6.3

Question 1

Appendicular skeleton

Answer 1

Bones of the arms, legs, and pelvis

Question 2

Compact bone

Answer 2

Hard bone tissue on the outside of bones

Question 3

Cancellous bone

Answer 3

Spongy bone tissue on the inside of bones

Question 4

Subchondrial bone

Answer 4

Bone tissue at the ends of bones covered in cartilage

Question 5

Periosteum

Answer 5

Membrane covering bones and blood vessels

Question 6

Bone marrow

Answer 6

Fatty tissue on the inside of bones

Question 7

Ossification

Answer 7

Process of replacing cartilage with bone

Question 8

Osteoblasts

Answer 8

Cells that build new bone tissue

Question 9

Osteocytes

Answer 9

Osteoblasts that are trapped in the bone they’ve built

Question 10

Osteoclasts

Answer 10

Cells that break down bone tissue

Question 11

Osteopenia

Answer 11

Reduction of bone mass

Question 12

Osteoporosis

Answer 12

Severe reduction of bone mass; a disease characterized by low bone density and increased risk of fractures

Question 13

Joints

Answer 13

Place where two or more bones meet

Question 14

Fibrous joints

Answer 14

Type of joint held together with fibrous connective tissue and allowing little or no movement

Question 15

Cartilaginous joints

Answer 15

Type of joint held together with cartilage tissue and allowing a small amount of movement

Question 16

Synovial joints

Answer 16

Type of joint with a joint cavity between bones and allowing the most range of movement

Question 17

Hinge joints

Answer 17

Type of synovial joint that allows for flexion and extension

Question 18

Ball and socket joints

Answer 18

Type of synovial joint that allows for flexion and extension as well as rotation

Question 19

Gliding joints

Answer 19

Also called Planer joints, type of synovial joint that allows bones to move past one another but not rotate

Question 20

Condyloid joints

Answer 20

Type of synovial joint that allows for angular movement in two directions

Question 21

Saddle joint

Answer 21

Type of synovial joint that allows for angular movement in two directions with greater range of motion than condyloid joints

Question 22

Skeletal muscle

Answer 22

Striated muscle responsible for voluntary movement

Question 23

Smooth muscle

Answer 23

Involuntary muscle lining digestive tract and other organs

Question 24

Cardiac muscle

Answer 24

Involuntary muscle that makes the heart beat

Question 25

Contraction

Answer 25

Movement of muscle fibers

Question 26

Myofibril

Answer 26

Muscle fiber

Question 27

Sarcomere

Answer 27

Functional unit of the muscle

Question 28

Myosin

Answer 28

Protein filaments in thick muscle filaments responsible for muscle cell contraction

Question 29

Actin

Answer 29

Protein filaments in thin muscle filaments responsible for muscle cell contraction

Question 30

Acetylcholine

Answer 30

Neurotransmitter responsible for muscle contraction

Question 31

Sebaceous glands

Answer 31

Glands in the dermis that secrete sebum

Question 32

Hypodermis

Answer 32

Inner layer of skin consisting of connective tissue and fat