A protein that, with actin, contracts and relaxes muscle fibers. thicker, occupy the end of the sarcomere

The process in which a muscle becomes or is made shorter and tighter.

Any of the elongated contractile threads found in striated muscle cells.

The boundaries of a muscle sarcomere.

A protein that is important in the contraction of striated muscle tissues. elastic, acts like a molecular spring 1. holds myosin in correct position 2. prevents overstretching of sarcomere 3. adds the force of contraction by releasing energy as it recoils

Muscles that oppose the action of another. Example: bicep and triceps

The process of a muscle returning to its original state after contraction.

A nerve cell forming part of a pathway along which impulses pass from the brain or spinal cord to a muscle or gland.

The cells or basic building block of the muscle.

Neuromuscular junctions

The synapse or junction of the axon terminal of a motor neuron with the motor end plate.

A neurotransmitter that is involved in the transmission of nerve impulses. Its main role is to stimulate muscle contraction by: Binding to receptors on the muscle cell membrane (sarcolemma), Triggering depolarization , which leads to an action potential in the muscle fiber.

Coordinated contraction

The synchronized contraction of muscle fibers.

The hard internal framework that supports and protects an animal's body.

A rigid external covering for the body in some invertebrate animals.

An internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

a rigid structure (usually a bone) that moves around a pivot point (a joint) when a force (from a muscle) is applied. In the body, bones act as levers , joints act as fulcrums , and muscles apply the force to move a load (e.g. a limb or object).

The point where a muscle is attached to a bone that remains stationary during contraction.

The place where the fixed end of a muscle attaches.

In the human body, the fulcrum is a joint (e.g. elbow, knee, shoulder). It allows the bone (lever) to move when a muscle (effort) contracts and acts on the load .

A flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.

A structure in the human or animal body at which two parts of the skeleton are fitted together.

Joints that do not move. Example: Skull sutures (e.g. cranium)

A type of joint that is surrounded by a flexible, lubricated capsule. Ball and Socket- Movement in all directions (Shoulder, hip) Hinge- Movement in one plane (Elbow, knee) Pivot- Rotation around a single axis (Neck, forearm (radius/ulna) Saddle- Back-and-forth and side-to-side (thumb joint)

Rigid organs that constitute part of the endoskeleton of vertebrates.

A firm, flexible connective tissue found in various forms in the larynx and respiratory tract, among other places.

A viscous fluid found in the cavities of synovial joints.

A short band of tough, flexible fibrous connective tissue that connects two bones or cartilages or holds together a joint.

Tissues in the body that have the ability to contract, producing movement or maintaining the position of parts of the body.

The bone of the thigh or upper hind limb, articulating at the hip and the knee.

The large bony structure near the base of the spine to which the hind limbs or legs are attached in humans and many other vertebrates.

The full movement potential of a joint, usually its range of flexion and extension.

An instrument that measures the angle of a joint's range of motion.

Ligamentous joint capsule

A sac enclosing a joint, formed by an outer fibrous layer and an inner synovial membrane.

Joints that allow movement in one plane, like the knee or elbow.

The action of bending or the condition of being bent, especially the bending of a limb or joint.

The action of moving a limb from a bent to a straight position.

Ball-and-socket joint

A joint in which a ball moves within a socket, allowing rotary motion in every direction within certain limits.

The movement of a limb or other part away from the midline of the body.

The movement of a limb or other part toward the midline of the body.

Muscles situated between the ribs.

The bony frame formed by the ribs around the chest.

The energy held by an object because of its position relative to other objects.

Designing or providing with a form that presents very little resistance to a flow of air or water, increasing speed and ease of movement.

B3.3 Muscle and motility Flashcards

Student preview

55 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Motile

Back

Capable of movement.

Example: birds, fish, mammals

2.

FLASHCARD QUESTION

Front

Sessile

Back

Fixed in one place; immobile.

Example: corals, barnacles, plants

3.

FLASHCARD QUESTION

Front

Movement

Back

The act of changing physical location or position.

4.

FLASHCARD QUESTION

Front

Locomotion

Back

The ability to move from one place to another.

5.

FLASHCARD QUESTION

Front

Filter-feeding

Back

A method of feeding where small particles are filtered from water.

6.

FLASHCARD QUESTION

Front

Sarcomere

Back

The basic unit of a muscle's cross-striated myofibril.

7.

FLASHCARD QUESTION

Front

Actin

Back

A protein that forms (together with myosin) the contractile filaments of muscle cells.

attached to the z-disc

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