate kidney function in old age. Why?
A. Nephrons use blood more efficiently. B. Glomeruli grow new blood vessels through life. C. A loss of nephrons does not radically impair function because there are so many to begin with. D. Decreased activity in old age leads to a decrease in production of toxins. E. Older people drink less fluid and therefore have less need to produce urine.
Which of these features is found in a lumbar vertebra?
A. Spinous process B. Pedicles C. Vertebral foramen D. Vertebral arch E. All of the choices are correct.
An increase in the size of a muscle fiber is called ________.
Fill in the blank(s) with the appropriate word(s).