Air moves into the lungs because
A) the thorax is muscular.
B) the volume of the lungs decreases with inspiration.
C) the gas pressure in the lungs is less than outside pressure.
D) contraction of the diaphragm decreases the volume of the pleural cavity.
E) All of the answers are correct.
C) the gas pressure in the lungs is less than outside pressure.
You might also like to view...
The number of covalent bonds that can be formed by a given atom depends upon the number of electrons present in the outermost orbit.
Answer the following statement true (T) or false (F)
Sympathetic stimulation of the terminal bronchioles causes
A) secretion of less surfactant. B) an increase in blood supply to these areas. C) bronchodilation. D) bronchoconstriction. E) no changes; there is no parasympathetic innervation of these structures.
Conscious control of micturition inhibits the micturition reflex by using nerve centers in
the A) medulla oblongata. B) pons and hypothalamus. C) spinal cord. D) brainstem and cerebral cortex.
What type of receptors, found in the aorta and common carotids arteries, send information to the cardioregulatory center to control heart rate?
A. Baroreceptors B. Photoreceptors C. Nociceptors D. Proprioceptors