Which of the following statements concerning erythrocytes is incorrect?
a. erythrocytes do not contain any organelles.
b. erythrocytes may take on many different shapes.
c. erythrocytes originate from the same undifferentiated pluripotential stem cells as leukocytes and platelets.
d. erythrocytes are unable to utilize the O2 they contain for their own ATP formation.
e. erythrocytes only live about 5 days.
E
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Which is not one of the three common structural types of synapses?
A. Axoaxonic B. Axonucleic C. Axosomatic D. Axodendritic
Regeneration within the CNS ________
A) is prevented due to growth-inhibiting proteins of oligodendrocytes B) is more successful than with the PNS C) is promoted by growth inhibitors and glial scars D) typically allows axonal sprouting of 20 mm
The common name for the distal interphalangeal joint is the _____________________________
Fill in the blank(s) with correct word
Which of the following stimuli produces a depolarization that propagates from one end of the membrane to the other?
A) supramaximal B) threshold C) maximal D) All of the Above