<prompt> Which of the following is a holocrine gland:Sweat glandBreastPancreaSebaceous gland  <response>: Sebaceous gland is a holocrine gland since the discharged secretion contains entire secreting cells. Sweat glands are of two types: Eccrine merocrine is more common in occurence as compared to apocrine variety. Breast mammary gland is modified sweat gland of apocrine variety. Another example for similar type is ceruminous wax gland in the ear. Pancreas is a mixed exocrine endocrine gland. Exocrine secretory units are usually merocrine type. 