Integumentary System - Skin & Nail

What is the outermost layer of the skin?

• The stratum corneum

• The dermis

• The hypodermis

• The stratum basale

What is the role of the dermis in the skin?

• The dermis is the outermost layer of skin that protects against environmental damage.

• The dermis is the layer of skin beneath the epidermis that contains connective tissue, blood vessels, and nerve endings.

• The dermis is responsible for the production of melanin, which gives skin its color.

• The dermis acts as a barrier to prevent water loss from the body.

What is the structure labeled as a hair follicle?

• A small tubular structure in the skin from which a hair grows.

• A type of muscle that helps in hair movement.

• A gland that produces oil for the hair.

• A layer of skin that protects the hair root.

What is the arrector pili muscle?

• A muscle that causes hair to stand up when contracted, often in response to cold or fear.

• A type of muscle that helps in digestion.

• A muscle that controls the movement of the eyes.

• A muscle that is responsible for the contraction of the heart.

What is the hypodermis?

• A layer of muscle beneath the dermis

• The outermost layer of skin

• The layer of fat and connective tissue beneath the dermis that insulates the body

• A type of connective tissue found in the dermis

What is the primary function of melanocytes?

• To produce melanin, the pigment responsible for skin color.

• To protect the skin from UV radiation.

• To provide structural support to the skin.

• To regulate body temperature.

What is the role of sweat glands in the skin?

• Sweat glands help regulate body temperature through the secretion of sweat, which cools the body as it evaporates.

• Sweat glands produce oil to keep the skin moisturized.

• Sweat glands are responsible for the production of vitamin D in the skin.

• Sweat glands help in the absorption of nutrients through the skin.

What are the four main layers of the epidermis?

• stratum corneum, stratum granulosum, stratum spinosum, stratum basale

• stratum lucidum, stratum corneum, stratum granulosum, stratum spinosum

• stratum basale, stratum reticulare, stratum corneum, stratum granulosum

• stratum corneum, stratum papillarum, stratum spinosum, stratum granulosum

What is the significance of the stratum corneum?

• It helps in the production of melanin.

• It acts as a barrier to protect underlying tissues from infection, dehydration, and mechanical stress.

• It regulates body temperature through sweat production.

• It is responsible for the sensation of touch.

What is the function of the stratum granulosum?

• It is the layer where skin cells are actively dividing.

• It is a layer where keratinocytes begin to die and keratin production increases, contributing to the skin's barrier.

• It provides the skin with its color and pigmentation.

• It acts as a sensory layer for touch and temperature.