keratinization and the epithelial system

If you take a cold shower, the blood vessels in the dermis will ____________ in order to maintain homeostasis.

constrict

Stratum corneum

contains dead cells that are filled with keratin

Stratum lucidum

contains flattened keratinocytes filled with the protein keratohyalin dispersed throughout the cell

Stratum basale

contains keratinocyte stem cells

When the blood vessels in the dermis constrict, blood from from the deeper tissues to the dermis decreases; therefore, heat loss from the body ____________ .

decreases

The subcutaneous layer is ____________ to the dermis.

deep

When you are hot, blood vessels in the dermis _____________ in order to maintain homeostasis.

dilate

When the skin develops a reddish color due to a temporary increase in blood flow, the condition is called:

erythema

Blood vessel dilation in the dermis results in _________ heat loss from the skin, and blood vessel constriction results in _______ heat loss from the skin.

increased, decreased

When blood vessels in the dermis dilate and promote blood flow from the deeper tissues to the skin, the result is that heat loss from the body ____________ .

increases

The components of the subcutaneous layer allow it to provide ____________ for the body.

insulation

Stratum granulosum

keratohyalin accumulates in the cytoplasm of the cells

Stratum spinosum

lipid-filled lamellar bodies form inside the keratinocytes

The vesicles that contain melanin are called ______.

melanosomes

The subcutaneous layer is usually ____________ in women than in men.

thicker

Fingernails are comprised of:

thin, dead scaly cells

Select the regions that are composed of loose connective tissue.

Epidermis of the skin Reticular layer of the dermis Subcutaneous tissue or hypodermis

Which region of the nail contains the stratum basale layer?

The matrix

The subcutaneous layer consists of areolar connective tissue and ____________ connective tissue.

adipose

The connective tissue fibers that extend from the dermis into the subcutaneous layer help ____________ the skin in relation to underlying structures.

stabilize