Total peripheral resistance is related to all of the following except the
A) length of a blood vessel.
B) osmolarity of interstitial fluids.
C) turbulence.
D) blood viscosity.
E) blood vessel diameter.
B
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Which of the following statements concerning the countercurrent system is incorrect?
a. the loops of Henle of juxtamedullary nephrons are responsible for establishing a vertical osmotic gradient in the interstitial fluid of the renal medulla by countercurrent multiplication. b. the active NaCl pump of the ascending limb of Henle's limb can establish a 1,200 mosm/liter concentration difference between the ascending and descending limbs at any given horizontal level. c. by means of countercurrent exchange, the vasa recta preserve the vertical osmotic gradient while supplying blood to the medullary tissue. d. the collecting tubules of all nephrons utilize the driving force of the vertical osmotic gradient to accomplish variable H2O reabsorption under the control of vasopressin, which governs their permeability. e. the filtrate is isotonic as it enters the loop of Henle, hypertonic at the tip of the loop of Henle, and hypotonic as it leaves the loop of Henle.
The display of chromosome pairs arranged by size and similar features is known as the
A. genotype. B. Punnet square. C. karyotype. D. heredity gel.
A square knot is often used to tie a cow
Indicate whether the statement is true or false
Sustained contraction and tension in a skeletal muscle is called tetanus.
Answer the following statement true (T) or false (F)