Connective Tissue Coverings
The ______ extends inward from the epimysium; it surrounds bundles of skeletal muscle fibers within each muscle.
What is the perimysium?
What is a muscle fiber?
Myofibrils are made up of many units of these, joined end to end.
What are sarcomeres?
In the center of the H zone, consists of proteins that hold the myosin filaments in place.
What is the M Line?
According to this, during muscle contraction, a myosin head attaches to a binding site on the actin filament, forming a cross-bridge.
What is the sliding filament model of muscle contraction?
The fascia blends with this, the layer of connective tissue around each skeletal muscle.
What is epimysium?
The sarcoplasm contains parallel ____, which are active in muscle contraction.
What are myofibrils?
There are two other proteins besides actin used in thin filaments. Name at least one.
What is troponin/ tropomyosin?
In the center of the A band, this consists of myosin filaments only (thick).
What is the H zone?
The cytoplasm of the distal end of the motor neuron contains numerous _____ and _____ storing neurotransmitters
What are mitochondria and synaptic vessels?
Sometimes muscles are connected to each other by these broad sheets.
What are aponeuroses?
This is the cytoplasm of a muscle cell.
What is the sarcoplasm?
This protein is the most common protein that makes up thin filaments in myofibrils.
What is actin?
These bands are made up of overlapping thick and thin filaments.
What are A bands?
A synapse between a motor neuron and a muscle fiber that it regulates is called this.
What is a neuromuscular junction?
This connective tissue extends beyond the ends of the muscle, and gives rise to ____ that are fused to the periosteum of bones.
What are tendons?
This is the cell membrane of a muscle cell.
What is the sarcolemma?
This protein makes up the thick filaments in myofibrils.
What is myosin?
These bands are made up of actin filaments.
What are I Bands?
Each skeletal muscle fiber is functionally connected to the axon of a motor neuron, which creates this.
What is a synapse?
Layers of dense connective tissues that surround and separate each muscle.
What is fascia?
Each muscle cell (fiber) is covered by this layer of connective tissue.
What is endomysium?
The organization of thick and thin filaments produces these bands.
What are striations?
A sarcomere extends from one ____ to the next. Hint: it ends in "Line"
What is a Z line?
Skeletal muscles contract only when stimulate by this.
What is a motor neuron?