Sensory impulses originate at receptors in response to
A. local changes in their cell membrane potentials.
B. decreasing permeability of nerve cell membranes.
C. neurotransmitters.
D. subthreshold potential.
Answer: A
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Lymphatic capillaries are able to receive cellular debris and foreign particles because ________________.
A) of the structure of their flaplike valves B) the fluid pressure is so great it forces this material into the capillaries C) lymphatic and cardiovascular capillaries are designed to receive this material D) of amoeboid motion of the foreign particles
Compare the minor and major calyces
A) The minor calyx is an internal cavity and the major calyx is an external cavity. B) The minor calyces are located in the renal cortex and the major calyces are located in the renal medulla. C) The minor calyces are located in the renal medulla and the major calyces are located in the renal cortex. D) The minor calyces collect urine from a single lobe and the major calyces collect urine from 4-5 minor calyces. E) The minor calyces collect urine from juxtamedullary nephrons and the major calyces collect urine from cortical nephrons.
This figure shows a posterior view of the organs of the female reproductive system. What structures does number 6 indicate?
A. Mesosalpinx B. Fimbriae C. Ovarian tubules D. Mesovaria E. Cilia
The products of lipid digestion diffuse into the intestinal epithelium as micelles
Indicate whether the statement is true or false.