Graded potentials
A) produce an effect that increases with distance from the point of stimulation.
B) produce an effect that spreads actively across the membrane surface.
C) may be either a depolarization or a hyperpolarization.
D) are often all-or-none.
E) cause repolarization.
C
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If it were not for the __________, osteocytes in the outer lamellae of an osteon would not be able to transport their wastes to the bloodstream for removal.
A. matrix B. nutrient canals C. canaliculi D. trabeculae E. ruffled border
Which is NOT a function of the Golgi apparatus?
A. sorting of proteins destined for various locations in the cell B. modifying proteins destined for secretion C. packaging enzymes destined for lysosomes D. addition of carbohydrate groups to proteins E. transcribing a signal sequence onto proteins destined for secretion
Similar to neurotransmitters, hormones exert their action only on cells that have specific _______________ that the hormones bind to.
a) gated channels b) receptors c) metabolic pathways
In general, the mechanical stresses on bones that result from exercise tend to weaken them and lead to more frequent fractures.
Answer the following statement true (T) or false (F)