Flashcards in Bones & Muscles Deck (30):
Name the 2 divisions of the skeleton.
Axial and Appenducular
What is red marrow composed of?
Blood Cells: RBCs, WBCs & Platelets
These are the 2 types of protein fibers found in muscles.
Actin & Myosin
Name 5 functions of bone.
Form Blood Cells
Protection of Organs
Support & Framework of Body
Assist in Movement
This is the name of the very dense, non-porous type of bone.
The skull, vertebrae & rib cage all belong to this skeleton.
These muscle filaments are very thin & are important to muscle contraction.
What is ossification?
The hardening of bone.
List 2 general types of joints.
Immovable & Movable
These connect muscles to bone.
Name 2 types of movable joints.
Freely & Slightly movable
These thick fibers contain cross-bridges & are important in muscle contraction.
This is the thin covering surrounding compact bone.
These are the "tunnels" running through compact bone.
When does ossification begin & end?
Begins as an embryo & ends in late teens - early twenties.
True or False: Spongy bone is squishy.
False: it is porous, but solid.
Name 3 types of muscles.
Smooth, Cardiac, & Skeletal
These connect bone to bone.
This type of muscle is striated with multiple nuclei per cell. It is attached to bone.
This is the name of the neurotransmitter released by neurons that begins the process of contraction.
This type of muscle has no striations.
This type of muscle is only found in the heart.
This is what muscles release in response to acetylcholine.
This type of muscle is found in organs like the stomach, eyes, blood vessels, and digestive tract.
The humerus, femur and pelvis all belong to this skeleton.
During contraction, cross-bridges do this.
Bend, pulling actin & myosin together.
The type of joint found in your shoulder & hip.
Ball & Socket
During relaxation, neurons release this.
Name 4 steps of muscle contraction.
1. Brain sends motor impulse
2. Neuron releases acetylcholine.
3. Muscles release Ca++ ions.
4. Cross-bridges bend, pulling actin & myosin together.q