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Set 21 - Organ Systems - The Muscular and Skeletal Systems

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celine's version from 2018-03-22 14:53

Section

Question Answer
The muscular and skeletal systems function in _________, as well as in _________ and _________.locomotion, gas exchange and digestion
Mammalian muscle tissues are divided into three types:Skeletal muscle, Smooth muscle, and Cardiac muscle
Skeletal muscle is found beneath the_________and attached to bone. _________ contractions of skeletal muscles allow movement. Skeletal muscle has _________ due to the arrangement of muscle fibers.skin, Voluntary, striations (stripes)
Smooth muscle lines the _________, _________, and _________. It lacks _________ and is _________ under voluntary control.bladder, digestive tract, and arteries, striations, not
Cardiac muscle is found in the _________. It shares characteristics of both _________ and _________ muscle.heart, smooth and skeletal muscle
Muscle fibers are long, thin, multinucleated cells packed together to make up _________.muscle tissue
Each muscle fiber contains long strands made up of the proteins _________ and _________.actin and myosin
Actin and myosin filaments are arranged in units called _________, and they partially overlap. When a muscle fiber is stimulated, the region of overlap increases, causing the fibers to contract. This is the _________ of muscle contraction.sarcomeres, sliding-filament model
_________ attach muscles to the bones of the skeleton. Because muscles can only voluntarily contract but cannot extend, they often work in opposing pairs. As one muscle contracts, the opposing muscle is extended, and the limb moves toward the contracting muscle. To move the limb in the opposite direction, the opposing muscle must contract.Tendons
_________ between bones allow for a range of motion.Joints
_________ allow for the rotation of limbs. They occur where the upper arm bone attaches to the shoulder and where the upper thigh bone attaches to the hip.Ball-and-socket joints
_________ allow swinging motion in one dimension. Hinge joints can be found at the elbows and the knees.Hinge joints
_________ allow rotational motion in one dimension. They can be found at the elbows and neck.Pivot joints
_________ allow movement in two planes. They are found in the hands, feet, wrists, and ankles.Saddle and condyloid joints
Contraction of opposing muscle pairs also occurs in organisms with exoskeletons (for example, arthropods). Animals that lack a skeleton (for example, annelids) may use a _________(fluid in a closed sac). Pressure applied to one part of the sac is distributed throughout the fluid, affecting other regions of the sac. For example, an earthworm contracts segments of its body, elongating other segments and thus moving forward.hydrostatic skeleton
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