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
- Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h in the direction X to Y. She notices that a bus goes past her every 30 minutes in the direction of her motion, and every 10 minutes in the opposite direction. Choose the correct option for the period T of the bus service and the speed (assumed constant) of the buses.
- NEET (UG) - 2025
- Relative Velocity
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroids (\(I_0\) is the intensity of polarised light after passing through the first polaroid):
- NEET (UG) - 2025
- Polarization
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
- NEET (UG) - 2025
- Semiconductor Diode
- The correct order of the wavelength of light absorbed by the following complexes is:
A. $[ \text{Co(NH}_3\text{)}_6]^{3+}$
B. $[ \text{Co(CN)}_6]^{3-}$
C. $[ \text{Cu(H}_2\text{O)}_4]^{2+}$
D. $[ \text{Ti(H}_2\text{O)}_6]^{3+}$
Choose the correct answer from the options given below:- NEET (UG) - 2025
- Coordination chemistry
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.