Understanding Kinesiology and Human Movement Mechanics Quiz

Kinesiology is the study of muscular movement.

Kinesiology focuses on the anatomic and biomechanical interactions within the cardiovascular system.

Anatomy is the science of the shape and structure of the human body and its parts.

Biomechanics uses principles of chemistry to study how forces interact with the living body.

Physiology is the biologic study of living organisms.

Kinematics describes the motion of a body without considering the forces or torques that may produce the motion.

Translation is a rotational motion in which all parts of a rigid body move parallel to and in the same direction as every other part.

Kinesiology primarily borrows from the sciences of chemistry, physics, and biology.

Co-contraction occurs when the agonist and the antagonist muscles contract simultaneously.

A neutralizer muscle group helps execute a movement by contracting with the agonist.

The Gluteus Maximus is considered a neutralizer muscle for hip flexion.

Core muscles are primarily responsible for providing stability.

Muscular Force Couple occurs when muscles produce forces in different linear directions resulting in torques acting in opposite rotary directions.

In a lever system, opposing torques can balance each other only if the opposing forces are of equal magnitudes.

The Iliopsoas is considered an antagonist for hip extension.

Hamstrings are synergists for hip extension.

Muscle fibers can range in thickness from about 10 to 100 mm.

Each muscle fiber is surrounded by the epimysium.

Myofilaments are the basic components of muscle from the muscle belly to the individual contractile proteins.

Each myofibril within the muscle fibers contains many myosin filaments.

The fundamental unit within each muscle fiber is known as the sarcophagus.

Shortening of each sarcomere generates lengthening of the muscle fiber.

Actin and myosin are examples of noncontractile proteins in muscle.

Perimysium surrounds individual fascicles within a muscle.

Stress is defined as the internal resistance generated as a tissue resists its deformation.

Strain is the ratio of stress caused by an applied strain in the ligament.

Plasticity is the property of a material to return to its original length after the removal of a deforming force.

Yield point is reached when increased strain results in only marginal increased stress.

Elasticity is the ability of a material to tolerate tension loads.

The ability of connective tissue to partially resist changes in shape can be represented by a Stress-Strain Curve.

Stiffness is the ratio of strain caused by an applied stress in the ligament.

Injured or weakened musculoskeletal tissues may resist external loads adequately.

Active force is produced by an activated muscle fiber being stimulated by the skeletal system to contract.

Muscle contraction involves a simple physiologic and mechanical interaction between actin and myosin.

The A band within a sarcomere contains actin thin filaments.

The I bands, also called light bands, contain myosin thick filaments.

The shortening of many sarcomeres in unison creates movement.

The sliding filament hypothesis describes how actin filaments slide past myosin filaments during muscle contraction.

The H band widens as actin and myosin filaments overlap during muscle contraction.

The Z discs within a sarcomere move further apart during muscle contraction.

Muscle fibers are the smallest functional subunits of the myofibril.

Passive tension generated in muscles is not transmitted to the bones of a joint.