Cells in this outer epidermal layer are dead, flattened, packed with keratin, and shed from the surface. Which layer is it?

Which epidermal layer contains the dividing stem cells that replace keratinocytes lost at the skin surface?

Keratinocytes in one epidermal layer begin to flatten and release waterproofing granules before they die. Which layer is this?

In which epidermal layer do keratinocytes appear spiny because strong junctions hold neighboring cells together as tissue shrinks during preparation?

Thick skin on palms and soles has a clear layer of dead keratinocytes between the granular and outer layers. Which layer is it?

A dark pigment is transferred to nearby keratinocytes to help shield their DNA from ultraviolet radiation. Which cell makes it?

Which epidermal layer is the deepest one directly attached to the basement membrane?

The flakes that come off when dry skin peels or when a person has dandruff are shed cells from which epidermal layer?

Which epidermal layer, several cells thick, lies directly above the stratum basale?

Which epidermal layer is named for the grainy appearance of keratinocytes accumulating protein granules?

Merkel cells pair with sensory nerve endings to detect light touch. In which epidermal layer are they found?

In most skin, which epidermal layer is the most superficial one whose keratinocytes are still alive?

A receptor deep in the dermis responds best to heavy pressure and vibration. Which receptor is it?

A light touch on a fingertip is detected by a small receptor in the dermal papillae. Which structure is it?

Pain from a paper cut is carried by simple sensory endings near the epidermis. Which structure is doing this job?

A tiny smooth muscle contracts and pulls a hair upright, producing goose bumps. Which dermal structure is it?

Which dermal structure contains capillary loops that help nourish the avascular epidermis above it?

A sensory network wrapped around a hair root fires when the hair shaft bends. Which structure is it?

The deeper dermis gives skin strength because it contains dense irregular connective tissue. Which layer is this?

The superficial dermis forms ridges that increase contact with the epidermis. Which layer is this?

A receptor in skin responds to stretching during sustained pressure, such as when a joint angle changes. Which receptor is it?

Which dermal component makes collagen and elastin fibers that help skin resist tearing and return to shape?

A small blood vessel in the dermis widens to release heat from the body surface. Which structure changed diameter?

A student feels a cold metal probe on the skin before feeling pain. Which skin structure commonly detects the temperature change?

A cut bleeds because it has passed through the avascular surface covering into a vascular layer. Which layer has been reached?

Branching immune cells that capture invading pathogens and present them to the immune system are found throughout the epidermis but are most concentrated in one layer. Which layer is that?

A first-degree burn reddens skin but does not blister because injury is limited to which region?

A burn forms blisters because fluid collects after damage extends below the surface covering. Which layer is involved?

An injection meant to reach subcutaneous fat must pass below the dermis. Which layer receives the medication?

The fingerprint pattern on a fingertip is produced by ridges where the epidermis follows projections from which layer?

A third-degree burn destroys the full thickness of the skin, yet its center may feel numb instead of painful. Why?

A needle that reaches collagen-rich dense irregular connective tissue but not fat is in which layer?

An oily secretion enters the side of a hair follicle and coats the hair and skin surface. Which gland produces it?

A watery secretion used for cooling travels through a duct that opens directly onto the skin surface. Which gland is it?

A thicker secretion from a gland in the armpit empties into a hair follicle rather than directly onto the surface. Which gland is it?

The living growth zone at the base of a hair contains dividing cells that build the hair shaft. Which structure is it?

Which structure is the tube of epidermal tissue that surrounds the hair root in the dermis?

Modified sweat glands in the ear canal produce waxy material that protects the canal. Which gland is it?

New nail cells are produced under the proximal nail fold and push the nail plate forward. Which structure does this?

The visible hard sheet of keratin resting on the nail bed is which structure?