Which of the following is an example of a merocrine gland?
Sebaceous gland
Pineal gland
Salivary gland
Mammary gland
A merocrine gland is a type of exocrine gland that releases its secretions through exocytosis, meaning the secretory cells remain intact after secretion. In the case of the salivary gland, it produces and releases saliva into the oral cavity to aid in digestion. The secretory cells of the salivary gland release saliva through exocytosis without any loss of cellular material. This mechanism allows the gland to continuously produce and secrete saliva as needed.
Hence, the correct answer is option 3.