Question

the dendrite is the part of the neuron that

receives electrical messages from other cells.
receives messages from other neurons.
conveys action potentials.
conveys graded potentials to other cells.

Explanation:

To solve this, we recall the function of dendrites in neurons. Dendrites are the branch - like structures of a neuron that receive signals (in the form of neurotransmitters - mediated messages) from the axon terminals of other neurons.

• Option 1: Neurons communicate with other neurons (not all other cells in a general “electrical message” receiving way as described here, and the main input to dendrites is from other neurons).
• Option 2: This is correct. Dendrites receive messages (in the form of neurotransmitters that generate graded potentials) from the axons of other neurons.
• Option 3: The axon is responsible for conveying action potentials, not the dendrite.
• Option 4: Dendrites receive graded potentials (from other neurons' input) and transmit them towards the cell body, not to other cells. Other cells are not the target of dendrite's signal transmission in this way.

Answer:

B. receives messages from other neurons. (Here we assume the options are labeled as A, B, C, D with A being "receives electrical messages from other cells", B being "receives messages from other neurons", C being "conveys action potentials", D being "conveys graded potentials to other cells")