Final answer:
The vertebra prominens refers to the spinous process of C7, which is the seventh cervical vertebra. It is easily palpable in most individuals.
Step-by-step explanation:
The vertebra prominens refers to the spinous process of C7, which is the seventh cervical vertebra. It is also known as the prominent C7 spine located at the base of the neck. Unlike the spinous processes of the other cervical vertebrae, the spinous process of C7 is longer and more prominent, making it easily palpable in most individuals.