#cardiac physiology MCQ

Cardiac Cycle and Regulation

Parasympathetic control of heart rate is mediated mainly via:

Vagus nerve (B) is the right choice. This sits at the heart of Cardiac Cycle and Regulation: 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: the functional job described in the stem is exactly what Vagus nerve does in Cardiac Cycle and Regulation. That reasoning supports Vagus nerve. 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 Vagus nerve from memory, then reveal the letter — that habit builds real recall for Cardiac Cycle and Regulation.

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

Second heart sound (S2) is produced due to closure of:

Correct option is B, Semilunar valves. In Cardiac Cycle and Regulation, the accurate description is Semilunar valves, and that is what you should commit to memory. Keep the definition tight and the role clear — cause and effect line up with Semilunar valves — that is the mechanism or reason the stem is pointing to. Then Semilunar valves 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 Semilunar valves.

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

T wave indicates:

Pick D: Ventricular repolarization. Thinking about Cardiac Cycle and Regulation 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: Ventricular repolarization is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. Hence Ventricular repolarization is correct. Treat this as a building block for the rest of Cardiac Cycle and Regulation; 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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Cardiac Cycle and Regulation

QRS complex represents:

Pick B: Ventricular depolarization. Thinking about Cardiac Cycle and Regulation 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: Ventricular depolarization is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. Hence Ventricular depolarization is correct. Treat this as a building block for the rest of Cardiac Cycle and Regulation; 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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Cardiovascular System: Heart

V1 and V2 ECG leads mainly record activity of:

The correct answer is C: Right ventricle and septum. In Cardiovascular System: Heart, 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 Right ventricle and septum does in Cardiovascular System: Heart. That is why Right ventricle and septum 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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Cardiovascular System: Heart

Lead II ECG records electrical activity from:

RA to LL (B) is the right choice. This sits at the heart of Cardiovascular System: Heart: 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: RA to LL is the option that correctly names the structure, process, or principle asked for in Cardiovascular System: Heart. That reasoning supports RA to LL. 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 RA to LL from memory, then reveal the letter — that habit builds real recall for Cardiovascular System: Heart.

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

T wave of ECG represents:

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

QRS complex corresponds to:

Ventricular depolarization (B) is the right choice. This sits at the heart of Cardiovascular System: Heart: 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: Ventricular depolarization is the option that correctly names the structure, process, or principle asked for in Cardiovascular System: Heart. That reasoning supports Ventricular depolarization. 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 Ventricular depolarization from memory, then reveal the letter — that habit builds real recall for Cardiovascular System: Heart.

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

Plateau phase of ventricular action potential is due to:

Go with C — Ca2+ influx with reduced K+ efflux. Within Cardiovascular System: Heart, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, cause and effect line up with Ca2+ influx with reduced K+ efflux — that is the mechanism or reason the stem is pointing to. Holding that picture in mind makes Ca2+ influx with reduced K+ efflux 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 Ca2+ influx with reduced K+ efflux.

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

Resting membrane potential of ventricular muscle cell is approximately:

-90 mV (C) is the right choice. This sits at the heart of Cardiovascular System: Heart: 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: -90 mV is the option that correctly names the structure, process, or principle asked for in Cardiovascular System: Heart. That reasoning supports -90 mV. 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 -90 mV from memory, then reveal the letter — that habit builds real recall for Cardiovascular System: Heart.

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

Nodal cell depolarization is mainly due to influx of:

Correct option is C, Ca2+. In Cardiovascular System: Heart, the accurate description is Ca2+, and that is what you should commit to memory. Keep the definition tight and the role clear — the functional job described in the stem is exactly what Ca2+ does in Cardiovascular System: Heart. Then Ca2+ 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 Ca2+. 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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