Action potential

Action potential

Primary role of Na+/K+ ATPase in neurons is to:

Pick B: Critical limit. Thinking about Action potential in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: the functional job described in the stem is exactly what Critical limit does in Action potential. Hence Critical limit is correct. Treat this as a building block for the rest of Action potential; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto Critical limit.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

During depolarization, membrane potential becomes:

Go with B — Less negative. Within Action potential, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Less negative is the option that correctly names the structure, process, or principle asked for in Action potential. Holding that picture in mind makes Less negative feel natural rather than something you only memorise. Link the term to a real body example (organ, tissue, or ion flow) so the idea stays concrete under exam pressure. A short mental diagram helps — start from stimulus or structure, follow the pathway, and stop at the functional result described by Less negative.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Action potential follows all-or-none law because:

Answer: C) Threshold once crossed produces fixed amplitude. For Action potential, once you lock onto the key mechanism or definition, Threshold once crossed produces fixed amplitude is the clear fit. If you restate the concept in your own words, cause and effect line up with Threshold once crossed produces fixed amplitude — that is the mechanism or reason the stem is pointing to. So Threshold once crossed produces fixed amplitude is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Decrease in extracellular Na+ concentration would primarily affect:

Go with B — Amplitude of action potential. Within Action potential, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, the functional job described in the stem is exactly what Amplitude of action potential does in Action potential. Holding that picture in mind makes Amplitude of action potential feel natural rather than something you only memorise. Link the term to a real body example (organ, tissue, or ion flow) so the idea stays concrete under exam pressure. A short mental diagram helps — start from stimulus or structure, follow the pathway, and stop at the functional result described by Amplitude of action potential.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Voltage-gated channels responsible for action potential are primarily located in:

The correct answer is C: Axons. In Action potential, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, the functional job described in the stem is exactly what Axons does in Action potential. That is why Axons is the option that holds up when you check it against basic physiology. When you revise, say the answer out loud with one short reason attached; that sticks better than rote lists. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that to the option text.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Local potentials mainly occur at:

Pick C: Dendrites and cell body. Thinking about Action potential in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: the functional job described in the stem is exactly what Dendrites and cell body does in Action potential. Hence Dendrites and cell body is correct. Treat this as a building block for the rest of Action potential; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Receptor potential differs from action potential because it:

Pick B: Is graded. Thinking about Action potential in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: cause and effect line up with Is graded — that is the mechanism or reason the stem is pointing to. Hence Is graded is correct. Treat this as a building block for the rest of Action potential; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto Is graded.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Generator potential is best described as:

The correct answer is C: Graded potential in sensory receptor. In Action potential, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, excitable-cell physiology turns on membranes, ions, and signalling steps, and Graded potential in sensory receptor captures the correct piece of that story. That is why Graded potential in sensory receptor is the option that holds up when you check it against basic physiology. When you revise, say the answer out loud with one short reason attached; that sticks better than rote lists. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that to the option text.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Equilibrium potential of an ion is defined as membrane potential at which:

Pick C: No net ion movement occurs. Thinking about Action potential in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: this is mainly a definition check, and No net ion movement occurs is the standard term or meaning used in Action potential. Hence No net ion movement occurs is correct. Treat this as a building block for the rest of Action potential; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Peak C of compound action potential represents:

Answer: D) C fibers. For Action potential, once you lock onto the key mechanism or definition, C fibers is the clear fit. If you restate the concept in your own words, C fibers is the option that correctly names the structure, process, or principle asked for in Action potential. So C fibers is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Compound action potential peak A corresponds to:

Go with C — Fast myelinated fibers. Within Action potential, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Fast myelinated fibers is the option that correctly names the structure, process, or principle asked for in Action potential. Holding that picture in mind makes Fast myelinated fibers feel natural rather than something you only memorise. Link the term to a real body example (organ, tissue, or ion flow) so the idea stays concrete under exam pressure. A short mental diagram helps — start from stimulus or structure, follow the pathway, and stop at the functional result described by Fast myelinated fibers.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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Action potential

Which factor increases speed of action potential propagation?

Go with C — Increased myelination. Within Action potential, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Increased myelination is the option that correctly names the structure, process, or principle asked for in Action potential. Holding that picture in mind makes Increased myelination feel natural rather than something you only memorise. Link the term to a real body example (organ, tissue, or ion flow) so the idea stays concrete under exam pressure. A short mental diagram helps — start from stimulus or structure, follow the pathway, and stop at the functional result described by Increased myelination.

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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