Free Nerve and Muscle practice for NEET PG and INI-CET Physiology, with a written explanation on every question.
6 questions · Free explanations
Showing 1–6 of 6 questions
Q1 · Action Potential
NEET PGEasyExplanation
The upstroke results from opening of voltage-gated sodium channels and rapid sodium influx. Repolarisation follows from potassium efflux as sodium channels inactivate.
Q2 · Neuromuscular Junction
NEET PGEasyExplanation
Acetylcholine is released at the neuromuscular junction and acts on nicotinic receptors on the motor end plate, triggering muscle depolarisation. It is broken down by acetylcholinesterase.
Q3 · Muscle Contraction
NEET PGMediumExplanation
Calcium binds troponin C, causing tropomyosin to shift and expose actin's myosin-binding sites, allowing cross-bridge formation. This is the trigger step of excitation-contraction coupling.
Q4 · Sarcomere
MediumExplanation
In the sliding filament model, the I band and H zone shorten during contraction while the A band, the length of the thick filament, stays constant. The sarcomere shortens as filaments slide past each other.
Q5 · Nerve Fibre Types
HardExplanation
A-alpha fibres are the largest and most heavily myelinated, giving the fastest conduction for motor function and proprioception. Unmyelinated C fibres, carrying slow pain and temperature, are the slowest.
Q6 · Refractory Period
MediumExplanation
In the absolute refractory period, voltage-gated sodium channels are inactivated and cannot reopen until the membrane repolarises, so no stimulus, however strong, can trigger another action potential.
Nerve and Muscle sits within Physiology, which carries the same syllabus in both exams. This set runs to 6 questions, each tagged Easy, Medium or Hard, 1 of them at Hard, and 3 drawn from previous-year papers.
Answer first, then read the explanation even on the ones you got right — the reasoning is where Nerve and Muscle marks are actually won, and it is what separates a recalled fact from a question you can solve in a new form. Once the Easy set feels comfortable, filter to Hard to find the gaps Physiology examiners keep returning to.
FAQ
Yes. Every question and explanation in this Nerve and Muscle set is free and open — no login, no form and no payment. The explanation appears the moment you answer.
Nerve and Muscle sits within Physiology, which appears in the same form in both syllabuses. System-wise physiology with the mechanisms examiners test most: cardiac and respiratory regulation, renal handling, endocrine axes and nerve conduction.
No. No account, no password, no OTP. Answer in the browser and your answers stay on your device for the session.