A. Stimulus, effector, efferent pathway, integrating center, afferent pathway, receptor. B.
Stimulus, receptor, efferent pathway, integrating center, afferent pathway, effector. C. Stimulus,
receptor, afferent pathway, integrating center, efferent pathway, effector. D. Stimulus, effector,
afferent pathway, integrating center, efferent pathway, receptor. E. Effector, efferent pathway,
integrating center, afferent pathway, receptor, stimulus. 11. Which one of the following is the
correct sequence for a regulatory reflex arc? wo receptors X and Y, can bind the same signaling
molecule but the concentration of the signal molecules required to reach 50 Y than for X.
Therefore the receptors have the same A. specificity, affinity B. specificity, saturation C. affinity,
specificity D. affinity, competition E. competition, affinity 12. T percent saturation is twice as
great for receptor but different 13. Fick\'s law of diffusion states that the rate of diffusion across
a membrane is A. proportional to concentration gradient, surface area, and membrane
permeability B. proportional to membrane thickness and surface area C. proportional to
membrane thickness and surface area but inversely proportional to concentration gradient D.
proportional to membrane permeability, but inversely proportional to concentration gradient and
surface area 14. Why do solutions for injection or infusion into people with low blood volume
normally contain 150 mMNaCl? A. This is a hypotonic solution, which will cause water
movement into dehydrated blood cells. B. This is an isotonic solution, and the water in it will
follow Na and Cl into the the intracellular fluid compartment. C. This is a hypertonic solution,
which will raise the blood volume and pressure more rapidly than an isotonic solution would D.
This is an isotonic solution, and NaCl will keep the added volume in the extracellula fluid
compartment. E. NaCI are penetrating solutes, which will get them more quickly into blood cells
to increase their volume.
Solution
11, Cis the right answer
Regulatory reflex are neural pathways which controls reflex, which carries sensory infirmation
from receptor to the spinal cord and response generated by the spinal cord to the effector cells
12, C is the right answer
Affinity is a phylogenetic relation ship and specificity is the cange in behaviour and biochemical
variation
13 A is the right answer
Ficks law includes the calculation of rate of diffusion which is directly prportional to the
difference in concentration and inversely proportional to the membrane thickness
14 D is the right answerIsotonic solutions which keeps the added volume in the extracellular
fluid compartments
