MUSCLE TISSUE TYPES
This type of muscle tissue is attached to bones and is primarily responsible for voluntary movement.
What is skeletal muscle?
This connective tissue surrounds an entire skeletal muscle.
What is the epimysium?
This neurotransmitter is released by a motor neuron at the neuromuscular junction.
What is acetylcholine (ACh)?
This is the thin myofilament.
What is actin?
This is formed when the myosin head attaches to an exposed binding site on actin.
What is a cross-bridge?
This muscle tissue is found in the walls of hollow organs such as the stomach and intestines and is controlled involuntarily.
What is smooth muscle?
This connective tissue surrounds a bundle of muscle fibers called a fascicle.
What is the perimysium?
This structure is on the muscle fiber's plasma membrane and receives the neurotransmitter.
What is a receptor?
This is the thick myofilament.
What is myosin?
This molecule must bind to myosin in order for the myosin head to detach from actin.
What is ATP?
This muscle tissue has striations and is involuntary.
What is cardiac muscle?
This connective tissue surrounds an individual muscle fiber.
What is the endomysium?
After acetylcholine binds to receptors on the sarcolemma, this passes to the muscle fiber.
What is an action potential?
This protein covers the binding sites on actin when a skeletal muscle is at rest.
What is tropomyosin?
During the power stroke, the myosin head pivots and pulls this protein toward the center of the sarcomere.
What is actin?
A muscle cell has multiple nuclei located around its periphery and obvious striations. Identify the tissue type and explain how its structure supports its function.
What is skeletal muscle? Its long, multinucleated fibers and organized sarcomeres allow powerful, coordinated contractions.
Put these structures in order from largest to smallest: muscle fiber, myofilament, fascicle, myofibril, whole muscle.
Whole muscle → fascicle → muscle fiber → myofibril → myofilament
This structure allows the action potential to travel to the deepest part of the muscle fiber.
What is the T-tubule?
Calcium binds to this regulatory protein, causing a change that exposes myosin-binding sites on actin.
What is troponin?
Arrange these events in the correct order:
myosin binds actin → power stroke --> ATP binds to myosin --> Myosin detaches
This muscle is found in blood vessels.
What is smooth muscle?
This is the plasma membrane of muscle fibers.
What is the sarcolemma?
This is release from the sarcoplasmic reticulum when its stimulated by the action potential.
What is Calcium?
It is needed in order for contraction to happen.
What is Calcium?
What is the condition when the body stops producing ATP and what is the result?
Rigor mortis - body in sustained/continuous contraction