#physiology practice MCQ

Thermoregulation

Efferent responses during cold exposure include all EXCEPT:

Sweating (D) 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: the stem is asking for the statement that does not fit the usual rule, and Sweating is that exception in the context of Thermoregulation. That reasoning supports Sweating. 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 Sweating 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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Reproductive System

LH acts on which cells in testes?

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

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

The pleural fluid volume in healthy humans is approximately:

The correct answer is B: 10–20 mL. In Cardiac Cycle and Regulation, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, 10–20 mL is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. That is why 10–20 mL 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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Cardiac Cycle and Regulation

Forceful expiration involves contraction of:

Pick C: Internal intercostals and abdominal muscles. 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: Internal intercostals and abdominal muscles is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. Hence Internal intercostals and abdominal muscles 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

Feed-forward regulation of circulation is seen during:

Answer: C) Exercise. For Cardiac Cycle and Regulation, once you lock onto the key mechanism or definition, Exercise is the clear fit. If you restate the concept in your own words, Exercise is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. So Exercise 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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Cardiac Cycle and Regulation

Sympathetic stimulation of heart increases rate mainly by:

Go with B — Increasing Ca²⁺ influx. Within Cardiac Cycle and Regulation, 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 Increasing Ca²⁺ influx does in Cardiac Cycle and Regulation. Holding that picture in mind makes Increasing Ca²⁺ influx 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 Increasing Ca²⁺ influx.

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

Third heart sound (S3) is associated with:

Answer: B) Rapid ventricular filling. For Cardiac Cycle and Regulation, once you lock onto the key mechanism or definition, Rapid ventricular filling is the clear fit. If you restate the concept in your own words, Rapid ventricular filling is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. So Rapid ventricular filling 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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Cardiac Cycle and Regulation

During atrial systole, which valves are open?

Pick C: AV valves. 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: AV valves is the option that correctly names the structure, process, or principle asked for in Cardiac Cycle and Regulation. Hence AV valves 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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Blood and their Component

Extrinsic pathway requires which tissue factor?

Answer: C) Factor III. For Blood and their Component, once you lock onto the key mechanism or definition, Factor III is the clear fit. If you restate the concept in your own words, Factor III is the option that correctly names the structure, process, or principle asked for in Blood and their Component. So Factor III 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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Blood and their Component

Normal RBC lifespan in circulation is approximately:

Go with D — 120 days. Within Blood and their Component, that statement lines up with the standard definition and the usual exam wording you’ll see. In plain terms, 120 days is the option that correctly names the structure, process, or principle asked for in Blood and their Component. Holding that picture in mind makes 120 days 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 120 days.

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

Hormone that has no intracellular storage in its synthesizing cell is:

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

Which pancreatic islet cell type secretes insulin?

Answer: B) Beta cell. For Endocrinology, once you lock onto the key mechanism or definition, Beta cell is the clear fit. If you restate the concept in your own words, Beta cell is the option that correctly names the structure, process, or principle asked for in Endocrinology. So Beta cell 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 Beta cell from memory, then reveal the letter — that habit builds real recall for Endocrinology.

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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