lecture day 4 integumentary system

What are the primary functions of the integumentary system?

Protection, temperature regulation, synthesis of vitamin D, prevents water loss, excretion and absorption, sensory information transmission, blood reservoir, nonverbal communication.

What is the outermost layer of the skin called?

Epidermis.

What type of epithelial tissue makes up the epidermis?

Keratinized stratified squamous epithelium.

What is the function of the stratum corneum?

Protection.

Which layer of the epidermis is only found in thick skin like palms and soles?

Stratum lucidum.

What occurs in the stratum granulosum?

Keratin is bundled, and cells begin to die.

What type of cells are found in the stratum spinosum?

Dendritic cells, which are phagocytes.

What layer contains the youngest and deepest skin cells?

Stratum basale.

What pigment do melanocytes produce?

Melanin.

What is psoriasis?

A condition where keratinocytes move too quickly from stratum basale to stratum corneum, resulting in abnormal keratin and skin flaking.

What protein carries oxygen in the blood?

Hemoglobin.

What are the two layers of the dermis?

Papillary layer and reticular layer.

What is the hypodermis also known as?

Subcutaneous layer.

What type of glands are sebaceous glands?

Exocrine glands that secrete sebum.

What type of sweat gland functions at puberty and is found in axillary and pubic regions?

Apocrine glands.

What is the method of secretion for merocrine sweat glands?

Merocrine secretion.

How do lines of cleavage in the skin affect wound healing?

Cuts along the lines heal faster, while cuts against the lines may remain open longer.