Indicate true (T) and false (F) statements below regarding the microtubule cytoskeleton in neurons. Your answer would be a five-letter string composed of letters T and F only, e.g. TTFFF.
( ) All microtubules in an axon are normally oriented in the same direction.
( ) All microtubules in a dendrite are normally oriented in the same direction.
( ) Each microtubule in an axon has one end at the cell body and its other end at the axon terminal.
( ) Anterograde transport in axons is exclusively carried out by kinesins.
( ) Anterograde transport (toward the tip) in dendrites is exclusively carried out by kinesins.

Question

Indicate true (T) and false (F) statements below regarding the microtubule cytoskeleton in neurons. Your answer would be a five-letter string composed of letters T and F only, e.g. TTFFF.
( )	All microtubules in an axon are normally oriented in the same direction.
( )	All microtubules in a dendrite are normally oriented in the same direction.
( )	Each microtubule in an axon has one end at the cell body and its other end at the axon terminal.
( )	Anterograde transport in axons is exclusively carried out by kinesins.
( )	Anterograde transport (toward the tip) in dendrites is exclusively carried out by kinesins.

Quizplus · Accepted Answer

Essentially all microtubules in axons are oriented with their plus end pointed at the axon terminal. Anterograde movements on these microtubules are exclusive to kinesins. In dendrites, however, the microtubules are of mixed polarity. The microtubules are too short to span the entire length of axons or even dendrites.

Indicate True (T) and False (F) Statements Below Regarding the Microtubule