🧠
Neural Control and Coordination NEET PYQs
Class XI Biology
•
NCERT Based
•
NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
This page score: 0 /40
12 questions in this chapter
Match List-I with List-II with respect to human eye.
List-I
List-II
(A)Fovea
(I)Visible coloured portion of eye
that regulates diameter of pupil.
(B)Iris
(II)External layer of eye formed of
dense connective tissue.
(C)Blind spot
(III)Point of greatest visual acuity or
resolution.
(D)Sclera
(IV)Point where optic nerve leaves
the eyeball and photoreceptor
cells are absent.
Choose the correct answer from the options given below:
A A-II, B-I, C-III, D-IV B A-III, B-I, C-IV, D-II C A-IV, B-III, C-II, D-I D A-I, B-IV, C-III, D-II
Show explanation
Explanation will be generated when opened.
The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are:
A Corpus callosum and thalamus B Limbic system & hypothalamus C Corpora quadrigemina & hippocampus D Brain stem & epithalamus
Show explanation
Explanation will be generated when opened.
Select the incorrect statement regarding synapses:
A Electrical current can flow directly from one
neuron into the other across the electrical synapse. B Chemical synapses use neurotransmitters C Impulse transmission across a chemical synapse
is always faster than that across an electrical
synapse. D The membranes of presynaptic and postsynaptic
neurons are in close proximity in an electrical
synapse.
Show explanation
Explanation will be generated when opened.
Which of the following is associated with decrease in cardiac output?
A Sympathetic nerves B Parasympathetic neural signals C Pneumotaxic centre D Adrenal medullary hormones
Show explanation
Explanation: Decrease in cardiac output occurs mainly when parasympathetic neural signals to the heart prevail. The vagus nerve slows the heart rate (and reduces contraction strength), lowering cardiac output. In NCERT, the parasympathetic system reduces heart rate and thus CO. Sympathetic nerves increase heart rate and force of contraction, raising CO. Adrenal medullary hormones (adrenaline) also increase heart rate and strength, again increasing CO. The pneumotaxic centre primarily regulates breathing patterns, not directly cardiac output, so it does not cause a decrease in CO by itself. Therefore, option 2 is correct.
🧠 Did You Know? Parasympathetic effects on the heart are mediated by muscarinic receptors that slow heart rate.
💡 NCERT Memory Line: Parasympathetic (vagal) activity decreases heart rate and cardiac output; sympathetic activity increases them.
Match the following columns and select the correct option:
Column-I
Column-II
(A)Rods and Cones
(I)Absence of photoreceptor cells
(B)Blind Spot
(II)Cones are densely packed
(C)Fovea
(III)Photoreceptor cells
(D)Iris
(IV)Visible coloured
portion of the eye
A (A)-(III), (B)-(I), (C)-(II), (D)-(IV) B (A)-(II), (B)-(III), (C)-(I), (D)-(IV) C (A)-(III), (B)-(IV), (C)-(II), (D)-(I) D (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
Show explanation
Explanation will be generated when opened.
Match the following columns and select the
correct option.
Column-I
Column-II
(A)Organ of Corti
(I)Connects middle ear and pharynx
(B)Cochlea
(II)Coiled part of the labyrinth
(C)Eustachian tube
(III)Attached to the oval window
(D)Stapes
(IV)Located on the basilar membrane
A (A)-(II), (B)-(III), (C)-(I), (D)-(IV) B (A)-(III), (B)-(I), (C)-(IV), (D)-(II) C (A)-(IV), (B)-(II), (C)-(I), (D)-(III) D (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
Show explanation
Explanation will be generated when opened.
Snow-blindness in Antarctic region is due to:
A Freezing of fluids in the eye by low temperature B Inflammation of cornea due to high dose of UV-B radiation C High reflection of light from snow D Damage to retina caused by infra-red rays
Show explanation
Explanation will be generated when opened.
Which part of the brain is responsible for
thermoregulation?
A Hypothalamus B Cerebrum C Corpus callosum D Medulla oblongata
Show explanation
Explanation will be generated when opened.
Which of the following statements is correct?
A Cornea consists of dense connective tissue of
elastin and can repair itself. B Cornea is an external, transparent and protective
proteinacious covering of the eye-ball. C Cornea is convex, transparent layer which is highly
vascularised. D Cornea consists of dense matrix of collagen and
is the most sensitive portion of the eye.
Show explanation
Explanation will be generated when opened.
Match List I with List II:
List-I
List-II
(A)Pons
(I)Provides additional space for Neurons,
regulates posture and balance.
(B)Hypothalamus
(II)Controls
respiration and gastric secretions.
(C)Medulla
(III)Connects different regions of the brain.
(D)Cerebellum
(IV)Neuro secretory cells
Choose the correct answer from the options given
below:
A A-III, B-IV, C-II, D-I B A-II, B-III, C-I, D-IV C A-II, B-I, C-III, D-IV D A-I, B-III, C-II, D-IV
Show explanation
Explanation will be generated when opened.
