Glands that respond to rising androgen levels are
the sebaceous and sweat glands
.
What are epidermal cells that play a role in the immune response?
Keratinocytes
. Keratinocytes are the predominant cells in the epidermis. They act as the first line of innate immune defence against infection. They express Toll-like receptors (TLRs), which are pattern-recognition receptors (PRRs) that detect conserved molecules on pathogens and trigger an inflammatory response.
What type of gland responds to rising androgen levels during puberty?
The activity of
the sebaceous glands
increases during puberty because of heightened levels of androgens. Sebaceous glands are involved in skin problems such as acne and keratosis pilaris. A blocked sebaceous gland can result in a sebaceous cyst.
What are phagocytic cells that occupy the epidermis?
1. Phagocytic cells that occupy the epidermis are called
epidermal dendritic or Langerhans cells
.
Which organ system controls the activity of the eccrine sweat glands?
The eccrine sweat gland, which is controlled by
the sympathetic nervous system
, regulates body temperature. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation.
What are Pilosebaceous glands?
Pilosebaceous units are found in all regions of the skin except for the palmar and plantar surfaces [Montagna, 1963]. Pilosebaceous units are
most dense on the scalp
, followed by the face, neck, and shoulders. They are relatively sparse on the torso and limbs. The sebaceous glands are multilobular holocrine glands.
Are apocrine glands sweat glands?
Apocrine glands in the skin and eyelid are
sweat glands
. Most apocrine glands in the skin are in the armpits, the groin, and the area around the nipples of the breast. Apocrine glands in the skin are scent glands, and their secretions usually have an odor.
What is the dermal papillae?
Dermal papillae are
fingerlike projections arranged into double rows
, increasing the surface area between the epidermis and dermis, thereby strengthening the juncture with the epidermis and increasing the amount exchange of oxygen, nutrients, and waste.
Where are melanocytes found?
A cell in
the skin and eyes
that produces and contains the pigment called melanin. Anatomy of the skin, showing the epidermis, dermis, and subcutaneous tissue. Melanocytes are in the layer of basal cells at the deepest part of the epidermis.
Is the epidermis made up of connective tissue?
Layers of Skin The skin is composed of two main layers: the epidermis, made of
closely packed epithelial cells
, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures. … The skin consists of two main layers and a closely associated layer.
What granules contain glycolipids?
| front 37 the pigments melanin and _______ contribute to skin color back 37 carotene | front 39 ______ granules contain glycolipids that prevent water loss from the skin. back 39 lamellar | front 40 fibers in the dermis are produced by: back 40 fibroblasts |
|---|
What secretes a lubricant for hair and skin?
Sebaceous gland
, small oil-producing gland present in the skin of mammals. Sebaceous glands are usually attached to hair follicles and release a fatty substance, sebum, into the follicular duct and thence to the surface of the skin.
Which layer of the skin contains sensory nerves and sweat glands?
Below the epidermis is
the dermis
. This is where our blood vessels, nerve endings, sweat glands, and hair follicles are. The dermis nourishes the epidermis. Two types of fibers in the dermis — collagen and elastin — help skin stretch and stay firm.
What does eccrine sweat glands do?
Eccrine sweat glands
help to maintain homoeostasis
, primarily by stabilizing body temperature. Derived from embryonic ectoderm, millions of eccrine glands are distributed across human skin and secrete litres of sweat per day.
Where are eccrine glands?
A type of simple sweat gland that is found
in almost all regions of the skin
. These glands produce sweat that reaches the surface of the skin by way of coiled ducts (tubes). The body is cooled as sweat evaporates from the skin.
What general tissue makes up eccrine glands?
The duct of eccrine gland is formed by two layers of
cuboidal epithelial cells
. Eccrine glands are active in thermoregulation by providing cooling from water evaporation of sweat secreted by the glands on the body surface and emotional induced sweating (anxiety, fear, stress, and pain).
