Which of the following abnormalities could give rise to sensorineural deafness?
a. rupture of the tympanic membrane.
b. disease or injury in the organ of Corti.
c. restriction of ossicular movement because of adhesions between the bones.
d. damage to the occipital lobes of the cortex.
e. presbyopia.
B
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Match these terms with their descriptions.
1. carry primarily efferent signals from the brain 2. projections of white matter that remain in the spinal cord 3. projections of white matter that remain in the spinal cord 4. projections that carry sensory information to the brain 5. myelinated axons with very few cell bodies A. gray matter B. white matter C. ascending tracts D. descending tracts E. propriospinal tracts
Blood returning from the systemic circulation enters the right atrium via two large veins, the __________, one returning blood from above and the other returning blood from below heart level
Fill in the blank(s) with correct word
Air consists of about 78.6% nitrogen, 20.9% oxygen, 0.04% carbon dioxide, and 0.5% water. At sea level, (760 mmHg) what is the PCO2?
A. 3.7 mm Hg B. 159 mm Hg C. 597 mm Hg D. 0.3 mm Hg
Coupled transport that involves the moving of one substance against its concentration gradient by using energy from a second substance moving down its concentration gradient is known as
A. primary active transport. B. receptor-mediated endocytosis. C. bulk transport. D. sympathetic exocytosis. E. secondary active transport.