Cells organized into appropriate groupings are held together by what three means?
a. ALMs, extracellular matrix, and carbohydrate molecules
b. CAMs, cholesterol, and carbohydrate molecules
c. CAMs, extracellular matrix, and specialized cell junctions
d. CAMs, cholesterol, and specialized cell junctions
e. ALMs, extracellular matrix, and specialized cell junctions
c
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Which of the following vascular shunts connects the fetal left and right atria?
A) foramen ovale B) ductus venosus C) ductus arteriosus D) fossa ovalis
Detection of the frequency of a sound above 5 kHz is based upon:
A. the number of fibers discharging in cranial nerve VIII B. the phase difference between the sound waves at the two ears C. the direction of deflection of the hair cell cilia D. the location along the cochlea of the most intensely stimulated hair cells E. the frequency of action potentials in cranial nerve VIII
The final breakdown product of starch is
A. peptides. B. glycerol C. maltose. D. glucose.
Which of the following statements is TRUE concerning depolarization of a SA nodal cell?
a. The cell will not depolarize until it receives sympathetic stimulation b. The pacemaker potential is caused by Ca2+ entering the cell via L-type Ca2+ channels. c. The pacemaker potential is slower in achieving threshold when acetylcholine is applied to the SA node cells. d. During depolarization there is a gradually increasing permeability to K+. e. The slope of the depolarization is decreased when norepinephrine is applied to the SA node cells