Class 5 Nervous System Questions and Answers | Brain, Sense Organs & Reflex Action.
Class 5 Nervous System Questions and Answers with MCQs, fill in the blanks, true/false, long and short answer questions, worksheets, revision notes, and reflex action explained in simple language.
Multiple Choice Questions
- Which organ controls all the functions of the body?
Answer: Brain
- Which is the largest part of the brain?
Answer: (c) Cerebrum
- Reflex actions are controlled by ______.
Answer: (b) Spinal cord
- The nerve that carries a message from a body part to the brain is called ______ nerve.
Answer: (a) Sensory
- In eye, there is a transparent front covering called ______.
Answer: (d) Cornea
Fill in the Blanks
- The nerves that carry messages from the brain to the body muscles are called ______.
Answer: motor nerves
- The part of the eye on which an image is formed is called ______.
Answer: retina
- Playing, running and swimming are controlled by ______.
Answer: cerebellum
- ______ is the part of the brain that helps in thinking.
Answer: cerebrum
- Moving hand away from a hot object at once is a ______.
Answer: reflex action
True or False
- The medulla is the largest part of the brain.
Answer: False
- Motor nerves carry the order from the brain and spinal cord to the muscles and glands.
Answer: True
- Sensory nerves carry messages from the body parts to the brain and spinal cord.
Answer: True
- The skull protects the brain.
Answer: True
- Cerebellum lies in front of the cerebrum.
Answer: False
Match the Following
Cerebrum → Largest part of brain
Spinal cord → Thick bundle of nerves
Neurons → Specialised nerve cells
Optic nerve → Connects eye and brain
Ears → Sense organ of hearing
Let’s Think and Answer
- Which part of the brain controls thinking and talking?
Answer: The cerebrum controls thinking, talking, learning and memory.
- What is the function of the cerebellum?
Answer: It controls balance and coordination of muscles.
- What is the function of the medulla?
Answer: It controls involuntary actions like breathing, heartbeat, swallowing and digestion.
- What is the difference between a motor nerve and a sensory nerve?
Answer: Motor nerves carry messages from the brain/spinal cord to muscles and glands. Sensory nerves carry messages from sense organs/body parts to the brain and spinal cord.
- What is the nervous system made of?
Answer: The brain, spinal cord and nerves.
Long Answer Questions
- Describe various parts of the brain and their functions.
Answer: Cerebrum: thinking, memory, learning and control of sense organs.
Cerebellum: balance and coordination.
Medulla oblongata: controls involuntary actions like breathing and heartbeat.
- How are mixed nerves different from sensory and motor nerves?
Answer: Sensory nerves carry messages to the brain. Motor nerves carry messages from the brain to muscles. Mixed nerves perform both functions.
- Write a note on reflex action.
Answer: A reflex action is a quick automatic response to a stimulus controlled mainly by the spinal cord.
- Describe the structure of the eye.
Answer: The eye has cornea, iris, pupil, lens, retina and optic nerve. Light enters through the cornea and pupil, the lens focuses it on the retina, and the optic nerve carries messages to the brain.
- How does brain convey messages to different body parts?
Answer: The brain sends messages through the spinal cord and nerves to different body parts.
- How do eyes work?
Answer: Light enters the eye through the cornea and pupil. The lens focuses the image on the retina. The optic nerve sends signals to the brain, which helps us see.
HOTS
- Why can we see after sitting in a dark movie hall for some time?
Answer: Our eyes adjust to the darkness as the pupils become larger, allowing more light to enter.
- Why do we not feel pain when we cut our hair or extended nails?
Answer: Hair and the outer part of nails do not contain nerve endings, so cutting them does not cause pain.