✓ Board-verified↻ asked 2×
Science · 2023 · 3 marks
CBSE 2023 · Region 6 · Set 1 · Q29
Name the gland and the hormone secreted by it in scary situations in human beings. List any two responses shown by our body when this hormone is secreted into the blood.In the given diagram(i)Name the parts labelled A, B, and C.(ii)Write the functions of A and C.(iii)Reflex arcs have evolved in animals ? Why ?
Name the gland and the hormone secreted by it in scary situations in human beings. List any two responses shown by our body when this hormone is secreted into the blood.
In the given diagram
(i)
Name the parts labelled A, B, and C.
(ii)
Write the functions of A and C.
(iii)
Reflex arcs have evolved in animals ? Why ?
Marking-scheme solution
(a) •Adrenal gland ; Adrenaline hormone
Response-
Breathing rate increases
Blood supply diverted to skeletal muscles.
(i) A - Sensory neuron B -Relay Neuron
C - Effector organ/Muscle
(ii) A- Carries impulse from receptor to spinal cord C- Responds to stimulus
(iii) The thinking process of the brain is not fast enough / Reflex arcs are more efficient in functioning in the absence of true thought processes
More from Control and Coordination
- Assertion: In our actions of writing or talking, our nervous system communicates with the muscles. Reason…2025 · asked 3×
- (i) Define a reflex arc. Why have reflex arcs evolved in animals? Trace the sequence of events which occur,…2024 · asked 3×
- How is brain protected in our body? A doctor finds in one of his patients that he is not maintaining a proper…2025 · asked 3×
- The plant hormone whose concentration stimulates the cells to grow longer on the side of the shoot which is…2025 · asked 3×
- Select from the following the correct statement about tropic movement in plants:2023 · asked 3×
- A person while climbing up a rocky hill comes into a panic state and fear. His body starts reacting in a…2025 · asked 3×
- Sense organ in which olfactory receptors are present is:2024 · asked 3×
- The growth movements of plant parts in which the direction of the stimulus determines the direction of the…2025 · asked 3×
CBSE Class 10 Science past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.