Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Deficiency abnormality of which of the following is responsible for Alzheimer's disease?
Alzheimer's disease is associated with a deficiency in acetylcholine, a neurotransmitter that plays a critical role in memory and learning. Reduced levels of acetylcholine in the brain are linked to the cognitive decline seen in Alzheimer's patients.
What is correct for the “number†of vagus Cranial nerve?
The vagus nerve is also known as the 10th cranial nerve (CN X). It is a part of the cranial nerves which begin in the brain and travel to various parts of the body. The vagus nerve is particularly important for its role in the parasympathetic nervous system, which oversees a range of functions including heart rate and digestion.
At which of the following Structure Sensitivity of retina is highest?
The most light sensitive part of retina is fovea or yellow spot
Assertion (A) and Reason( R) type questions
Statement A : Injury to interior Colliculi can impair hearing
Statement R : center to control auditory sense are lying in it
The inferior colliculi are part of the midbrain and play a crucial role in the auditory pathway. An injury to the inferior colliculi can impair hearing because they are involved in the processing of auditory information. Therefore, both the assertion and the reason are correct, and the reason provided is the correct explanation for the assertion.
Assertion (A) and Reason( R) type questions
Statement A: cochlea can be called true organ of hearing
Statement R : Organ of corti as present in it
The cochlea is indeed called the true organ of hearing because it contains the Organ of Corti, which houses the hair cells responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. Thus, both the assertion and the reason are correct, and the reason correctly explains the assertion.
Assertion (A) and Reason( R) type questions
Statement A: The movement (vibration) of basilar membrane
is necessary for hearing
Statement R : movement of basilar membrane separates sensory hair from tectorial membrane
Assertion (A) and Reason( R) type questions
Statement A: Rod cells possesses visual purple pigments
Statement R : They are sensitive to purple pigment color light
Rod cells contain a pigment called rhodopsin, which is often referred to as visual purple. However, rod cells are not specifically sensitive to purple light; they are more sensitive to low light levels and are responsible for vision in dim light conditions. Hence, the assertion is correct, but the reason is incorrect.
Assertion (A) and Reason( R) type questions
Statement A: corpus callasum join two cerebral hemispheres
Statement R : corpus callosumis formed of unipolar neurons
The corpus callosum does join the two cerebral hemispheres, which is true. However, it is composed of myelinated axons (white matter) rather than unipolar neurons. Therefore, the assertion is correct, but the reason is incorrect.
Assertion (A) and Reason( R) type questions
Statement A : optic nerve leaves eye ball at little lower and
posterior pole of the eye ball
Statement R : Photosensitive cells are not present at this place
Assertion (A) and Reason( R) type questions
Statement A : Nad+d and Kd+d pumps
are activated after repolarization
Statement R : By them lonic imbalance created due to repolarization is removed
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.