Question

1. __ sense light touch
2. __ most abundant epidermal cell
3. __ produce a pigment that determines hair, skin, and eye color
4. __ produce a protein that helps protect the epidermis and make it waterproof
5. __ also known as tactile epithelial cells
6. __ formed in the bone marrow and migrate to the stratum spinosum

40 __ produced in the stratum basale, but get pushed up by new cells beneath them

1. __ produces a substance that blocks uv radiation from damaging keratinocytes
2. __ die as they move higher up the epidermis
3. __ you shed millions daily
4. __ ingest foreign substances and activate our immune system
5. __ located in the junction between the dermis and epidermis
6. __ production of these cells is stimulated by friction
7. __ only found in the stratum basale

matching - layers of the epidermis: match each description to the layer of the epidermis it describes. each layer can be used once, multiple times, or zero times.

1. __ living layer, but where cells are beginning to die
2. __ where lamellar bodies are released
3. __ a single row of stem cells that rapidly undergo mitosis, creating keratinocytes and pushing them up
4. __ 20 to 30 layers of squamous anucleate keratinocytes
5. __ \clear layer\

options (for cell - related questions):
c. merkel cells
d. keratinocytes
options (for layer - related questions):
a. stratum granulosum
b. stratum corneum
c. stratum spinosum
d. stratum lucidum
e. stratum basale

Explanation:

To solve these matching questions, we analyze each description and match it to the correct cell or epidermal layer based on knowledge of skin anatomy:

Matching - Cells (Questions 34 - 47)

• 34. Sense light touch: Merkel cells (C) are tactile cells that sense light touch.
• 35. Most abundant epidermal cell: Keratinocytes (D) are the most numerous cells in the epidermis.
• 36. Produce a pigment (melanin) for hair/skin/eye color: Melanocytes (A) produce melanin.
• 37. Produce a waterproof protein (keratin): Keratinocytes (D) produce keratin.
• 38. Tactile epithelial cells: Merkel cells (C) are also called tactile epithelial cells.
• 39. Formed in bone marrow, migrate to stratum spinosum: Langerhans cells (B, though not labeled here, but contextually, the options likely include this; however, based on the given options, if B is Langerhans, then B. If not, re - evaluate. Assuming B is Langerhans: B)
• 40. Produced in stratum basale, pushed up: Keratinocytes (D) start in stratum basale and move up.
• 41. Blocks UV radiation (melanin): Melanocytes (A) produce melanin which blocks UV.
• 42. Die moving up epidermis: Keratinocytes (D) die as they move to upper layers.
• 43. Shed millions daily: Keratinocytes (D) are shed from the skin surface.
• 44. Ingest foreign substances, activate immune system: Langerhans cells (B) are immune - related cells in the epidermis.
• 45. Located at dermis - epidermis junction: Merkel cells (C) are at this junction.
• 46. Production stimulated by friction: Keratinocytes (D) production can be stimulated by friction (callus formation).
• 47. Only in stratum basale: Melanocytes (A) and Merkel cells (C) are in stratum basale; if A is melanocytes, A. If C is Merkel, C. Assuming A (melanocytes) are only in stratum basale: A.

Matching - Layers of Epidermis (Questions 48 - 52)

• 48. Living layer, cells beginning to die: Stratum granulosum (A) is a living layer where cells start to die as they produce keratin.
• 49. Where lamellar bodies are released: Stratum granulosum (A) releases lamellar bodies.
• 50. Single row of stem cells (mitosis, create keratinocytes): Stratum basale (E) has stem cells that undergo mitosis.
• 51. 20 - 30 layers of squamous anucleate keratinocytes: Stratum corneum (B) is the outermost layer with dead, anucleate keratinocytes.
• 52. “Clear layer”: Stratum lucidum (D) is the clear layer (found in thick skin).

Final Answers (Selected Questions as Examples)

• 34. C. Merkel cells
• 35. D. Keratinocytes
• 36. A. (Assumed melanocytes)
• 37. D. Keratinocytes
• 38. C. Merkel cells
• 48. A. Stratum granulosum
• 49. A. Stratum granulosum
• 50. E. Stratum basale
• 51. B. Stratum corneum
• 52. D. Stratum lucidum

(Note: For questions 39, 44, 46, 47, the exact match depends on the full set of options. If the options for cells include Langerhans cells as B, then:

• 39. B. (Langerhans cells)
• 44. B. (Langerhans cells)
• 46. D. Keratinocytes
• 47. A or C depending on the cell type)

Answer:

To solve these matching questions, we analyze each description and match it to the correct cell or epidermal layer based on knowledge of skin anatomy:

Matching - Cells (Questions 34 - 47)

• 34. Sense light touch: Merkel cells (C) are tactile cells that sense light touch.
• 35. Most abundant epidermal cell: Keratinocytes (D) are the most numerous cells in the epidermis.
• 36. Produce a pigment (melanin) for hair/skin/eye color: Melanocytes (A) produce melanin.
• 37. Produce a waterproof protein (keratin): Keratinocytes (D) produce keratin.
• 38. Tactile epithelial cells: Merkel cells (C) are also called tactile epithelial cells.
• 39. Formed in bone marrow, migrate to stratum spinosum: Langerhans cells (B, though not labeled here, but contextually, the options likely include this; however, based on the given options, if B is Langerhans, then B. If not, re - evaluate. Assuming B is Langerhans: B)
• 40. Produced in stratum basale, pushed up: Keratinocytes (D) start in stratum basale and move up.
• 41. Blocks UV radiation (melanin): Melanocytes (A) produce melanin which blocks UV.
• 42. Die moving up epidermis: Keratinocytes (D) die as they move to upper layers.
• 43. Shed millions daily: Keratinocytes (D) are shed from the skin surface.
• 44. Ingest foreign substances, activate immune system: Langerhans cells (B) are immune - related cells in the epidermis.
• 45. Located at dermis - epidermis junction: Merkel cells (C) are at this junction.
• 46. Production stimulated by friction: Keratinocytes (D) production can be stimulated by friction (callus formation).
• 47. Only in stratum basale: Melanocytes (A) and Merkel cells (C) are in stratum basale; if A is melanocytes, A. If C is Merkel, C. Assuming A (melanocytes) are only in stratum basale: A.

Matching - Layers of Epidermis (Questions 48 - 52)

• 48. Living layer, cells beginning to die: Stratum granulosum (A) is a living layer where cells start to die as they produce keratin.
• 49. Where lamellar bodies are released: Stratum granulosum (A) releases lamellar bodies.
• 50. Single row of stem cells (mitosis, create keratinocytes): Stratum basale (E) has stem cells that undergo mitosis.
• 51. 20 - 30 layers of squamous anucleate keratinocytes: Stratum corneum (B) is the outermost layer with dead, anucleate keratinocytes.
• 52. “Clear layer”: Stratum lucidum (D) is the clear layer (found in thick skin).

Final Answers (Selected Questions as Examples)

• 34. C. Merkel cells
• 35. D. Keratinocytes
• 36. A. (Assumed melanocytes)
• 37. D. Keratinocytes
• 38. C. Merkel cells
• 48. A. Stratum granulosum
• 49. A. Stratum granulosum
• 50. E. Stratum basale
• 51. B. Stratum corneum
• 52. D. Stratum lucidum

(Note: For questions 39, 44, 46, 47, the exact match depends on the full set of options. If the options for cells include Langerhans cells as B, then:

• 39. B. (Langerhans cells)
• 44. B. (Langerhans cells)
• 46. D. Keratinocytes
• 47. A or C depending on the cell type)