Muscular System

Question 1

Muscular System Function

Answer 1

Responsible for all types of body movement. Provides support, stabilizes joints, generates heat.

Question 1

Muscle fibers

Answer 1

Specialized cells that make up muscles. Contract to facilitate body movement

Question 2

Cardiac Muscle

Answer 2

Striated muscle cells, short and branched. contraction of this muscle cell is involuntary. walls of the heat. Controlled by autonomic nervous system

Question 3

Skeletal Muscle

Answer 3

Striated, long, cylindrical. Attached to bones in the body, skeletal muscle contracts voluntarily.

Question 4

Smooth muscle

Answer 4

Non-Striated, Spindle-shaped. Found in walls of internal organs like stomach and bladder. Involuntary movement controlled by autonomic nervous system

Question 5

Endomysium

Answer 5

encases individual skeletal muscle fibers

Question 6

Perimysium

Answer 6

connective tissue that bundles endomysium together

Question 7

Fasciculi

Answer 7

bundles of skeletal muscle fibers

Question 8

Empimysium

Answer 8

bundles together fasciculi

Question 9

Sarcolemma

Answer 9

Cell membrane that surrounds a skeletal muscle fiber

Question 10

Sarcoplasm

Answer 10

cytoplasm of the skeletal muscle fiber

Question 11

Myofibrils

Answer 11

Long cylindrical proteins that make up a muscle fiber

Question 12

Myo filaments

Answer 12

make up a myofibril

Question 13

Myosin

Answer 13

Myofilaments are made of several protein molecules called

Question 14

Muscle Contraction

Answer 14

ATP causes a myosin head to move towards the actin and create a cross bridge.

Question 15

Ligaments

Answer 15

Attach bones to bones

Question 16

Joints

Answer 16

Where individual bones meet together

Question 17

Immovable Joint

Answer 17

Fibrous joints, bones held together by connective tissues. Very close in contact. intersection of cranial bones in the skull

Question 18

Partly Movable

Answer 18

Cartilaginous Joints, Bones held together by cartilage. Allow some degree of movement. Vertebral discs in spine.

Question 19

Synovial

Answer 19

Allows the largest freedom of movement because the bones are separated by a joint cavity. Hip and shoulder.

Question 20

Tendons

Answer 20

Attach muscle to bone

Question 21

Flexor Muscle

Answer 21

Cause a joint to bend

Question 22

Extension Muscle

Answer 22

When this muscle contracts it causes a joint to straighten