biology test 2 - musculoskeletal system

Question 1

Endoskeleton

Answer 1

Skeleton is inside the body

Question 2

Exoskeleton

Answer 2

Skeleton is outside the body

Question 3

Skeletal system

Answer 3

supports body, delicate organs, and enables movement.

Question 4

Bones

Answer 4

Are hard and dense. Consist of a mixture of materials primarily calcium and phosphorous as well as collagen fibers. Canals inside the bones contain nerves and blood vessels.

Question 5

Ligaments

Answer 5

Elastic connective tissue that holds bones together at each joint. Made up of collagen fibers.

Question 6

Cartilage

Answer 6

Dense connective tissue consists of cells in a matrix of collagen fibers. Provides a strong, flexible, low-friction support for bones and other tissues so movement is pain-free.

Question 7

Types of muscle

Answer 7

Skeletal muscle: Allows for voluntary movement in the limbs. Muscle is attached to the bone by tendons.

Smooth muscle: For involuntary movement of essential organs such as the digestive system.

Cardiac muscle: for involuntary movement of the heart.

Question 8

Muscle

Answer 8

Muscle tissue consists of bundles of long cells called muscle fibers that contain specialized proteins that cause muscles to contract when signaled by nerve cells. When proteins contract, muscles get shorter and thicker.

Question 9

Slow-twitch muscle fibers

Answer 9

Support long distance or endurance activities.

Question 10

Fast twitch muscle fibers

Answer 10

Support quick exertions of force, power, or speed.