Q1: Given below are two statements: (NEET 2024)
Statement I: The cerebral hemispheres are connected by nerve tract known as corpus callosum.
Statement II: The brain stem consists of the medulla oblongata, pons and cerebrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
(a) Both Statement I and Statement II are correct.
(b) Both Statement I and Statement II are incorrect.
(c) Statement I is correct but Statement II is incorrect.
(d) Statement I is incorrect but Statement II is correct.
Ans: (c)
Statement I describes the corpus callosum, a structure in the brain. The corpus callosum is a large bundle of nerve fibers that connects the two cerebral hemispheres, allowing for communication between them. This statement is correct.
Statement II mentions the brain stem and lists its components as the medulla oblongata, pons, and cerebrum. The error here is in including the cerebrum as part of the brain stem. In actuality, the brain stem consists of the medulla oblongata, the pons, and the midbrain, not the cerebrum. The cerebrum is part of the forebrain and is responsible for higher cognitive functions such as thinking, perceiving, planning, and understanding language. Therefore, Statement II is incorrect.
Based on the analysis above, the correct answer is: Option C: Statement I is correct but Statement II is incorrect.
Q2: Match List I with List II: (NEET 2024)
Choose the correct answer from the options given below :
(a) A-II, B-III, C-I, D-IV
(b) A-III, B-IV, C-II, D-I
(c) A-I, B-III, C-II, D-IV
(d) A-II, B-I, C-III, D-IV
Ans: (b)
Sol: To match List I with List II correctly, we start by identifying the function of each brain region described in List I and match these descriptions to the corresponding functions stated in List II:
Pons: The pons is part of the brainstem located between the midbrain and the medulla oblongata. It principally acts as a bridge connecting various parts of the brain, and it is also involved in controlling essential functions like sleep and respiration.
Hypothalamus: The hypothalamus is a small portion at the base of the brain that plays a crucial role in hormone release and regulation of essential bodily functions, including temperature control, thirst, hunger, sleep, mood, and sexual behavior. It contains several neurosecretory cells that produce hormones.
Medulla: The medulla oblongata, also part of the brainstem, primarily controls autonomic functions such as breathing, heart rate, and digestion (including gastric secretions).
Cerebellum: The cerebellum is located at the back of the brain and is responsible for controlling motor skills, balance, coordination, and posture. It helps refine the movements dictated by the motor cortex.
Now, let's match these descriptions to those listed in List II:
A. Pons should match with "Connects different regions of the brain." - this corresponds to III.
B. Hypothalamus should match with "Neurosecretory cells." - this corresponds to IV.
C. Medulla should match with "Controls respiration and gastric secretions." - this corresponds to II.
D. Cerebellum should match with "Provides additional space for Neurons, regulates posture and balance." - this corresponds to I.
When we look at the given options:
Option A: A-II, B-III, C-I, D-IV (wrong)
Option B: A-III, B-IV, C-II, D-I (correct)
Option C: A-I, B-III, C-II, D-IV (wrong)
Option D: A-II, B-I, C-III, D-IV (wrong)
The correct answer is Option B: A-III, B-IV, C-II, D-I.
Q3: Match List-I with List-II: (NEET 2024)
Choose the correct answer from the options given below:
(a) A-III, B-IV, C-II, D-
(b) A-I, B-II, C-IV, D-III
(c) A-II, B-I, C-III, D-IV
(d) A-IV, B-II, C-III, D-I
Ans: (a)
Thus, the correct match is:
Q4: Match List-I with List-II (NEET 2024)Choose the correct answer from the options given below:
(a) A-III, B-I, C-IV, D-II
(b) A-I, B-IV, C-II, D-III
(c) A-IV, B-III, C-II, D-I
(d) A-II, B-III, C-I, D-IV
Ans: (a)
Thus, the correct match is:
Q1: The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are: (2023)
(a) Corpora quadrigemina and hippocampus
(b) Brain stem and epithalamus
(c) Corpus callosum and thalamus
(d) Limbic system and hypothalamus
Ans: (d)
Q2: The brain stem of the human brain consists of: (NEET 2023)
(a) Mid-brain, Pons and Medulla Oblongata
(b) Forebrain, Cerebellum and Pons
(c) Thalamus, Hypothalamus and Corpora quadrigemina
(d) Amygdala, Hippocampus and Corpus Callosum
Ans: (a)
The brain stem is the part of the brain that connects the brain to the spinal cord and is responsible for many vital functions such as heart rate, breathing, and sleep. It consists of three main parts:
Thus, the correct answer is (a).
Q1: Select the incorrect statement regarding synapses: (NEET 2022 Phase 1)
(a) Electrical current can flow directly from one neuron into the other across the electrical synapse.
(b) Chemical synapses use neurotransmitters.
(c) Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
(d) The membranes of presynaptic and postsynaptic neurons are ibn close proximity in an electrical synapse.
Ans: (c)
Option (c) is the correct answer as impulse transmission across an electrical synapse is always faster than that across a chemical synapse.
→ Chemical synapses use chemicals for transmission which are known as neurotransmitters.
→ The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse.
→ In an electrical synapse, the transmission of the impulse occurs in the form of an electrical current from one neuron to the next neuron.
Q2: Match List-I with List - II : (NEET 2022 Phase 2)
Choose the correct answer from the options given below :
(a) (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
(b) (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
(c) (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)
(d) (a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)
Ans: (a)
Option (a) is the correct answer because
(a) Multipolar neurons are present in cerebral cortex.
(b) Bipolar neurons are found in the retina of the eye.
(c) Myelinated nerve fibres are found in spinal and cranial nerves
(d) Unmyelinated nerve fibres are commonly found in autonomous and somatic neural systems.
Q1: Which part of the brain is responsible for thermoregulation? (NEET 2019)
(a) Medulla oblongata
(b) Cerebrum
(c) Hypothalamus
(d) Corpus callosum
Ans: (c)
Hypothalamus is responsible for thermoregulation.
Q1: Nissl’s bodies are mainly composed of (NEET 2018)
(a) Proteins and lipids
(b) DNA and RNA
(c) Nucleic acids and SER
(d) Free ribosomes and RER.
Ans: (d)
Nissl granules are composed of free ribosomes and RER. They are responsible for protein synthesis.
Q2: Which of the following structures or regions is incorrectly paired with its functions? (NEET 2018)
(a) Medulla oblongata | Controls respiration and cardiovascular reflexes |
(b) Limbic system | Consists of fibre tracts that interconnect different regions of brain controls movement |
(c) Hypothalamus | Production of releasing hormones and regulation of temperature, hunger and thirst |
(d) Corpus callosum | Band of fibers connecting left and right cerebral hemispheres |
Ans: (b)
Q1: Myelin sheath is produced by (NEET 2017)
(a) Astrocytes and Schwann cells
(b) Oligodendrocytes and osteoclasts
(c) Osteoclasts and astrocytes
(d) Schwann cells and oligodendrocytes.
Ans: (d)
Myelin sheath wrapped around the nerve axon. Oligodendrocytes are neuroglial cells which produce myelin sheath in central nervous system while Schwann cell produces myelin sheath in peripheral nervous system.
Q2: Receptor sites for neurotransmitters are present on (NEET 2017)
(a) Pre-synaptic membrane
(b) Tips of axons
(c) Post-synaptic membrane
(d) Membranes of synaptic vesicles.
Ans: (c)
Pre-synaptic membrane is involved in the release of neurotransmitter in the chemical synapse. The receptors sites for neurotransmitters are present on postsynaptic membrane of neuron.
Q1: Which of the following regions of the brain is incorrectly paired with its function? (NEET / AIPMT 2015 Cancelled Paper )
(a) Cerebellum – language comprehension
(b) Corpus callosum – communication between the left and right cerebral cortices
(c) Cerebrum – calculation and contemplation
(d) Medulla oblongata – homeostatic control
Ans: (a)
The cerebellum is mainly responsible for coordination and balance. It does not handle language comprehension, which is linked to other brain areas.
Injury to this area would primarily disrupt the regulation of body temperature.
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