過去問ぽちぽちby KKM Studio

38th Exam (Jan 2026) Afternoon Q67 Kaigo Fukushishi

Question (original Japanese)

次のうち、バリア機能をもつ表皮の構造として、最も適切なものを1つ選びなさい。

  1. 1汗腺
  2. 2角質層
  3. 3基底層
  4. 4有棘層(ゆうきょくそう)
  5. 5顆粒層(かりゅうそう)
Show answer

Correct answer 2

Key pointThe barrier function of the epidermis is carried out by the outermost stratum corneum.

Explanation

The stratum corneum (角質層) is the outermost layer of the epidermis. It has a barrier function that prevents water from evaporating and prevents bacteria and foreign substances from entering.

  • 1: Sweat glands are appendages that release sweat to regulate body temperature and are not a layer of the epidermis, so it is incorrect.
  • 3: The basal layer is the deepest layer of the epidermis, where new cells are made, so it is incorrect.
  • 4: The prickle cell layer is a thick layer above the basal layer and is not the center of the barrier, so it is incorrect.
  • 5: The granular layer is the layer below the stratum corneum that prepares for keratinization, so it is incorrect.
Explanation in Japanese

角質層は表皮のいちばん外側の層で、水分の蒸発を防ぎ、細菌や異物の侵入を防ぐバリア機能をもっています。

  • 1:汗腺は汗を出して体温調節をする付属器で、表皮の層ではないので誤り。
  • 3:基底層は表皮の最も深い層で、新しい細胞をつくる層なので誤り。
  • 4:有棘層は基底層の上にある厚い層で、バリアの中心ではないので誤り。
  • 5:顆粒層は角質層の下の層で、角化の準備をする層なので誤り。

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