Indicate true (T) and false (F) statements below regarding ion channels in cellular membranes. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTT.
( ) With patch-clamp recordings, it is possible to study ion transport through a single molecule of a channel protein.
( ) Cells that are not electrically excitable often lack gated ion channels in their plasma membrane.
( ) The aggregate current crossing a patch of plasma membrane represents the degree to which each individual channel is open at that time.
( ) Patch-clamp recordings have shown that any voltage-gated ion channel opens as soon as the membrane potential is altered.

Question

Indicate true (T) and false (F) statements below regarding ion channels in cellular membranes. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTT.
( )	With patch-clamp recordings, it is possible to study ion transport through a single molecule of a channel protein.
( )	Cells that are not electrically excitable often lack gated ion channels in their plasma membrane.
( )	The aggregate current crossing a patch of plasma membrane represents the degree to which each individual channel is open at that time.
( )	Patch-clamp recordings have shown that any voltage-gated ion channel opens as soon as the membrane potential is altered.

Quizplus · Accepted Answer

The powerful patch-clamp technique can be used to record ion currents through a single ion channel. Using this technique, individual gated channels are observed to randomly flip between open and closed in an all-or-none fashion to generate the aggregate membrane current. Such experiments have also shown that even cells that are not electrically excitable have a variety of gated ion channels.

Indicate True (T) and False (F) Statements Below Regarding Ion