Choose the correct description of a typical medium-sized vein.
A) In these vessels, the thin tunica media is surrounded by a thick tunica externa composed of mostly collagen fibers.
B) Ranging from 2 mm to 9 mm in diameter, its thin tunica media consists of one to two layers of smooth muscle cells.
C) It has a diameter of approximately 0.4 cm and has more smooth muscle cells and fewer elastic fibers.
D) It ranges from 2 mm to 9 mm in diameter, and the relatively thick tunica externa has longitudinal bundles of elastic and collagen fibers.
E) It has a diameter up to 2.5 cm, and its tunica media is dominated by elastic fibers rather than smooth muscle cells.
D) It ranges from 2 mm to 9 mm in diameter, and the relatively thick tunica externa has longitudinal bundles of elastic and collagen fibers.
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A. muscarinic; nicotinic B. muscarinic; NMDA C. nicotinic; muscarinic D. NMDA; nicotinic
How much urine is lost through obligatory water loss each day?
A) 2500 ml B) 5000 ml C) 1500 ml D) 500 ml
Red-green color blindness is a recessive, X-linked trait represented as Xc. (Normal color vision is represented as XC.) If a daughter has red-green color blindness, what must the genotypes of her parents be?
What will be an ideal response
For running mammals
a. the increase in metabolism is roughly linear with velocity. b. the increase in metabolism is inversely related to velocity. c. the increase in metabolic rate is independent of velocity.