#physiology MCQ

Thermoregulation

Basal metabolic rate (BMR) contributes approximately what fraction of daily energy expenditure?

60–75% (C) is the right choice. This sits at the heart of Thermoregulation: the wording points straight to what is happening in the tissue or organ system. A useful study habit is to ask what the structure or process is for: 60–75% is the option that correctly names the structure, process, or principle asked for in Thermoregulation. That reasoning supports 60–75%. One solid sentence about why this works is enough for recall — you do not need a long essay for every MCQ. When you practise, cover the choices first, write 60–75% from memory, then reveal the letter — that habit builds real recall for Thermoregulation.

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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Thermoregulation

When heat production exceeds heat loss, body temperature will:

Answer: C) Increase. For Thermoregulation, once you lock onto the key mechanism or definition, Increase is the clear fit. If you restate the concept in your own words, Increase is the option that correctly names the structure, process, or principle asked for in Thermoregulation. So Increase 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. When you practise, cover the choices first, write Increase from memory, then reveal the letter — that habit builds real recall for Thermoregulation.

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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Thermoregulation

Heat conductance increases approximately how many times from vasoconstriction to vasodilation?

The correct answer is D: Eightfold. In Thermoregulation, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, Eightfold is the option that correctly names the structure, process, or principle asked for in Thermoregulation. That is why Eightfold 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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Thermoregulation

Heat conductance from core to skin increases maximum during:

Pick B: Vasodilation. Thinking about Thermoregulation 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: Vasodilation is the option that correctly names the structure, process, or principle asked for in Thermoregulation. Hence Vasodilation is correct. Treat this as a building block for the rest of Thermoregulation; 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 Vasodilation.

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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Thermoregulation

Extreme temperatures causing pain are detected by:

Go with C — Nociceptors. Within Thermoregulation, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Nociceptors is the option that correctly names the structure, process, or principle asked for in Thermoregulation. Holding that picture in mind makes Nociceptors 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 Nociceptors. 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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Thermoregulation

Warm receptors are activated mainly between temperatures of:

Go with C — 30–45°C. Within Thermoregulation, 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 30–45°C does in Thermoregulation. Holding that picture in mind makes 30–45°C 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 30–45°C. 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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Thermoregulation

Cold receptors are primarily associated with which nerve fibers?

Go with B — Aδ fibers and some C fibers. Within Thermoregulation, 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 Aδ fibers and some C fibers does in Thermoregulation. Holding that picture in mind makes Aδ fibers and some C 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 Aδ fibers and some C 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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Thermoregulation

Afferent sensing in thermoregulation mainly involves:

Pick B: Temperature receptors sending signals. Thinking about Thermoregulation 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 Temperature receptors sending signals does in Thermoregulation. Hence Temperature receptors sending signals is correct. Treat this as a building block for the rest of Thermoregulation; 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 Temperature receptors sending signals.

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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Cardiac Cycle and Regulation

First phase of cardiac cycle is initiated by:

Go with B — Atrial contraction. Within Cardiac Cycle and Regulation, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Atrial contraction is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. Holding that picture in mind makes Atrial contraction 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 Atrial contraction.

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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Cardiovascular System: Heart

Fastest conduction of cardiac impulse occurs in:

Correct option is D, Purkinje fibers. In Cardiovascular System: Heart, the accurate description is Purkinje fibers, and that is what you should commit to memory. Keep the definition tight and the role clear — Purkinje fibers is the option that correctly names the structure, process, or principle asked for in Cardiovascular System: Heart. Then Purkinje fibers is the answer you can defend. Check yourself by covering the options and writing the answer first, then matching the letter — that builds confidence. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto Purkinje fibers. 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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Blood and their Component

Intrinsic pathway of blood clotting is initiated by:

Pick B: Factor XII. Thinking about Blood and their Component 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: Factor XII is the option that correctly names the structure, process, or principle asked for in Blood and their Component. Hence Factor XII is correct. Treat this as a building block for the rest of Blood and their Component; 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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Endocrinology

Conversion of dopamine to norepinephrine requires enzyme:

Go with D — Dopamine β-hydroxylase. Within Endocrinology, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, Dopamine β-hydroxylase is the option that correctly names the structure, process, or principle asked for in Endocrinology. Holding that picture in mind makes Dopamine β-hydroxylase 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 Dopamine β-hydroxylase.

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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