Bones 1
Bones 2
Joints 1
Joints 2
Muscles 1
Muscles 2
100
The number of bones in the human body.
What is 206?
100
One function of the skeletal system is hematopoiesis, which means this.
What is blood cell production?
100
Synovial joints are synonymous with this functional classification.
What is diarthrosis?
100
Spreading your fingers is this type of movement.
What is abduction?
100
Another name for muscle cell.
What is muscle fiber?
100
This muscle type relies completely on the nervous system for contraction.
What is skeletal muscle?
200
These are young bone cells that build and construct bones by calcifying bone as it forms.
What are osteoblasts?
200
A cranial suture falls into this functional classification.
What is synarthrosis?
200
Lubrication in the joints is one function of this.
What is synovial fluid?
200
The functional unit of a muscle fiber.
What is the sarcomere?
200
The connective tissue that attaches muscle to bone.
What is tendon?
300
The connective tissue that joins one bone to another.
What are ligaments?
300
The pubic symphysis is this type of STRUCTURAL articulation.
What is cartilaginous?
300
The type of joint that allows your thumb to be oppositional to your other fingers.
What is saddle joint?
300
The fusion of many myoblast cells results in this unique characteristic of skeletal muscle.
What is multi-nucleated?
300
The neurotransmitter that is released from vesicles into the synaptic cleft.
What is acetylcholine (ACh)?
400
These cells play a critical role in the in the bone remodeling process by breaking down bone matrix that is not needed or is damaged.
What are osteoclasts?
400
Arthritis starts with wear and tear on this.
What is articular cartilage?
400
Bending your elbow reduces the angle of the joint, making it this type of movement.
What is flexion?
400
Thick filaments are composed of this protein.
What is myosin?
400
The influx of this at the terminal end of the neuron causes the release of neurotransmitter.
What are calcium ions (Ca++)?
500
The end part of a long bone involved in articulation.
What is the epiphysis?
500
The structural joint that allows articulation of the mandible.
What is synovial?
500
Rotating the wrist so the palm is anterior, is this type of movement.
What is supination?
500
In addition to actin, thin filaments contain these two proteins.
What is troponin and tropomyosin?
500
During a contraction, the thick filaments pull the thin filaments towards this.
What is the M line?
600
The type of synovial joint between articulating carpals.
What is plane or gliding?
600
The synovial joint that allows maximal movement.
What is ball-and-socket?
600
Many tandem sarcomeres, or the grouping of thin and thick filaments, are collectively called this.
What is a myofibril?
600
Where a neuron communicates with a muscle fiber.
What is the neuromuscular junction (NMJ)?
700
The definition of amphiarthrosis.
What is slightly moveable?
700
The joint between vertebrae C1 and C2 is an example of this type of joint.
What is pivot?
700
The extension of the sarcolemma into the cell that surrounds each myofibril.
What are T-tubules?
700
T-tubules allow this to travel from the sarcolemma to the interior of the cell.
What is an action potential?
800
Ankle extension can also be called this type of movement.
What is plantar flexion?
800
The bones of the pelvis and the bones of the skull are held together by this type of STRUCTURAL joint.
What is fibrous?
800
Specialized organelle that stores calcium ions.
What is the sarcoplasmic reticulum?
800
Influx of this into the sarcolemma at the motor end plate allow an action potential to propagate along the membrane.
What are sodium ions (Na+)?