Muscle

Types and Attachments

100

The attachment of a muscle that moves with contraction

Insertion

200

This type of muscle is striated and voluntary

skeletal muscle

300

This type of muscle forms the walls of blood vessels and hollow organs

smooth muscle

400

This type of muscle is involuntary and striated

cardiac muscle

500

This type of muscle moves the skeleton

Skeletal muscle

Parts of a muscle

100

Bundles of muscle cells within a muscle are called

fasicles

200

Muscle cells are made up of __________

myofibrils

300

Myofibrils are made up of ____________

myofilaments

400

Myofilaments include the _____________ filament made up of __________ and the _____________ filament made up of (3) ____________________

thick; myosin

thin; actin, troponin, tropomyosin

500

Bundles of ______________ make up a fasicle

muscle cells

Neuromuscular Junction

100

A nerve signals to skeletal muscle using ____________.

ACh

200

ACh from the nerve will open ____________ channels on the muscle cell, which can generate an ______________ on the muscle cell.

ligand gated; action potential

300

The action potential on the muscle cell sarcolemma can travel down the ________________ causing the release of _______________.

T-tubule; calcium

400

Once released from the ___________________, calcium will bind with _______________.

sarcoplasmic reticulum/terminal cisternae; troponin

500

When calcium binds with _____________ it will change shape and pull __________________ off the binding sites so the filaments can form a connection.

troponin; tropomyosin

Parts of a Muscle Cell

100

Plasma membrane of a muscle cell

Sarcolemma

200

Stores calcium in a muscle cell (2)

Sarcoplasmic reticulum and terminal cisternae

300

An extension of the muscle cell plasma membrane that runs deep inside the cell

T-tubule

400

The cytoplasm of the muscle cell

Sarcoplasm

500

A traid is made up of one ________________ and two ___________________.

Transverse tubule (T-tubule); terminal cisternae

Smooth Muscle and Cardiac Muscle

100

In smooth muscle calcium binds with __________

Calmodulin

200

Cardiac muscle is autorhythmic and has cyclical depolarizations called __________________.

pacemaker potentials

300

In smooth muscle the calcium calmodulin complex activates ______________

myosin light chain kinase

400

Smooth muscle is more ___________ than skeletal muscle meaning it uses less _________

efficient; ATP

500

Cardiac muscle cells are connected by special junctions called _______________

intercalated discs