As a skeletal muscle contraction is initiated, acetylcholine binding alters the motor end plate membrane's permeability to
A) acetylcholinesterase.
B) sodium ions.
C) calcium ions.
D) chloride ions.
E) potassium ions.
B) sodium ions.
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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.
Minerals required by the body in moderate amounts include all of the following EXCEPT ________
A) sulfur and potassium B) sodium and chlorine C) calcium and phosphorus D) iron and selenium
Given the following forces acting at a given point across the capillary wall, _______ will occur with a net ______ pressure of ____ mm Hg. - capillary blood pressure = 32 mm Hg - blood osmotic pressure = 23 mm Hg - interstitial fluid hydrostatic pressure = 1 mm Hg - interstitial fluid osmotic pressure = 0 mm Hg
a. Ultrafiltration, outward, 8 b. Ultrafiltration, outward, 10 c. Ultrafiltration, outward, 56 d. Reabsorption, inward, 24 e. Reabsorption, inward, 10
Alkalosis occurs when the pH of the blood is above ____________________
Fill in the blank(s) with correct word