Students preparing for the NEET exam should cover all of the NEET syllabus's crucial chapters in order to score well in NEET 2024. National Eligibility and Entrance Test (NEET). The test is the only one in India for admission to undergraduate medical and paramedical programmes. It is administered once a year using a paper-pencil test (PBT), which takes three hours and twenty minutes. NEET consists of 200 questions in Physics, Chemistry, and Biology, of which 180 must be answered.
MBBS, BDS, BSc Nursing, BAMS, Veterinary, and other medical or paramedical programmes in India are commonly admitted through the National Testing Agency (NTA). Exams are administered in 13 languages. There are over 20 lakh applicants who take the NEET exam every year. Medical courses like MBBS, BDS, and BSc Nursing are the most popular.
NEET 2024 Syllabus
The NEET 2024 syllabus has undergone significant revisions. The NTA NEET syllabus 2024 is the same as the one released by NMC before. According to the NTA, providing the NEET syllabus 2024 PDF before the information brochure or application form allowed students to organize their preparation accordingly. Unlike prior years, the chapters are not divided into Class 11 and Class 12 chapters.
Furthermore, the NMC NEET Chemistry syllabus is divided into three parts: Organic Chemistry, Inorganic Chemistry, and Physical Chemistry. Several chapters or themes have been removed from all three disciplines, and a few new ones have been added. The changes to the NEET UG syllabus were made to provide conformity with the various State Board exam syllabuses for Classes 11 and 12.
Neural Control and Coordination NEET Questions:
Neural control and coordination are basic systems that allow the human body to function smoothly. It refers to the complex network of neurons, electrical impulses, and chemical messengers that convey information throughout the body. The brain serves as the command centre for this intricate symphony of neuronal activity, providing efficient communication between diverse organs and systems. The spinal cord plays an important part in this process by transferring information between the brain and peripheral nerves. Sensory receptors located throughout our bodies sense environmental stimuli such as touch or temperature changes, transforming them into electrical signals that go through sensory neurons to the central nervous system.
Simultaneously, motor neurons receive commands from higher brain regions and efficiently relay them to specific muscles or glands. This coordinated interaction enables us to conduct voluntary movements smoothly while sustaining important biological functions like respiration and digestion without conscious effort. Furthermore, brain control regulates autonomic activities such as heart rate and pupil dilation via involuntary reactions mediated by specialized nerve routes called reflex arcs. Understanding brain regulation and coordination reveals important information about how our bodies adapt to varied surroundings and respond to internal or external cues for peak performance and survival.
Also Read: NEET Official Answer Key
NEET Questions on Neural Control and Coordination:
1. What is an unmyelinated nerve fibre?
- Schwann cells do not contain myelin sheaths.
- Surrounded by Schwann cells that do not generate myelin sheaths.
- Myelin sheath is generated by oligodendrocytes, not Schwann cells.
- This is not present in the autonomous or somatic nervous systems.
Answer: b, surrounded by a Schwann cell that does not produce a myelin sheath.
Explanation: An unmyelinated nerve fibre is not surrounded by a Schwann cell and so does not have a myelin sheath. It is also known as an uninsulated nerve fibre and is found in both the autonomic and somatic nervous systems. Although these fibres lack a myelin coating, they do contain Schwann cells that stimulate axonal growth and development.
Q 2. Neuroglial cells guard and support _________.
- Nephrons
- Myoid cells
- Neurons
- None of the above
Answer: C, neurons
Explanation: Neuroglial cells, also known as glial cells, are supporting cells of the nervous system that perform a variety of roles, including neuronal protection and maintenance. These specialized cells serve as insulation between neurons and help to keep them in place so that they can communicate properly.
Q 3: The abundant inhibitory neurotransmitter present in the CNS is ___ _____
- Gamma-glutamyl transferase
- Gamma-linolenic acid.
- Gamma aminobutyric acid.
Answer: C. None of the above. Gamma aminobutyric acid.
Explanation: The most prevalent inhibitory neurotransmitter in the Central Nervous System is Gamma-Aminobutyric Acid (GABA). It regulates neuronal excitability across the nervous system and serves a variety of functions, including controlling anxiety, memory, and behaviour. GABA also helps to maintain a balance of excitatory and inhibitory transmission.
Q 4. The spinal cord's grey matter has ____ laminae.
- 2
- 4
- 6
- 10
Answer: c, 6
Explanation: The grey matter of the spinal cord is made up of six laminae, which are layers that alternate between cellular and fibre tracts. Each layer has distinct neuronal populations that coordinate various functions such as motor control, sensory input, autonomic output, and cognition. These layers collaborate to develop complex behaviours by combining data from diverse sense receptors throughout the body.
Q5. Both the thalamus and hypothalamus are located in the _________.
- Brain stem
- cerebrum
- cerebellum
- Diencephalon
Answer: D, Diencephalon.
Explanation: The Diencephalon contains the thalamus and hypothalamus. The diencephalon contains various structures, including the thalamus and hypothalamus, which are responsible for conveying sensory information and maintaining homeostasis.
Q6. Which of the following is the primary coordination centre for sensory and motor inputs in the brain?
- Hypothalamus
- Thalamus
- Corpora quadrigemina
- Amygdala
Answer: (b), Thalamus.
The Thalamus is the primary coordinating centre for sensory and motor signaling in the cerebrum. It functions as a relay station, receiving sensory input from all bodily locations and routing it to the proper part of the cerebrum for processing. The thalamus also aids in the coordination of output signals from the cerebrum, which helps regulate motor function.
Q7. The sensory neuron reaches the spinal cord through:
- Spinal nerve dorsal root
- Ventral root of the spinal nerve
- The root can be dorsal or ventral, depending on the location of origin.
- The dorsal and ventral roots of the spinal nerves
Answer: A, Dorsal root of the spinal nerve.
Explanation: A sensory neuron enters the spinal cord via the dorsal root of the spinal nerve. The ventral root sends motor impulses back to muscles and organs. Depending on where the sensory neuron originates, it might enter the spinal nerve's dorsal or ventral root.
Q 8: From inside to outside, the right sequence of the following cells in the retina is:
- ganglion cells, photoreceptor cells, and bipolar cells
- Ganglion cells - bipolar cells - photoreceptor cells
- Bipolar cells, photoreceptor cells, ganglion cells.
- Photoreceptor cells, ganglion cells, and bipolar cells
Answer: d, photoreceptor cells-bipolar cells-ganglion cells.
Explanation: Photoreceptors are the retina's outermost layer, capturing light impulses that are later transmitted to bipolar cells. Signals are amplified and eventually transmitted to ganglion cells, which then send them to the brain.
Q 9: The human eye's visual acuity is highest at:
- Macula lutea.
- Optical disc
- Fovea Centralis
- Optical chiasma
Answer: C, Fovea centralis.
Explanation: Visual acuity is maximum in the fovea centralis. The fovea is located near the optic disc and has a high concentration of cone cells, which are responsible for acute central vision. This part of the retina is responsible for detailed vision and colour perception, and it can detect very fine details from a short distance.
Q 10. The resting membrane potential is principally determined by:
- Sodium-potassium pumps
- Efflux of potassium
- Inflow of sodium
- Inflow of chloride
Answer: (A) Sodium potassium pump.
Explanation: A negative potential arises outside the cell as a result of a positive charge imbalance created by the Sodium-Potassium pump, which removes 3 sodium ions and adds 2 potassium ions.
How Do I Prepare for NEET 2024?
NEET preparation should begin well in advance because the exam is highly competitive. They should spend at least one year preparing for the exam. Candidates studying for NEET 2024 should first become familiar with the exam structure and syllabus. After that, they must choose the ideal books to use for NEET 2024 preparation. To finish the syllabus topics, refer to NCERT books. Candidates must create a timetable for NEET preparation. This should be followed to finish the preparation on time. Another key component of preparation is to complete mock examinations and sample papers. Because all components of the exam have equal weightage, candidates should focus equally on all sections or subjects in order to achieve a balanced result. After taking regular mock examinations, students will gain an awareness of their strengths and weaknesses, and they should focus their subject or topic preparation accordingly. Students should devote at least two years to NEET preparation. In general, students begin NEET study following the Class 10 Board test. The NEET syllabus is comparable to that of Class 11 and Class 12, making it simple for candidates to prepare simultaneously.
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