[amp_mcq option1=”lymphocytes” option2=”monocytes” option3=”leucocytes” option4=”melanocytes” correct=”option4″]
The correct answer is D. melanocytes.
Melanocytes are cells that produce melanin, the pigment that gives skin, hair, and eyes their color. Melanin is produced in response to ultraviolet (UV) radiation from the sun. When UV radiation hits the skin, it stimulates melanocytes to produce more melanin. This increased melanin production helps to protect the skin from the harmful effects of UV radiation, such as sunburn and skin cancer.
Lymphocytes are a type of white blood cell that plays a role in the immune system. Monocytes are another type of white blood cell that can develop into macrophages, which are cells that engulf and destroy foreign invaders. Leucocytes are a general term for white blood cells, which include lymphocytes, monocytes, and neutrophils.
Melanocytes are located in the epidermis, the outermost layer of skin. They are found in the basal layer of the epidermis, which is the layer of cells that is closest to the dermis. Melanocytes produce melanin in small sacs called melanosomes. Melanosomes are then transferred to keratinocytes, which are the cells that make up the epidermis. Keratinocytes then distribute the melanosomes to the surface of the skin, where they help to protect the skin from UV radiation.