Lakhmir Singh Manjit Kaur Class 5 Science 4th Chapter “Skeletal and Nervous System” solution

Lakhmir Singh and Manjit Kaur Science solution: “Skeletal and Nervous System” Chapter 4. Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 4 . Here we give Chapter 4 all solution of Class 5. Its help you to complete your homework.

Board – CBSE

Text Book – SCIENCE

Class – 5

Chapter – 04

Objective Type Questions

(1) Write True / False. Correct the Incorrect Statements.

(a) The images of objects are formed on the retina of our eyes.

Ans. True

(b) The vertebral column protects the delicate umbilical cord.

Ans. False (The vertebral column protects the spinal cord).

(c) The ligaments are the strong tissues that hold the bones together.

Ans. True

(d) The nerves that brings messages from the brain to the spinal cord are called motor nerves.

Ans. False (The nerves that brings messages from the brain to the spinal cord are called sensory nerves).

(e) The ribcage protects our brain.

Ans. False (The ribcage protects the heart and lungs).

(2) Write where do we find these joints in our body.

(a) The hinge joint _______

(b) The ball and socket joint _______

(c) The pivot joint _______

(d) The gliding joint _______

Ans. (a) Elbows, Knees, fingers and toes (b) Shoulders and hips (c) Neck (d) Wrist and ankle.

(3) Give one word answer for the following.

(a) A cage of bones around the chest _______

(b) A joint that allows back and forth movement _______

(c) Muscles in the heart _______

(d) The automatic response of our body _______

(e) The cord that connects the brain to the nerves _______

Ans. (a) Ribcage (b) Hinge Joint (c) Cardiac muscles (d) Reflex Action (e) Spinal Cord

(4) Match The following

(a) Pumps blood to the entire body (i) blood vessels
(b) Oesophagus (ii) important parts of excretory system
(c) Trachea (iii) forms the framework of the body
(d) Arteries, veins, capillaries (iv) muscles that are under our control
(e) Brain, Spinal cord, nerves (v) food pipe
(f) Voluntary muscles (vi) heart
(g) Skeletal system (vii) wind pipe
(h) Kidneys, ureter, urinary bladder, urethra (viii) forms the nervous system

Ans

(a) Pumps blood to the entire body (vi) heart
(b) Oesophagus (v) food pipe
(c) Trachea (vii) wind pipe
(d) Arteries, veins, capillaries (i) blood vessels
(e) Brain, Spinal cord, nerves (viii) forms the nervous system
(f) Voluntary muscles (iv) muscles that are under our control
(g) Skeletal system (iii) forms the framework of the body
(h) Kidneys, ureter, urinary bladder, urethra (ii) important parts of excretory system

Subjective Type Questions:

(7) Answer the following.

(a) What is the skeletal system? Write all the parts of the skeletal system.

Ans. An adult human being has 206 bones in the body which form the skeletal system of the body and give shape to the body.

Parts of the skeletal system: Skull, Vertebra, Sternum, Ribs, Radius, Ulna, Femur, Knee, Tibia, Fibula, Pelvis, Spine, Humerus, Ribcage, Shoulder.

(b) What are the different kinds of muscles and what are their function?

Ans. The different kinds of muscles are: Voluntary muscles, Involuntary muscles, Cardiac muscles.

Voluntary muscles: Our Arms, neck, shoulders and legs have voluntary muscles as they are under our control.

Involuntary muscles: Some muscles help in our breathing, movement of food in the stomach and intestines, and flow of blood.. They work on their own and so are called involuntary muscles.

Cardiac Muscle: The muscles of the heart are called cardiac muscles. They pump blood to all the parts of our body and are involuntary in nature.

(c) Differentiate between sensory nerve and motor nerve.

Ans.

Sensory nerve Motor nerve
(i) These nerves bring messages from the sense organs to the brain or the spinal cord. (ii) These nerves carry commands from the brain to the muscles of different organs.

(d) Differentiate between movable and immovable joints.

Ans. The difference between movable and immovable joints are following:

Movable Joints Im- Movable Joints
(i) The joints that help in the movement of our body are called movable joints. (i) The joints that can not be moved are called immovable joints.
(ii) Example: Arms, Legs. (ii) Ribcage and Breast bone.

(e) What are reflex actions?

Ans. Our body has some automatic response. For example if we touch a hot or sharp object or boiling water, we withdraw our hand immediately. These actions are instant and does not involve the brain and are called reflex actions.

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