In which animal nerve cell is present but brain is absent
- Sponge
- Earthworm
- Cockroach
- Hydra
The Correct Option is D
Solution and Explanation
Top Questions on nervous system
- Study the following and pick up the correct combinations: \begin{center} \begin{tabular}{|c|l|l|l|} \hline S.No. & Organ & Sympathetic Nervous System & Parasympathetic Nervous System
\hline I) & Eyes & Pupil constricts & Pupil dilates
\hline II) & Blood vessels & Constricts & Dilates
\hline III) & Digestive tract & Inhibits peristalsis & Increases peristalsis
\hline IV) & Pancreas & Stimulates activity & Inhibits activity
\hline \end{tabular} \end{center}- AP EAPCET - 2025
- Zoology
- nervous system
Which part of the human brain is responsible for:
(a) thinking
(b) picking up a pencil
(c) controlling blood pressure
(d) controlling hunger- CBSE Class X - 2025
- Science
- nervous system
- What are the two types of nervous system in the human body? Name the components of each of them.
- CBSE Class X - 2025
- Science
- nervous system
- Write the role of (a) motor and (b) relay neuron.
- CBSE Class X - 2025
- Science
- nervous system
- In life, there are certain changes in the environment called ‘stimuli’ to which we respond appropriately. Touching a flame suddenly is a dangerous situation for us. One way is to think consciously about the possibility of burning and then moving the hand. But our body has been designed in such a way that we save ourself from such situations immediately.
Name the action by which we protect ourselves in the situation mentioned above and define it.- CBSE Class X - 2025
- Science
- nervous system
Questions Asked in NEET exam
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
- NEET (UG) - 2025
- Moment Of Inertia
Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$- NEET (UG) - 2025
- Organic Chemistry
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
- NEET (UG) - 2025
- Electromagnetic Induction and Inductance
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
- Consider the diameter of a spherical object being measured with the help of a Vernier Callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least count in the M.S. is 0.1 cm and the zero of V.S. is at -0.1 cm when the jaws of Vernier callipers are closed. If the main scale reading for the diameter is \(M = 5\) cm and the number of coinciding vernier division is 8, the measured diameter after zero error correction, is:
- NEET (UG) - 2025
- Measurement of length
Concepts Used:
Nervous System
The nervous system, often known as the neural system, is a sophisticated network of neurons dedicated to the transmission of messages. As we progress up the food chain, the neurological system becomes more sophisticated.
Functions of Nervous System:
The nervous system's most basic job is to govern the organism's movement and to influence the environment (e.g., through pheromones). This is accomplished by transmitting signals from one cell to another, or from one body component to another. Signals that travel to muscle cells cause muscles to contract, and signals that travel to endocrine cells cause hormones to be released into the circulation or other internal fluids to cause the nervous system's output.