The following is a list of some of the structures of the respiratory tree: 1. secondary bronchi 2. tertiary bronchi 3. bronchioles 4. primary bronchi The order in which air passes through these structures beginning at the trachea is
A) 4, 1, 2, 3.
B) 3, 2, 1, 4.
C) 2, 3, 1, 4.
D) 4, 1, 3, 2.
E) 1, 2, 3, 4.
A) 4, 1, 2, 3.
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The cells that contract and squeeze sweat glands causing them to discharge their accumulated secretions are called __________ cells
Fill in the blank with correct word.
Megapode birds, such as the brush turkey, bury their eggs in soil as crocodilians do rather than brooding them in a nest like other birds
How could you determine whether this mode of incubation is a retained ancestral trait or a derived condition that happens to have reverted to the crocodilian mode?
Which is not a function of cerebrospinal fluid?
A. CSF provides a liquid cushion to protect the brain from sudden movements. B. CSF transports nutrients and chemicals to the brain. C. CSF helps to reduce the effective weight of the brain. D. CSF helps to promote mitosis within neuronal tissue. E. CSF helps to remove waste products from the brain.
Which of the following is NOT an aging effect of the lymphatic system and immunity?
A. Fluid removal by the lymphatic capillaries is reduced. B. Fewer antibodies are produced. C. Onset of autoimmune diseases is unchanged. D. T cell numbers remain constant but they are less functional.