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Class 6 Science Chapter 5 Important Question Answers - Body Movements

Q: 4. What are the different types of joints in the human body?

Ans. The human body has several types of joints, including:1. Hinge Joints: These joints allow movement in only one direction, like the knee and elbow joints.2. Ball-and-Socket Joints: These joints provide a wide range of motion in multiple directions, such as the hip and shoulder joints.3. Pivot Joints: These joints allow rotation around a central axis, like the joint between the first and second vertebrae in the neck.4. Gliding Joints: These joints allow bones to glide past each other, like the joints between the small bones in the wrists and ankles.

Very Short Answer Type Questions

Q1: What is the term for a change in the position of any object?
Ans: Movement.

Q2: Define locomotion.
Ans: Locomotion is movement resulting in a change of position of the whole organism.

Q3: Give an example of a fixed or immovable joint.
Ans: Joints in the skull bone (cranium).

Q4: What are the two types of movable joints?
Ans: Freely movable joints and partially movable joints.

Q5: Name the joint that allows movement in all directions, like the shoulder joint.
Ans: Ball and socket joint.

Q6: Which type of joint allows up and down, side to side movements, like the joint between the skull and vertebral column?
Ans: Pivot joint.

Q7: Explain the movement allowed by a hinge joint.
Ans: A hinge joint allows movement only in one plane and up to 180 degrees.

Q8: What type of joint allows the sliding of bones over one another?
Ans: Gliding joint.

Q9: What is the framework of bones and cartilage called that supports the body?
Ans: Skeleton.

Q10: How many bones make up the human skeleton?
Ans: 206 bones.

Short Answer Type Questions

Q11: Differentiate between fixed joints and movable joints.
Ans: Fixed joints do not allow any movement, while movable joints permit various types of movements. For example, the joints in the skull are fixed, while the shoulder joint is a movable joint.

Q12: Explain the structure and functions of the rib cage.
Ans: The rib cage is a cone-shaped bony structure formed by ribs. It protects the lungs and heart. There are 12 pairs of ribs attached to the vertebral column.

Q13: Describe the structure of the vertebral column and its function.
Ans: The vertebral column consists of 33 small rings called vertebrae, joined from end to end. It provides support to the body and protects the spinal cord.

Q14: What is the function of the shoulder bone or pectoral girdle?
Ans: The shoulder bone, formed by the collar bone and shoulder blade, is attached to the upper part of the rib cage and the upper arm bone. It provides support and mobility to the arms.

Q15: Explain how an earthworm moves and the role of bristles in locomotion.
Ans: An earthworm moves by contracting and expanding alternate portions of its body. Bristles on the ventral surface help it hold the ground during movement. When the anterior part contracts, it holds the ground, and the posterior part is dragged forward.

Long Answer Type Questions

Q16: Describe the types of joints in the human body and provide examples of each.
Ans: There are three types of joints: fixed joints (e.g., in the skull), movable joints (divided into freely movable and partially movable joints), and ball and socket joints (e.g., shoulder joint). Fixed joints do not allow any movement, while movable joints permit various types of movements.

Q17: Discuss the functions of the human skeleton and the importance of cartilage.
Ans: The skeleton provides support and shape to the body. It protects vital organs like the heart and lungs. Cartilage reduces friction between joints. It acts as a cushion and allows smooth movement between bones.

Q18: Explain the different methods of locomotion in animals, such as earthworms, snails, cockroaches, and birds.
Ans: Earthworms move by contracting and expanding their body segments. Snails have a muscular foot that helps them crawl. Cockroaches use their six legs for walking and running. Birds have wings and strong muscles that allow them to fly.

Q19: How do snakes move, and what anatomical features allow them to do so?
Ans: Snakes move by slithering, using their body muscles and scales. Their long, flexible vertebral column and lack of limbs enable them to move in a wave-like motion.

Q20: Discuss the methods of locomotion in fish and the adaptations that enable them to swim.
Ans: Fish swim by moving their body and fins in a side-to-side motion. The streamlined shape of their body reduces friction in water. Fins provide stability and control during swimming.

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FAQs on Class 6 Science Chapter 5 Important Question Answers - Body Movements

1. What are body movements?

Ans. Body movements refer to the various actions and motions that the human body can perform, such as walking, running, jumping, bending, stretching, etc. These movements are carried out by the skeletal system, muscles, and joints working together.

2. What are the types of body movements?

Ans. There are three main types of body movements: 1. Voluntary Movements: These are conscious movements that we control, such as raising an arm or kicking a ball. 2. Involuntary Movements: These are unconscious movements that occur without our control, such as the beating of the heart or the reflex actions. 3. Reflex Movements: These are quick and automatic responses to stimuli, such as pulling your hand away from a hot surface without thinking.

3. How do muscles help in body movements?

Ans. Muscles play a crucial role in body movements. They are responsible for contracting and relaxing, which allows movement to occur. When a muscle contracts, it pulls on the bones it is attached to, causing movement at the joint. Muscles work in pairs, with one muscle contracting while the other relaxes, enabling smooth and coordinated movements.

4. What are the different types of joints in the human body?

Ans. The human body has several types of joints, including: 1. Hinge Joints: These joints allow movement in only one direction, like the knee and elbow joints. 2. Ball-and-Socket Joints: These joints provide a wide range of motion in multiple directions, such as the hip and shoulder joints. 3. Pivot Joints: These joints allow rotation around a central axis, like the joint between the first and second vertebrae in the neck. 4. Gliding Joints: These joints allow bones to glide past each other, like the joints between the small bones in the wrists and ankles.

5. Why is maintaining good posture important for body movements?

Ans. Good posture is essential for efficient body movements. It helps maintain the correct alignment of the bones, muscles, and joints, reducing the strain on various body parts. It also improves balance, coordination, and overall physical performance. Additionally, maintaining good posture prevents the development of musculoskeletal problems and reduces the risk of injuries during physical activities.

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