Vestibular glands __________.

• A. contain spongy tissue that fills with blood during arousal
• B. secrete progesterone and estrogen to maintain pregnancy
• C. cover the vagina before sexual intercourse
• D. produce secretions that contribute to semen
• E. secrete lubricating fluid

Answer: (E)

Verified step by step guidance

1. Understand the function of vestibular glands: Vestibular glands, also known as Bartholin's glands, are located near the vaginal opening and are responsible for secreting a lubricating fluid.
2. Identify the role of the lubricating fluid: The fluid secreted by the vestibular glands helps in reducing friction during sexual intercourse, providing comfort and protection to the vaginal tissues.
3. Differentiate from other options: The vestibular glands do not contain spongy tissue that fills with blood, do not secrete hormones like progesterone and estrogen, do not cover the vagina, and do not contribute to semen production.
4. Recognize the anatomical location: The vestibular glands are situated at the posterior part of the vaginal opening, which is crucial for their function in lubrication.
5. Conclude with the correct function: Based on the understanding of their anatomical position and function, the vestibular glands primarily secrete a lubricating fluid, which is the correct answer.