Osteo Life
What is a cell encased in bone called?
osteocyte
Bone marrow is located in what bone cavity?
medullary
This muscle is striated and involuntary.
cardiac muscle
The thin filament of the muscle is called ______.
actin
The brain and spinal cord make up what major division of the nervous system?
CNS
What is the name of the space where mature bone cells reside?
lacuna
What organic fibers provide flexibility to bone?
collagen
Smooth muscle around internal organs is also known as ________.
visceral muscle
A muscle contraction that does not result in muscle shortening is called________
isometric
The "rest and digest" system is what division of the ANS?
parasympathetic
Undifferentiated bone cells are known as _______?
osteoprogenator or osteogenic cells
The chief structural unit of compact bone, consisting of layers of bone, is known as the ____________.
osteon
Gap junctions are unique to cardiac muscle and are found in the structures known as _________ _____.
intercalated discs
Where is calcium stored for muscle contraction?
sarcoplasmic reticulum
Sensory neurons that carry a signal toward the CNS are called_________
afferent
Bone cells that can be activated by parathyroid hormone.
osteoclasts
In endochondral ossification, bone develops from what?
hyaline cartilage
What is the functional unit of a striated muscle?
sarcomere
A single contraction of a muscle is known as a ______.
twitch
The somatic motor pathway innervates _______
skeletal muscle
Bone matrix is laid down by these cells.
osteoblasts
Bone growth that increases the diameter of bone but not the length is called__________.
appositional growth
What molecule is needed for actin/myosin cross-bridges to release after a contraction?
ATP
Sustained contraction over time without any relaxation is called _______.
tetany or tetanus
What cells produce CSF?
ependymal cells