Class 5 Science HOTS Questions - Nervous System

Clear all your Class 5 doubts with EduRev Join for Free

Join for Free

Q.1
​Situation: Sophia was walking barefoot on the beach when she suddenly stepped on a sharp seashell. Before realizing what had happened, she had already lifted her foot. Which type of nerve was responsible for carrying the pain signal to her spinal cord?

(a) Motor nerve
(b) Sensory nerve
(c) Mixed nerve
(d) Autonomic nerve

Ans: (b)
Sensory nerves carry signals from sensory receptors to the spinal cord or brain. In this case, Sophia's sensory nerves detected pain and transmitted the message to her spinal cord, triggering a reflex action before she even became aware of the injury.

Q.2 
Situation: Emma was reading a book in dim light for a long time. After a while, she started experiencing eye strain and discomfort. Which part of the eye is responsible for controlling the amount of light entering her eye?

(a) Retina
(b) Cornea
(c) Pupil
(d) Optic nerve

Ans: (c)

The pupil regulates the amount of light entering the eye by expanding or contracting based on brightness.

Q.3 
Situation: Jake accidentally touched a hot pan and immediately pulled his hand away before realizing what happened. Which part of the nervous system played the most crucial role in this quick response?

(a) Cerebrum
(b) Cerebellum
(c) Spinal cord
(d) Medulla oblongata

Ans: (c)

The spinal cord is responsible for reflex actions, which are automatic and occur without conscious thought.

Q.4 
Situation: A scientist is studying how different parts of the brain control human activities. She notices that one particular patient is having difficulty maintaining balance and coordinating movements. Which part of the brain is most likely affected?

(a) Cerebrum
(b) Cerebellum
(c) Medulla oblongata
(d) Spinal cord

Ans: (b)

The cerebellum is responsible for coordinating voluntary movements and maintaining balance.

Q.5 
Situation: Lisa loves eating chocolates and spicy food. Whenever she eats something sour, she immediately reacts by making a funny face. Which part of her body is responsible for detecting taste and sending signals to the brain?

(a) Nose
(b) Tongue
(c) Skin
(d) Spinal cord

Ans: (b)
The tongue contains taste buds that detect different flavors and send signals to the brain.

Q.6 
Situation: Noah was playing in the park when he saw a bright flash of lightning in the sky. Which part of his nervous system helped him process and understand what he saw?

(a) Cerebrum
(b) Cerebellum
(c) Medulla oblongata
(d) Spinal cord

Ans: (a)

The cerebrum is responsible for processing sensory information, including vision, and helps in understanding what is seen.

Q.7 
Situation: David accidentally touched a cold metal surface in winter and immediately withdrew his hand. Which type of receptor detected this temperature change?

(a) Pain receptors
(b) Thermoreceptors
(c) Mechanoreceptors
(d) Photoreceptors

Ans: (b)

Thermoreceptors detect temperature changes and send signals to the brain or spinal cord to respond accordingly.

Q.8 
Situation: Olivia was trying to balance on one foot while closing her eyes. She noticed that it was much harder to maintain balance without looking. Which part of her body plays a crucial role in helping her balance even without vision?

(a) Inner ear
(b) Cerebrum
(c) Optic nerve
(d) Medulla oblongata

Ans: (a)

The inner ear contains the vestibular system, which helps in maintaining balance and spatial orientation.

Q.9 
Situation: Ava was startled by a sudden loud noise and immediately turned her head towards it. Which part of her nervous system helped her react so quickly?

(a) Cerebrum
(b) Reflex arc
(c) Cerebellum
(d) Medulla oblongata

Ans: (b)
The reflex arc allows quick, automatic reactions to stimuli without conscious thought.

Q.10 
Situation: Mia was learning to play the piano. Which part of her brain helps her coordinate her finger movements and maintain rhythm?

(a) Cerebrum
(b) Cerebellum
(c) Medulla oblongata
(d) Spinal cord
Ans: (b)
The cerebellum helps in coordinating voluntary muscle movements and maintaining balance.