First bio test

• What is the first level of organization in living organisms?

  Cells
• What is the role of tissues in the levels of organization?

  Tissues are multiple cells working together.
• What defines an organ in the levels of organization?

  An organ is a group of different tissues that work together to perform a certain function.
• What is an example of an organ system?

  The digestive system.
• What is the function of the nervous system?

  The nervous system helps coordinate the body's activities.
• What are the main components of the respiratory system?

  Lungs
• What is the role of the skeletal system?

  The skeletal system keeps us standing and provides structure.
• What does the circulatory system consist of?

  Heart, blood vessels, arteries, veins, and capillaries.
• What is the function of the diaphragm during inhalation?

  The diaphragm moves downwards, increasing the volume of the thoracic cavity.
• What is the maximum movement allowed by a hinge joint?

  180°
• What is a joint?

  A joint is where two or more bones meet to allow movement.
• What is the composition of bones?

  Bones are made up of collagen and calcium phosphate.
• What is the role of cartilage at the end of a bone?

  Cartilage provides a soft tissue that cushions the joint.
• What is the function of ligaments?

  Ligaments connect bone to bone.
• What is the function of tendons?


  Tendons connect muscle to bone.
• What are the main types of joints and their movements?

  • Pivot joint: allows 360° movement.
  • Hinge joint: allows movement in one direction (180°).
  • Ball and socket joint: allows 360° movement.
  • Cartilage: reduces friction between bones.
• What is the role of muscles in the body?

  Muscles produce energy and facilitate movement.
• What is the function of the biceps muscle?

  The biceps flexes the arm.
• What is the function of the triceps muscle?

  The triceps extends the arm.
• What is the function of the quadriceps muscle?

  The quadriceps extends the lower leg.
• What is the function of the abdominal muscles?

  The abdominal muscles move the torso and assist in breathing.
• What is the significance of mitochondria in muscles?

  Mitochondria produce energy for muscle contractions.
• What is the role of the rib cage?

  The rib cage protects the heart and lungs.
• How do bones change throughout life?

  Bones undergo changes in density and structure as a person ages.
• What is the function of synovial fluid?

  Synovial fluid lubricates joints to reduce friction.
• What is the importance of calcium in bones?

  Calcium is important for bone strength and structure.
• What is the role of collagen in bones?

  Collagen provides flexibility and strength to bones.
• What is the primary function of the skeletal system?

  The skeletal system provides structure and support to the body.
• How do muscles contribute to movement?

  Muscles contract and relax to produce movement at joints.
• How do the functions of ligaments and tendons differ?

  Ligaments connect bone to bone, while tendons connect muscle to bone.
• What is the significance of the rib cage in the human body?

  The rib cage protects vital organs such as the heart and lungs.
• What is the role of the skeletal system in posture?

  The skeletal system provides the framework that supports the body and maintains posture.
• How do muscles and bones work together?

  Muscles contract to pull on bones, facilitating movement at joints.
• What are the differences between the various types of joints in the body?

  Different joints allow for different ranges of motion, such as 360° in ball and socket joints and limited movement in hinge joints.