Anatomy | Imbalances of the Integumentary System

The video tutorial covers various conditions of the integumentary system, starting with burns and moving on to more pleasant topics like albinism, nevi, freckles, and hemangiomas. Albinism is explained as a genetic condition caused by a deficiency in the enzyme tyrosinase, leading to a lack of melanin. Nevi are described as localized overgrowths of melanocytes, while freckles are areas of increased melanocyte activity. Hemangiomas are benign blood vessel tumors, often seen in infants. The video emphasizes the importance of understanding these conditions and differentiating between them.

What is the primary cause of albinism?

• A deficiency in the enzyme tyrosinase

• A viral infection

• An overproduction of melanin

• Excessive sun exposure

Why must individuals with albinism be cautious in the sun?

• Their skin is naturally oily

• They have more melanin, which attracts sunlight

• Their DNA is not protected by melanin

• They are more prone to dehydration

Which of the following best describes a nevus?

• A localized overgrowth of melanocytes

• A type of skin cancer

• An area of increased melanocyte activity

• A deficiency in melanin production

What is the main difference between a nevus and freckles?

• Nevus is always malignant, while freckles are not

• Nevus is an overgrowth of melanocytes, while freckles are increased activity

• Freckles are caused by a virus, while nevus is genetic

• Freckles are larger than nevus

What factors influence the pigmentation of freckles?

• Diet and exercise

• Skin type and climate

• Sun exposure and heredity

• Age and gender

What is a hemangioma?

• A genetic disorder affecting melanin

• A type of freckle

• A benign blood vessel tumor

• A malignant skin tumor

How are hemangiomas typically characterized?

• As a result of sunburn

• As contagious skin conditions

• As skin discoloration due to benign tumors

• As painful and itchy