Anatomy Ch. 7
Terms
undefined, object
copy deck
- What connects bone to bone?
- Ligaments
- What connects muscle to bone?
- tendons
- Name the 3 types of muscles
- Skeletal, Smooth & Cardiac
- Smooth Muscle is...
- Involuntary, slowly fatigue & found in the circulatory, digestive and respiratory systems
- Cardiac Muscle...
- Involuntary, found in only the heart and never fatigues
- Skeletal Muscle...
- Voluntary, looks strained, attached to skeleton and fatigues
- Two movements of skeletal muscles
- Contraction (shorten) Extension (lengthen)
- What is a fracture?
- break in the bone that will heal 100%
- What are different types of fractures?
- closed, open, multiple, comminuted, greenstick and spiral
- What is a sprain?
- a torn ligament or tendon that never fully heals
- What is a dislocation?
- when the bone gets forced out of joint
- What are the functions of the Muscular System?
- -Movement -Maintains Posture -Stabilizes joints -Generates heat
- Muscle Cells...
- -Fibers -Contain: Actin & Myoson -Exciteable
- Structure of Striated muscles...
- -Cylindrical -Varied in length -surrounded by dense fibrous connective sheaths
- What does the endomysium surround?
- Fibers
- What does the perimysium surround?
- bundles of fibers (facicles)
- What does the epimysium surround?
- all fascicles
- Origin of skeletal muscle?
- Stationary Bone
- Insertion of skeletal muscle?
- moveable bone
- Types of Myofilaments.
- Actin (thin) Myosin (thick)
- What is myoglobin?
- a type of pigment with iron
- What is Acetylcholine?
- a neurotransmitter in the nervous system
- What causes muscle fatigue?
- -ATP Depletion -Lactic Acid Buildup -Lack of oxygen
- What is Tetonic Contraction?
- Sustained contraction
- What is the Sliding Filament Theory?
- the process of muscles to contract
- Muscles contract with...
- Calcium Ion/Threshold Stimulus
- What is a latent period?
- period between contractions
- What is All or None?
- when stimulated, a muscle fiber will contract fully or not at all
- What is extention?
- increasing the angle between two bones at a joint
- What is flexion?
- act of bending; decreasing the angle between two bones at the joint
- What is hypertrophy?
- increased size of a part caused by an increase in the size of its cells
- What is isometric?
- type of muscle contraction in which muscle does not shorten
- What is a motor neuron?
- transmits nerve impulses from the brain and spinal cord to muscles and glandular epithelial tissues
- What is a sarcomere?
- contractile unit of muscle; length of myofibril between 2 Z bands
- What is tonic contraction?
- special type of skeletal contraction used to maintain posture