Answer: neuron.
- A neuron
- B nephron
- C alveolus
- D sarcomere
Correct answer: A. neuron
Explanation: The neuron (nerve cell) is the unit of nervous tissue.
The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).
Concept context
The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.