Bones and Skeleton
How many bones are normally found in the adult human skeleton?
206
What is the hard, dense tissue forming the outer portion of bones?
Compact Bone
What is another name for a joint?
What is an articulation?
What are the three types of muscle tissue?
Skeletal, Smooth, and Cardiac Muscle
What molecule provides usable energy for muscle contraction?
ATP
What division includes the skull, vertebral column, ribs, and sternum?
Axial Skeleton
What type of bone tissue contains many spaces and is lighter than compact bone?
Spongy Bone
What type of joint allows the greatest amount of movement?
Synovial Joint
Which muscle type is generally under voluntary control?
Skeletal Muscle
What mineral ion is essential for initiating skeletal muscle contraction?
What is the longest and strongest bone of the body?
Femur
What cells build new bone?
Osteoblasts
The elbow and knee primarily demonstrate what type of joint?
Hinge Joint
What type of muscle is found in the walls of hollow organs such as the intestines?
Smooth Muscle
What two major proteins interact during muscle contraction?
Actin and Myosin
What bone is commonly called the shoulder blade
What cells break down bone during bone remodeling?
Osteoclasts
The shoulder and hip are examples of what type of joint?
Ball and Socket Joint
What muscle tissue makes up the myocardium?
Cardiac Muscle
What theory explains muscle contraction as thin filaments sliding past thick filaments?
Sliding Filament Mechanism
What two bones make up the lower leg?
Tibia and Fibula
What is the process of bone formation called?
Ossification
Movement that decreases the angle between two bones is called what?
Flexion
What term describes an increase in muscle size caused by increased workload?
Hypertrophy
What neurotransmitter is released at the neuromuscular junction to stimulate skeletal muscle?
Acetylcholine