Which cellular projections are specialized to receive information from other neurons?

Which cellular projections are specialized to receive information from other neurons?

• A. Neuron
• B. Nucleus
• C. Muscle fiber
• D. Dendrites

Answer: (D)

Dendrites are the structures that receive information from other neurons. These branched projections extend from the neuron's cell body and are rich with receptors for neurotransmitters released at synapses. The large surface area, including specialized knobs called dendritic spines, allows many synaptic inputs to be detected and integrated. When neurotransmitters bind to receptors on a dendrite, they produce postsynaptic potentials that can summate and influence whether the neuron fires an action potential. The other options aren’t receiving projections: a neuron is the whole cell, the nucleus is just an internal organelle, and a muscle fiber is an effector cell that responds to neural signals rather than serving as a primary recipient of synaptic input.

Dendrites are the structures that receive information from other neurons. These branched projections extend from the neuron's cell body and are rich with receptors for neurotransmitters released at synapses. The large surface area, including specialized knobs called dendritic spines, allows many synaptic inputs to be detected and integrated. When neurotransmitters bind to receptors on a dendrite, they produce postsynaptic potentials that can summate and influence whether the neuron fires an action potential. The other options aren’t receiving projections: a neuron is the whole cell, the nucleus is just an internal organelle, and a muscle fiber is an effector cell that responds to neural signals rather than serving as a primary recipient of synaptic input.