In the lungs, an example of the body's reserve capacity is that
A) pulmonary blood flow is completely under the control of the autonomic nervous system, dilating arteries and arterioles to adjust blood flow.
B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise.
C) some areas of the lung can be closed off during rest and opened again when needed during exercise.
D) All of the statements are true.
E) None of the statements are true.
B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise.
You might also like to view...
The class of large, flightless birds that are raised for their meat and hides is called ________________________________________
Fill in the blank(s) with correct word
Large molecules move across the plasma membrane with the help or assistance of protein carriers. This type of transport is generally called ________.
A. Passive transport B. Mediated transport C. Active transport D. Vesicular transport
The formation of a pocket of the plasma membrane to bring in solid materials is called
A. pinocytosis. B. phagocytosis. C. facilitated diffusion. D. exocytosis.
Polymodal neurons are:
A. afferent neurons. B. interneurons that receive synaptic input from different kinds of sensory units. C. part of specific ascending sensory pathways. D. interneurons that receive synaptic input from only one type of sensory unit. E. efferent neurons.