The bronchial arteries branch from the ________ to supply the lung airways
A) pulmonary arteries
B) thoracic aorta
C) pulmonary veins
D) pleural arteries
E) brachiocephalic trunk
B
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Which of the following statements concerning red blood cells is false?
A) Red cells are biconcave discs. B) Red cells lack mitochondria. C) Red cells are about 18 µm in diameter. D) Red cells are specialized for carrying oxygen. E) Red cells can form stacks called rouleaux.
The filtration pressure at the glomerulus is equal to
A) glomerular hydrostatic pressure - (capsular hydrostatic pressure + interstitial fluid osmotic pressure). B) capsular hydrostatic pressure + capsular colloid osmotic pressure + glomerular hydrostatic pressure. C) glomerular hydrostatic pressure - (capsular hydrostatic pressure + blood colloid osmotic pressure). D) (capsular hydrostatic pressure + capsular colloid osmotic pressure) - glomerular hydrostatic pressure. E) glomerular hydrostatic pressure - (capsular hydrostatic pressure + capsular colloid osmotic pressure).
A collagenous connective layer called the ________ covers the muscle and separates it from neighboring structures
A) perimysium B) epimysium C) endomysium D) sarcoplasm
Which of the following statements related to the "ON pathway" of the visual system is correct?
A. Bipolar cells fire action potentials only when bright light strikes the photoreceptors linked to them. B. Bipolar cells spontaneously depolarize in the absence of input from photoreceptor cells. C. Bipolar cells hyperpolarize in the absence of input from photoreceptor cells. D. Glutamate receptors on bipolar cells are excitatory. E. Only cones are associated with bipolar cells of the "ON pathway," rods are not.