#autonomic nervous system 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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Cardiovascular System: Heart

Parasympathetic stimulation reduces heart rate mainly by:

Correct option is C, Opening acetylcholine-sensitive K+ channels. In Cardiovascular System: Heart, the accurate description is Opening acetylcholine-sensitive K+ channels, 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 Opening acetylcholine-sensitive K+ channels does in Cardiovascular System: Heart. Then Opening acetylcholine-sensitive K+ channels 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 Opening acetylcholine-sensitive K+ channels.

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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Peripheral Nervous System

Parasympathetic nervous system is also called:

The correct answer is C: Craniosacral outflow. In Peripheral Nervous System, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, this is mainly a definition check, and Craniosacral outflow is the standard term or meaning used in Peripheral Nervous System. That is why Craniosacral outflow 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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Peripheral Nervous System

Sympathetic nervous system originates from:

Answer: B) Thoracolumbar region. For Peripheral Nervous System, once you lock onto the key mechanism or definition, Thoracolumbar region is the clear fit. If you restate the concept in your own words, Thoracolumbar region is the option that correctly names the structure, process, or principle asked for in Peripheral Nervous System. So Thoracolumbar region 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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