Which of the following cells are examples of excitable cells?

Excitable cells are specialized cells that can generate and propagate electrical signals, a fundamental feature crucial for processes like communication within the nervous system and muscle contraction. Nerve cells (neurons) are known for their ability to transmit electrical impulses rapidly, enabling communication between various parts of the body. Muscle cells (myocytes), on the other hand, respond to stimuli through depolarization and subsequent contraction, which is critical for movement and various physiological functions.

In contrast, the other options consist of cell types that do not exhibit excitability in the same manner. Dermal and epithelial cells primarily serve protective and absorptive functions, without the capability to generate action potentials. Steatocytes (fat cells) and osteocytes (bone cells) are essential for storage and structural support but do not have the ability to conduct electrical impulses. Similarly, adipocytes (fat cells) and hepatocytes (liver cells) fulfill metabolic and storage roles without being excitable.

Thus, the correct answer highlights the two primary categories of excitable cells, underscoring their roles in essential physiological functions related to electrical signaling.