Quizzes exam 2

In which layer of the epidermis is mitosis active?

stratum basale

when you look through the microscope at skeletal and cardiac muscles, you see striations. What are these striations?

A bands and l bands

What is melanin:

A brown-black pigment found in melanocytes

What is the name of the muscle that is connected to the hair follicle and produces "goose bumps" when it contracts?

Arrector Pili Muscle

In which layer of the epidermis would you find melanocytes?

Basal cell layer

Which gland functions in thermoregulation?

Eccrine gland

what two movements are carried out when you open and close your mouth

Elevation and Depression

Osteoblast, osteocyte, and osteoclast are all derived from a common ancestor

False

The integumentary system consists of __

Hair, skin, nails, sweat glands, oils glands

Which anatomical term describes a rounded passageway for blood vessels and nerves?

Foramen

a type of synarthrosis that binds each tooth to the surrounding bony socket is a ___

Gomphosis

the part of the sarcomere that contains thick filaments but no thin filaments is the __

H zone

bones that participate in a synovial joint have ____ cartilage at the end of each bone

Hyaline

Which type of cell is the most abundant epithelial cell in the body and dominates the cellular composition of the epidermis?

Keratinocyte

When pyruvic acid is produced by anaerobic metabolism faster than it can be utilized, the surplus is converted to __________.

Lactic acid

all of the muscle fibers controlled by a single motor neuron is called

Motor unit

The process of replacing other tissue with bone is called:

Ossification

The cell type that is responsible for basic cell formation is the:

Osteoblast

Which structure is contained within the lacuna of the bone?

Osteocyte

What is the basic functional unit of compact bone?

Osteon

Which layer of the dermis contains areolar tissue and is found immediately under the epidermis?

Pappilary layer

One function of bone is to produce red and white blood cells. These cells are made in what substance of bone?

Red Marrow

action potentials must travel along which structure internal to the sarcolemma to cause the release of calcium ions from the sarcoplasmic reticulum?

T tubule

Which of the following is an effect of stress on a bone?

The bone will become thicker

Which of the following are NOT structural components of compact bone?

Trabeculae

For tropomyosin to be shifted off its position covering the active sites of G actin molecules, calcium ions must bind to which structure?

Troponin

Damage to the epiphyseal plate in a prepubescent individual could stunt bone development:

True

The skeleton framework is initially hyaline cartilage which is replaced by bone.

True

what is a disthrosis

a freely moveable joint

A bursa is _____ that decreases friction within a synovial joint

a sac of synovial fluid

what is a cranial suture an example of

a synarthrosis

a slightly moveable joint is called

amphiarthrotic

Pushing against a locked door is an example of

an isometric contraction

Long bones, such as the femur, increase in size throughout childhood by _______

both interstitial and appositional growth

What are the two layers of the cutaneous membrane?

epidermis and dermis

Spongy bone is found primarily at which part of long bone?

expanded ends, where long bones articulate with other skeletal elements

The sternum is an example of a:

flat bone

Appositional growth ___

increases the diameter of long bone

Vertebrate of the vertebral column are examples of:

irregular bones

What is the function of sebum?

lubricate the skin to protect against friction, make it more impervious to moisture

The outer surface of the bone, the periosteum:

provides a route for circulatory and nervous supply, isolates the bone from surrounding tissues, actively participates in bone growth and repair - all of the above

the amphiarthrotic articulation that limits movements between the two pubic bones in the ___

pubic symphysis

Beginning at the basement membrane and working toward the free surface, the layers of the epidermis are

stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum

Which strata is only found in thick skin?

stratum lucidum layer

Your hand is pronated when

your palm is facing prosterior