Organic cofactors are referred to as _________
Fill in the blank with correct word.
coenzymes
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In "wet" macular degeneration, capillaries form below the weakened retina and leak blood and fatty materials, leading to vision loss. One treatment for this condition is injection of a VEGF (vascular endothelial growth factor) inhibitor directly into the affected eye areas. How would this treat the condition?
A. VEGF inhibits capillary growth. Blocking release of VEGF will allow new, stronger capillaries to form in the eye and stop leaks. B. VEGF stimulates growth of capillaries. Blocking VEGF will stop weak, leaky capillaries from growing in the eye. C. VEGF signals for blood vessel breakdown. Blocking VEGF will prevent the capillaries from becoming weak and leaking. D. VEGF stimulates the endothelium of arteries to secrete nitric oxide, which relaxes smooth muscle surrounding the capillary. Blocking VEGF prevents the capillaries from relaxing and allowing blood to leak out.
The field of genetics deals only with disease
Indicate whether the statement is true or false
The paranasal sinuses, together with other structures of the upper respiratory tract,
A) are where a small percentage of gas exchange occurs. B) form part of the respiratory membrane. C) are involved in filtering, warming, and humidifying incoming air. D) provide a large area for gas exchange between air and circulating blood. E) are lined by a delicate simple squamous epithelium.
Action potentials are conducted more rapidly
A) in small-diameter axons than in large-diameter axons. B) in unmyelinated axons than in myelinated axons. C) along axons that have nodes of Ranvier. D) all of the above.