Human Nervous System – 25 Most Important MCQs with Answers

The human nervous system is one of the most vital systems in the body. It controls body functions, processes information, and coordinates responses. Below are the 25 most important and repeated MCQs on the Human Nervous System with answers that are useful for exams and quick revision.

1. Functional unit of nervous system is:

  • a) Axon

  • b) Neuron ✅

  • c) Dendrite

  • d) Brain

2. Which part of the brain controls balance and posture?

  • a) Cerebrum

  • b) Cerebellum ✅

  • c) Medulla oblongata

  • d) Pons

3. Largest part of human brain is:

  • a) Cerebellum

  • b) Medulla

  • c) Cerebrum ✅

  • d) Hypothalamus

4. Which nerve connects eye to brain?

  • a) Auditory nerve

  • b) Optic nerve ✅

  • c) Olfactory nerve

  • d) Vagus nerve

5. Sympathetic nervous system is a part of:

  • a) Central nervous system

  • b) Peripheral nervous system

  • c) Autonomic nervous system ✅

  • d) Somatic nervous system

6. Which lobe of cerebrum is associated with vision?

  • a) Frontal lobe

  • b) Temporal lobe

  • c) Occipital lobe ✅

  • d) Parietal lobe

7. Impulse transmission across a synapse is by:

  • a) Electric signals

  • b) Hormones

  • c) Neurotransmitters ✅

  • d) Ions only

8. Which meninges is in direct contact with the brain?

  • a) Dura mater

  • b) Arachnoid mater

  • c) Pia mater ✅

  • d) Subarachnoid space

9. The gap between two neurons is called:

  • a) Axon hillock

  • b) Synapse ✅

  • c) Myelin sheath

  • d) Dendritic cleft

10. The nerve responsible for hearing is:

  • a) Olfactory nerve

  • b) Optic nerve

  • c) Auditory nerve ✅

  • d) Vagus nerve

11. Which part of brain controls heart rate and breathing?

  • a) Cerebellum

  • b) Cerebrum

  • c) Medulla oblongata ✅

  • d) Pons

12. Which is the longest cranial nerve?

  • a) Optic nerve

  • b) Vagus nerve ✅

  • c) Facial nerve

  • d) Hypoglossal nerve

13. Which structure speeds up nerve impulse transmission?

  • a) Dendrites

  • b) Axon terminal

  • c) Myelin sheath ✅

  • d) Soma

14. Spinal cord ends at which vertebral level in adults?

  • a) L1–L2 ✅

  • b) L3–L4

  • c) T12

  • d) S1–S2

15. Which division of nervous system controls voluntary activities?

  • a) Autonomic

  • b) Sympathetic

  • c) Parasympathetic

  • d) Somatic ✅

16. Which ion is essential for neurotransmitter release?

  • a) Sodium (Na⁺)

  • b) Potassium (K⁺)

  • c) Calcium (Ca²⁺) ✅

  • d) Chloride (Cl⁻)

17. Which part of the brain acts as relay station for sensory impulses?

  • a) Hypothalamus

  • b) Thalamus ✅

  • c) Cerebellum

  • d) Midbrain

18. The outermost covering of brain is:

  • a) Arachnoid mater

  • b) Dura mater ✅

  • c) Pia mater

  • d) Gray matter

19. Reflex actions are controlled by:

  • a) Cerebrum

  • b) Cerebellum

  • c) Spinal cord ✅

  • d) Medulla

20. Which neurotransmitter is involved in muscle contraction?

  • a) Dopamine

  • b) Acetylcholine ✅

  • c) Serotonin

  • d) GABA

21. Which lobe of brain controls speech and personality?

  • a) Temporal

  • b) Frontal ✅

  • c) Parietal

  • d) Occipital

22. Which type of neuron carries impulses from receptors to CNS?

  • a) Motor neuron

  • b) Sensory neuron ✅

  • c) Relay neuron

  • d) Association neuron

23. Which ion is mainly responsible for depolarization in action potential?

  • a) K⁺

  • b) Na⁺ ✅

  • c) Cl⁻

  • d) Ca²⁺

24. Corpus callosum connects:

  • a) Cerebellum and medulla

  • b) Two hemispheres of cerebrum ✅

  • c) Spinal cord and brainstem

  • d) Thalamus and hypothalamus

25. The nervous system works in coordination with which system to maintain homeostasis?

  • a) Excretory system

  • b) Endocrine system ✅

  • c) Digestive system

  • d) Circulatory system

✅ Conclusion:
The human nervous system plays a central role in body coordination, control, and regulation. These MCQs cover important concepts related to brain, spinal cord, neurons, neurotransmitters, and their functions. Perfect for students preparing for competitive exams or quick revision.

Comments

Post a Comment

Popular posts from this blog

Image
  Smart Bio Notes"Hand-Drawn Chloroplast Diagram + Easy Explanation – Watch Now! 🎥" 🔬  What is a Chloroplast? "Chlorophyll is the green color in plants that acts like a solar panel, capturing sunlight to help the plant make its own food through photosynthesis." INTRODUCTION Chlorophyll is a green pigment found in plants, algae, and some bacteria. It is located in the chloroplasts of plant cells. Chlorophyll is essential for photosynthesis , the process by which plants make food. It absorbs sunlight , mainly blue and red light, and reflects green light (which is why plants look green). There are different types of chlorophyll , like chlorophyll a and b , with chlorophyll a being the most common. In this blog, we’ll explore the structure, function, and importance of chloroplasts with a detailed hand-drawn diagram to make learning easy for your exams and fun! 🎨📚 📌 Where Are Chloroplasts Found? Chloroplast has chlorophyll that is green in color thats why...
Read more
Image
"Cell Membrane: The Ultimate Protective Shield of Life – Structure, Functions & Importance" 🚀🔬 The cell membrane , also known as the plasma membrane , is an essential component of all living cells. It serves as a protective barrier , controlling what enters and exits the cell while maintaining a stable internal environment. Without it, cells would not be able to function properly! Structure of the Cell Membrane The cell membrane follows the fluid mosaic model , meaning it is flexible and consists of multiple components working together. Its structure includes: Phospholipid Bilayer : Two layers of molecules that form the boundary of the cell. The top circles are hydrophilic heads (water loving), and the tails inside are hydrophobic (water fearing). this keeps the cell safe! Proteins : Various proteins are embedded in the membrane, acting as channels.These are like tiny doors that control what enters and leaves the cell. Cholesterol : This molecule helps prevent cell mem...
Read more
Image
"Centrioles: Small Organelles, Big Impact on Your Cells" Cells have tiny structures that control how they divide?  Centrioles are small cylindrical structures found in animal cells, playing a key role in organizing the microtubules and facilitating cell division. Though often overlooked, these tiny organelles are critical in maintaining the shape and function of cells. What Are Centrioles? Centrioles are composed of 9 microtubules triplet arranged in a 9+0 pattern  in a cylindrical shape, each triplet consists of  three microtubules . Location Centrioles are found in the centrosome, a granular mass that serves as a microtubule organizing center(MTOC) Animal cells only Centrioles are only foundin animal cells. Centrioles in Cell Organization 1. Structure of Centrioles Cylindrical Shape : Centrioles are small, cylindrical structures found in the cytoplasm of animal cells. They are composed of microtubules arranged in a specific pattern: 9 sets of three microtubules ...
Read more