Melanin is found in which cells?
Select one:
a. Only melanocytes
b. Both melanocytes and keratinocytes
c. Only keratinocytes
d. Both melanocytes and Langerhans cells
Answer:- a. Only melanocytes
Explanation:- melanocytes is a type of cell which produce melanin (Pigment in the epidermis) which protect body against harmful radiation like ultraviolet light.
-These cells have long processes that extend between
keratinocytes
Melanin is packages into melanosomes
These travel through the processes
The keratinocytes "phagocytize" the tips of the processes
Melanin moves into keratinocytes...Thanks dear student
Melanin is found in which cells? Select one: a. Only melanocytes b. Both melanocytes and keratinocytes...
4. In which of layer of the skin can the stem cells of keratinocytes be found? a. Stratum Lucidum b. Stratum Granulosum c. Stratum Basale d. Stratum Corneum e. All the above
Common benign papillomas develop when _____ are invaded by papillomavirus (HPV). A. melanocytes B. subcutaneous cells C. keratinocytes D. sebaceous glands Which of the following is often a CHRONIC type of rash? A. Seborrheic dermatitis. B. Folliculitis. C. Pityriasis rosea. D. Impetigo Which of the following is usually an acute self-limited condition? A. Eczema. B. Rosacea. C. Viral exanthems. D. Psoriasis. An example of erythema intertrigo is A. Acne. B. Scabies. C. Icthyosis vulgaris. D. Diaper rash. Rosacea is caused...
Melanocytes are a type of skin cell that produce melanin, a pigment derived from a protein which protects the cell's DNA from sunlight. A melanocyte has been exposed to sunlight for several hours and thus has been expressing the MCR1 gene, which ultimately causes the production of melanin. The sunlight suddenly disappears. What is the most energy efficient way for the melanocyte to adjust this change? A) Stop the transcription of the MCR1 gene. B) Use RNAi to destroy the...
Q14: What is the proper anatomical term for the upper-middle abdominopelvic region? A) Epigastric B) Inguinal C) Lumbar D) Umbilical pores Q15: Exocrine glands: A) Lack a duct, and release their product directly onto the surface of the relevant tissue or into the extracellular fluid B) Have a duct, into which the product is first released C) Are always composed of Goblet cells D) Are found in the epidermis basic types of Q16: Which cells produce and release pigment? A)...
20. Loss of hair that most likely has a genetic basis A. alopecia B. melanoma C. nevus Dacne E. all of the above scalp hair". 21. "Rapunzel, Rapunzel, let down your long A. vellus B. terminal C. lanugo D. angora E. alopecia 22. A third-degree burn destroys portions of the entire thickness of the skin but not the underlying muscles A. True B. False 23. Allows one to detect wind blowing through hair, or a playful tug on a ponytail...
Q10: Cartilage is a type of: A) Supporting connective tissue B) Connective tissue proper C) Both A & B D) Neither A nor B Q11: Peroxisomes are a type: A) Protein B) Cell C) Non-membranous organelle D) Membranous organelle Q14: What is the proper anatomical term for the upper-middle abdominopelvic region? A) Epigastric B) Inguinal C) Lumbar D) Umbilical Q13: Apocrine glands secrete by: A) Erupting their cells, which then need to be replaced by mitosis B) Erupting part of...
Can you identify which structures are found in animal cells only, plants only, or both? A) Cytoplasm B) Ribosomes C) Nuclear membrane D) Mitochondria E) Vacuole F) Golgi G) Smooth ER H) Centrioles I) nucleolus
Q46. Which organ system is responsible for fighting pathogens? A) Lymphatic B) Muscular C) Endocrine D) Urinary Q49. Bone is a type of: A) Connective tissue proper B) Fluid connective tissue C) Supporting connective tissue D) Non-calcified cartilage Q47. The stratum lucidum is found only in: A) Epidermis of thin skin B) Epidermis of thick skin C) Dermis of thin skin D) Dermis of thick skin Q50. Dense regular tissue is a type of: A) Supporting connective tissue B) Fluid...
Q49. Bone is a type of: A) Connective tissue proper B) Fluid connective tissue C) Supporting connective tissue D) Non-calcified cartilage Q50. Dense regular tissue is a type of: A) Supporting connective tissue B) Fluid connective tissue C) Connective tissue proper D) Layer in the epidermis Q52. What type of cell in the epidermis synthesizes proteins that become nail and hair? A) Melanocytes B) Merkel cells C) Langerhans cells D) Keratinocytes Q53. Fibroblasts are: A) Fibers B) Cell junctions C)...
23. Where are B cells and T cells found? a. only in the blood b. only in the lymph c. primarily in the blood, but some are in the blood d. primarily in the lymph, but some are in the blood