Chapter_5_Integumentary_System_edited_with_recordings_1___2___1_

What are the four tissues that make up the body?

Epithelial, connective, muscle, and nervous tissues.

What is the primary function of exocrine glands?

To secrete substances through ducts to the external environment.

Why is skin considered a membrane?

Skin is a membrane because it covers and protects underlying tissues and organs.

Define homeostasis.

The maintenance of stable internal conditions in an organism.

What is negative feedback?

A process that counteracts a change to bring a system back to its set point.

What are the two main regions of the skin?

The epidermis and the dermis.

What is the hypodermis and its function?

The hypodermis is the subcutaneous tissue that attaches the skin to underlying tissues, providing insulation and energy storage.

What are the five layers of the epidermis, from deepest to most superficial?

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum.

What cells are most numerous in the stratum basale?

Keratinocytes.

What is the role of melanocytes in the skin?

Melanocytes produce melanin, which contributes to skin color.

What type of connective tissue is the dermis primarily made of?

Dense irregular connective tissue.

What are the functions of the skin?

Protection, water loss regulation, waste elimination, vitamin D production, sensory information gathering, and body temperature regulation.

What is hyperthermia?

A condition of having a body temperature greatly above normal.

What are the ABCDE rules for detecting melanoma?

Asymmetry, irregular Borders, uneven Color, Diameter greater than 6mm, Evolving characteristics.

What distinguishes basal cell carcinoma from other skin cancers?

It is the most common type of skin cancer and less likely to metastasize.

What characterizes a third-degree burn?

A full-thickness burn that affects all layers of the skin.

What happens to the skin as a person ages?

Decreased cell mitosis, thinner dermis, loss of adipose tissue, reduced collagen, and formation of wrinkles.

Why is homeostasis important for the skin?

It helps in regulating body temperature, protecting against pathogens, and maintaining overall health.