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
