Quiz 3 A&P I

True

Cartilage has a flexible matrix that can accommodate mitosis of chondrocyte. T/F?

True

Each consecutive bone lamella has collagen fibers that wrap in alternating directions. T/F?

blood vessels and nerve fibers

The canal that runs through the core of each osteon (the Haversian canal) is the site of ________. - adipose tissue and nerve fibers - cartilage and interstitial lamellae - yellow marrow and spicules - blood vessels and nerve fibers

True

The dense fibrous connective tissue portion of the skin is located in the reticular region of the dermis T/F?

the structural unit of compact bone

The osteon is ________. - the structural unit of compact bone - a network of red marrow - the structural unit of spongy bone - a fibrous membrane that covers and protects bone

the organic part of the matrix of bone

What is osteoid? - one of the cell types found in bone - the outer surface of bone - the organic part of the matrix of bone - the inorganic part of the matrix of bone

bone remodeling stages of bone fracture healing: (1) formation of a hematoma, (2) formation of a fibrocartilaginous callus, (3) formation of a bony callus, and (4) bone remodeling.

What is the final stage in the healing of a bone fracture? - bone remodeling - formation of a fibrocartilaginous callus - formation of a hematoma - formation of a bony callus

communication

Which of the following is not a function of the skeletal system? - support - communication - houses the bone marrow which produces blood cells - storage of minerals

Stratum basale

The epidermis consists of five layers of cells, each layer with a distinct role to play in the health, well-being, and functioning of the skin. Which of the following layers is responsible for cell division and replacement?

Tactile cells anchor the skin to the body

Which of the following statements is incorrect? • tactile cell anchor the skin to the body • melanin provides protection against ultraviolet radiation • keratinocytes produce a fibrous protein to protect the epidermis • Langerhans cells activate the immune system

The base will neutralize the acid on the skin that retards the growth of bacteria, and the removal of the normal microbiota of skin will leave the person exposed to opportunistic pathogens.

Why might soap that has an alkaline base not be healthy for some patients to use daily? - The base will neutralize the acid on the skin that retards the growth of bacteria. - The base will cause damage to the epidermis if used daily. - The base will neutralize the acid on the skin that retards the growth of bacteria, and the removal of the normal microbiota of skin will leave the person exposed to opportunistic pathogens. - The removal of the normal microbiota of skin will leave the person exposed to opportunistic pathogens.

resident macrophage-like cells whose function is to ingest antigenic invaders and present them to the immune syste

Although the integument is a covering, it is by no means simple, and some of its functions include ________ - resident macrophage-like cells whose function is to ingest antigenic invaders and present them to the immune system - the dermis providing the major mechanical barrier to chemicals, water, and other external substances - cooling the body by increasing the action of sebaceous glands during high-temperature conditions - epidermal blood vessels serving as a blood reservoir

eyebrow follicles are only active for a few months

Eyebrow hairs are always shorter than hairs on your head because ________. - the vascular supply of the eyebrow follicle is one-tenth that of the head hair follicle - hormones in the eyebrow follicle switch the growth off after it has reached a predetermined length - they grow much slower - eyebrow follicles are only active for a few months

growth hormone

Growth of bones is controlled by a symphony of hormones. Which hormone is of greatest importance for bone growth during infancy and childhood? - somatomedins - thyroid hormone - prolactin - growth hormone

protect the skin from the damaging effects of UV radiation

Sebum does NOT ________. - protect the skin from the damaging effects of UV radiation - protect the skin from bacteria - slow water loss from the skin during low humidity conditions - lubricate the skin

True

The apocrine sweat glands are fairly unimportant in thermoregulation T/F?