✓ Board-verified
Science · 2025 · 4 marks
CBSE 2025 · Region 3 · Set 1 · Q38
A person while climbing up a rocky hill comes into a panic state and fear. His body starts reacting in a "flight-or-flight" condition to adjust to…
A person while climbing up a rocky hill comes into a panic state and fear. His body starts reacting in a "flight-or-flight" condition to adjust to the dangerous and stressful situation. Based on the above facts, answer the questions that follow.
(a)(i)
Name the hormone secreted in the blood of the person in this situation.
OR
(a)
(ii)
Name the source gland of the hormone secreted in this condition.
(b)
State any two responses in the body of the person as a result of the secretion of this hormone.
(c)
How does the action of the chemical signal in terms of hormones differ from the electrical impulses via nerve cells ?
Marking-scheme solution
(a) (i) Adrenaline
Adrenal Gland
(b) Heart beat becomes faster to supply more oxygen to the muscles / blood supply to the digestive system is reduced / blood supply to the skin is reduced / blood is diverted to the skeletal muscles / breathing rate increases/increased contractions of diaphragm and rib muscles.
(c) Chemical signal - travel through bloodstream and reach a wide range of target cells across the body.
Electrical signal - travels through a nerve cell.
All Control and Coordination questions2025 question paperNCERT solutions: Control and CoordinationPractice Control and Coordination →
More from Control and Coordination
- Write the name and location of a hormone which helps a person to respond when chased by a dog. Mention the responses in the body which help him to…2024
- Assertion: In our actions of writing or talking, our nervous system communicates with the muscles. Reason (R): Cranial nerves and spinal nerves form…2025
- How is an electric impulse created in human nervous system? Identify the parts of a neuron which helps the nerve impulse to travel (i) towards the…2023
- (i) Define a reflex arc. Why have reflex arcs evolved in animals? Trace the sequence of events which occur, when you suddenly touch a hot object.…2024
- Identify an involuntary action from the following:2024
- Some plants like pea plants have tendrils which help them to climb up other plants. Explain how is it done. Name the plant hormone responsible for…2023
- How is brain protected in our body? A doctor finds in one of his patients that he is not maintaining a proper posture and balance of his body. State…2025
- Give reasons for the following: Adrenal gland is known as the stress gland of the body. Prenatal sex determination is banned in India. Vegetative…2026
CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.