The mucosa-lined windpipe that extends from the larynx to the level of the fifth thoracic vertebra is called the ________.
a. nephron
b. cilia
c. trachea
d. renal cortex
e. afferent arteriole
trachea
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Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.
a. true b. false
What type of receptors do norepinephrine and epinephrine bind in the heart?
A. Muscarinic B. ?1-adrenergic C. Nicotinic D. ?-adrenergic
If the axon of a neuron was severed, this would likely hinder its ability to __________.
A. receive signals B. send signals C. remove metabolic wastes D. synthesize proteins
Mr. Schmitzer has pulmonary fibrosis in which the elastic tissue of his lungs is replaced with dense irregular collagenous connective tissue. His condition primarily affects:
A) surfactant production. B) airway resistance. C) alveolar surface tension. D) pulmonary compliance.