Melanin Is Produced Only by

question 41

Multiple Choice

Melanin is produced only by

• A)keratinocytes.
• B)Langerhans cells.
• C)melanocytes.
• D)basal cells.
• E)Merkel's cells.

---

Definitions:

Positive Reinforcer

A stimulus that, when introduced following a behavior, increases the likelihood of that behavior occurring again in the future.

Aversive Event

An event that is unpleasant or undesirable and often leads to negative reactions or behaviors in an effort to avoid it.

Positive Event

An occurrence or situation that leads to beneficial or favorable outcomes for an individual or group.

Primary Reinforcer

A naturally reinforcing stimulus, such as food or pain relief, that does not require learning to become effective.