Joint types
These joints connect bones using cartilage.
What are cartilaginous joints?
This protein forms the thin myofilaments.
What is actin?
This connective tissue surrounds each individual muscle fiber.
What is the endomysium?
This is the small space between a neuron and a muscle fiber.
What is the synaptic cleft?
This is the stage when a muscle cell returns to its normal −70 mV electrical state and is ready to receive another signal. The stage is always negative.
What is resting potential?
These joints have a joint cavity and allow lots of movement.
What are synovial joints?
This protein forms the thick myofilaments.
What is myosin?
This connective tissue surrounds a fascicle.
What is the perimysium?
This neurotransmitter is released by a neuron to signal a muscle to contract.
What is acetylcholine (ACh)?
This ion moves into the cell during depolarization.
What is sodium (Na⁺)?
These joints connect bones using dense connective tissue.
What are fibrous joints?
These structures contain many sarcomeres arranged in a row.
What are myofibrils?
This connective tissue surrounds the entire muscle.
What is the epimysium?
This is the location where a motor neuron communicates with a muscle fiber.
What is the neuromuscular junction?
This ion moves out of the cell during repolarization.
What is potassium (K⁺)?
This type of synovial joint allows flexion and extension, like the elbow. It moves back and forth like opening and closing a door.
What is a hinge joint?
This region of the sarcomere contains only thick myosin filaments.
What is the H zone?
This is a bundle of muscle fibers.
What is a fascicle?
These chemical messengers are released by neurons to communicate with muscle cells and initiate movement.
What are neurotransmitters?
This ion is released from the sarcoplasmic reticulum to help muscles contract.
What is calcium (Ca²⁺)?
This type of synovial joint allows gliding movements between bones, such as the intercarpal joints of the wrist. It allows bones to slide/glide past eachother.
What is a plane joint?
This structure stores calcium, which is released to help a muscle contract.
What is the sarcoplasmic reticulum (SR)?
This structure connects muscle to bone.
What is a tendon?
This consists of one motor neuron and all the muscle fibers it controls.
What is a motor unit?
This electrical signal occurs in a muscle cell after it receives a neurotransmitter and triggers the process leading to muscle contraction.
What is an action potential?