5.1 Integumentary Questions Flashcards
The skin and its associated structures form the ____________ system.
Integumentary
The skin is the largest sense organ. What does skin have to detect the senses of heat, cold, pressure, touch and pain?
Nerve endings called sensory receptors.
The homeostasis of body temperature is one of the functions of the _______________________
Integumentary System
What is the role of the skin in thermoregulation?
The regulation of the body’s temperature by increasing and decreasing blood flow in the skin, and producing sweat.
What is the skin’s role in water retention?
The skin forms a barrier that prevents the body from losing too much water.
What vitamin is made in the skin?
Vitamin D that is needed for bone development.
The skin is the first line of defense to prevent bacteria and fungi enter the body. That is important to prevent ________________.
Microbial Infections
A chemical called keratin is present in the outer layer of skin which provides protection against:
Scrapes, cuts, chemicals ..
The skin normally has a pigmented substance that prevents UV rays from penetrating into the body. What is the name of this substance?
Melanin
The superficial layer of skin is called the __________________.
Epidermis
The lowest layer of skin is called the _______________.
Dermis
The ______________ is an accessory organ that lies deep to the dermis skin layer.
Hypodermis
What type of tissue is the epidermis?
Stratified squamous epithelium.
What two proteins are found in the epidermal layer of the skin?
- Keratin
- Melanin
The majority of the skin epidermal cells are called:
Keratinocytes
Keratinocytes make the tough protein called:
Keratin.
What is the function of keratin?
Prevents water loss, damage and infections due to microbes such as bacteria and fungi.
Skin cells are formed by mitosis. TRUE or FALSE
TRUE
Stem cells found in the stratum basale are responsible for:
Mitosis
The epidermis is avascular (lacks blood vessels). True or False
True
Nutrients for the stratum basale diffuse from blood vessels found in the _________________.
Dermis
What cells are found in the stratum basale?
Stem cells, melanocytes, keratinocytes and tactile cells.
Stem cells are concerned with:
Mitosis, thus making new epidermal cells
Tactile cells are concerned with:
The sensation of touch
