1)Q: What are the two main divisions of the skeletal system?
A: Axial skeleton and appendicular skeleton.
2)Q: How many bones are in the adult human body?
A: 206 bones.
3)Q: What is the function of ligaments?
A: Ligaments connect bones to other bones and stabilize joints.
4)Q: Name the three types of muscle tissue.
A: Skeletal, cardiac, and smooth muscle.
5)Q: What type of joint is the shoulder joint?
A: Ball-and-socket joint.
6)Q: What is the structural unit of compact bone?
A: Osteon (or Haversian system).
,7)Q: What type of bone is the femur classified as?
A: Long bone.
8)Q: What is the primary function of red bone marrow?
A: Production of red blood cells, white blood cells, and platelets.
9)Q: Which protein in muscle fibers is responsible for contraction?
A: Actin and myosin.
10)Q: What is the difference between tendons and ligaments?
A: Tendons attach muscles to bones; ligaments attach bones to bones.
11)Q: Which joint allows only rotational movement?
A: Pivot joint.
12)Q: What is the name of the connective tissue covering a bone?
A: Periosteum.
, 13)Q: Name the type of joint found between vertebrae.
A: Cartilaginous joint (intervertebral discs).
14)Q: Which muscle type is involuntary and non-striated?
A: Smooth muscle.
15)Q: What is osteoporosis?
A: A condition characterized by decreased bone density and increased fracture risk.
16)Q: Which muscle is the primary extensor of the forearm?
A: Triceps brachii.
17)Q: What is the role of synovial fluid?
A: Lubricates joints and reduces friction.
18)Q: Name the two main types of bone tissue.
A: Compact bone and spongy (cancellous) bone.