Which of the following statements about bronchioles is true?
A) Sympathetic action causes bronchodilation.
B) Walls contain hyaline cartilage.
C) Extreme bronchodilation occurs in asthma.
D) The muscular walls are composed of a mixture of skeletal and smooth muscle.
E) Segmental bronchi are braches of terminal bronchioles.
Answer: A
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Fill in the blank(s) with correct word
What happens at the sodium-potassium exchange pump?
A) The sodium-potassium exchange pump maintains the resting membrane potential of the cell by ejecting 3 sodium ions for every 2 potassium ions entering the cell. B) The sodium-potassium exchange pump maintains the resting membrane potential of the cell by ejecting 2 sodium ions for every 3 potassium ions entering the cell. C) The sodium-potassium exchange pump maintains the resting membrane potential of the cell by ejecting 3 potassium ions for every 2 sodium ions entering the cell. D) The sodium-potassium exchange pump maintains the resting membrane potential of the cell by ejecting 2 potassium ions for every 3 sodium ions entering the cell. E) The sodium-potassium exchange pump maintains the resting membrane potential of the cell by ejecting 1 sodium ions for every 6 potassium ions entering the cell.
An example of a synchondrosis is the articulation of the
A) ribs with the sternum. B) radius and the ulna. C) femur with the acetabulum. D) atlas and the axis. E) navicular bone with the cuniform bones.
Which of the following means to kill or destroy??
A) ?Peri B) ?-cidal C) ?Ser D) ?-ac