A&P06 Integumentary System

An organ consists of  

• skin and bones.
• two or more tissues grouped together that function together.
• at least four tissues grouped together that function together.
• one variety of each of the four tissue types.

The human integumentary system includes  

• skin, nails, hair follicles, and sweat glands.
• the epidermis, dermis, and subcutaneous layer.
• bones and muscles.
• only one type of tissue.

Injections that are administered into the tissues of the skin are called  

• subcutaneous.
• intradermal.
• intramuscular.
• hypodermic.

In the inherited disease ichythyosis, the skin is rough, brown, and very scaly because the uppermost layer cannot peel off as easily as it normally does. The part of the skin that is affected is the  

• epidermis.
• basement membrane.
• dermis.
• subcutaneous layer.

As cells are pushed from the deeper portion of the epidermis toward the surface

• they divide continually.
• their supply of nutrients improves.
• they die.
• they become dermal cells.

Tags

NGSS.HS-LS1-4

The dermis is composed largely of  

• stratified columnar epithelium.
• dense regular connective tissue.
• stratified squamous epithelium.
• dense irregular connective tissue.

Nerve fibers scattered throughout the dermis are associated with  

• hair, melanocytes, and pores.
• bone, tendons, and muscles.
• fingernails and toenails.
• muscles, glands, and sensory receptors.

In a condition called incontinentia pigmenti, the skin has deep dark splotches, due to melanin that seeps down into the dermis. Normally, melanin is confined to the  

• epidermis.
• basement membrane.
• papillae.
• hair.

Exposure to ultraviolet light darkens skin by stimulating synthesis of  

• melanin.
• carotene.
• hemoglobin.
• cyanin.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS4-4

The layer of the epidermis that includes melanocytes and a single row of columnar cells that undergo mitosis is the  

• stratum corneum.
• stratum granulosum.
• stratum spinosum.
• stratum basale.

Tags

NGSS.HS-LS1-4