Which Sequence Correctly Lists the Different Levels of Biological Organization

question 12

Multiple Choice

Which sequence correctly lists the different levels of biological organization, from the smallest and simplest to the largest and most complex?

• A) cells-organs-tissues-organ systems-organism
• B) cells-tissues-organ systems-organs-organism
• C) tissues-cells-organs-organ systems-organism
• D) tissues-organs-organ systems-organism-cells
• E) cells-tissues-organs-organ systems-organism

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Definitions:

Ligand-Gated Channels

Ion channels in cell membranes that open or close in response to the binding of a chemical signal (ligand), allowing ions to pass through the membrane.

Synaptic Vesicles

Membrane-bound sacs within presynaptic neurons that store neurotransmitters, which are released into the synaptic cleft to transmit signals to other neurons.

Neurotransmitter

Chemical substances released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.

Ion

An atom or molecule with a net electric charge due to the loss or gain of one or more electrons, essential in a wide array of biological processes.