Exploring the Integumentary System

Which layer of the skin is primarily responsible for providing structural strength and elasticity?

• Epidermis

• Dermis

• Hypodermis

• Stratum corneum

Explain how the structure of the epidermis contributes to its function as a protective barrier.

• The epidermis is composed of a single layer of cells that are tightly packed.

• The epidermis contains multiple layers of keratinized cells that provide a tough barrier.

• The epidermis is made of loose connective tissue that allows flexibility.

• The epidermis is rich in blood vessels that nourish the skin.

What is the primary function of sebaceous glands in the integumentary system?

• To produce sweat for thermoregulation

• To secrete sebum for skin lubrication

• To produce melanin for UV protection

• To generate new skin cells

Analyze the role of sensory receptors in the skin and how they contribute to the body's response to external stimuli.

• Sensory receptors detect changes in temperature and pressure, allowing the body to react accordingly.

• Sensory receptors are responsible for producing sweat in response to heat.

• Sensory receptors help in the production of vitamin D.

• Sensory receptors are involved in the growth of hair and nails.

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NGSS.MS-LS1-8

Which of the following is a common disorder of the integumentary system characterized by red, itchy, and inflamed skin?

• Psoriasis

• Melanoma

• Vitiligo

• Alopecia

Discuss the process of nail growth and the role of the nail matrix.

• Nails grow from the cuticle, which pushes the nail forward.

• Nails grow from the nail bed, which provides nutrients.

• Nails grow from the nail matrix, where new cells are produced and keratinized.

• Nails grow from the lunula, which is the visible part of the nail root.

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NGSS.MS-LS1-3

Identify the layer of the epidermis where cell division occurs most actively.

• Stratum corneum

• Stratum lucidum

• Stratum granulosum

• Stratum basale

Evaluate the impact of UV radiation on skin cancer development and the role of melanin in protection.

• UV radiation causes skin cancer by directly damaging the dermis.

• UV radiation can lead to skin cancer by causing mutations in the DNA of skin cells, while melanin absorbs UV rays to protect the skin.

• UV radiation has no effect on skin cancer, and melanin is only for pigmentation.

• UV radiation strengthens the skin, reducing the risk of cancer.

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NGSS.HS-LS3-2

Which of the following is NOT a function of the integumentary system?

• Protection against environmental hazards

• Regulation of body temperature

• Production of red blood cells

• Sensory perception

How does the structure of the dermis support its function in the integumentary system?

• The dermis is composed of a single layer of cells that provide a barrier.

• The dermis contains collagen and elastin fibers that provide strength and elasticity.

• The dermis is made of adipose tissue that insulates the body.

• The dermis is rich in keratin, which waterproofs the skin.