Quiz on Skin Structures

What is the structure labeled 'A' in the diagram?

• Hair

• Sweat gland

• Sebaceous gland

• Blood vessel

Answer explanation

The structure labeled 'A' is identified as 'Hair' because it is a filamentous projection from the skin, while the other options like sweat glands, sebaceous glands, and blood vessels have distinct appearances that do not match.

Which layer is labeled 'B' in the diagram?

• Dermis

• Epidermis

• Hypodermis

• Subcutaneous layer

Answer explanation

The layer labeled 'B' in the diagram is the Epidermis, which is the outermost layer of the skin. It provides a protective barrier and is distinct from the Dermis and Hypodermis layers beneath it.

Identify the structure labeled 'C'.

• Sweat gland

• Nerve cell

• Epidermis

• Fat cell

Answer explanation

The structure labeled 'C' is identified as a nerve cell, which is responsible for transmitting signals in the body. The other options, such as sweat gland, epidermis, and fat cell, serve different functions and are not correct.

Identify the structure labeled 'D'.

• Nerve ending

• Hair follicle

• Blood vessel

• Sweat gland

Answer explanation

The structure labeled 'D' is identified as a blood vessel because it typically appears as a tubular structure within tissues, facilitating the transport of blood, unlike the other options which have distinct forms and functions.

What is the structure labeled 'E'?

• Dermis

• Fat cells

• Muscle layer

• Blood vessels

Answer explanation

The structure labeled 'E' is the dermis, which is the layer of skin beneath the epidermis. It contains connective tissue, hair follicles, and glands, distinguishing it from fat cells, muscle layers, and blood vessels.

What is the structure labeled 'F'?

• Hair erector muscle

• Hair follicle

• Hair

• Blood vessels

Answer explanation

The structure labeled 'F' is the hair erector muscle, which is responsible for causing hair to stand up when contracted.

Which structure is responsible for producing sweat?

• F

• G

• H

• J

Answer explanation

The structure responsible for producing sweat is the sweat gland, which is represented by choice J. Sweat glands play a crucial role in thermoregulation and excretion.

Which layer is labeled 'I' in the diagram?

• Epidermis

• Dermis

• Hypodermis

• Subcutaneous layer

Answer explanation

The hypodermis, also known as the subcutaneous layer, is the layer labeled 'I' in the diagram. It lies beneath the dermis and is primarily composed of fat and connective tissue, providing insulation and cushioning.

What is the structure labeled 'G' known for?

• Producing oil

• Storing fat

• Producing sweat

• Supplying blood

Answer explanation

The structure labeled 'G' is known for storing fat, which serves as an energy reserve and insulation for the body as it is composed of a collection of fat cells.

Which of the following is a key role of the structure marked 'H' in the diagram?

• Secretes sebum

• Secretes perspiration

• Acts as a barrier to pathogens

• Holds the hair in place

Answer explanation

The structure marked 'H' is a sebaceous gland, which is responsible for secreting sebum, an oily substance that helps to lubricate and protect the skin and hair.