NEURAL CONTROL AND COORDINATION

 

Q21.Neurons are excitable cells. This statement beat illustrated as 

(1) Different ionic channels are present on neural membrane 

(2) tonic channels on neural membrane are selectively permeable 

(3) Neural membrane exists in a polarised state and responds to stimulus 

(4) Membrane is permeable to positive and impermeable to negatively charged ions 

Ans.3

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Q22.The structures of the CNG that develop from the embryological component Rhombencephalon are 

(1) Myelencephalon and metencephalon 

(2) Telencephalon and mesencephalon 

(3) Cerebrum and pons varoli 

(4) Hypothalamus and myelencephalon 

Ans.1

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Q23.Which lobe of cerebral hemisphere registers feeling of hot, cold, touch and pain? 

(1) Frontal 

(2) Parietal 

(4) Occipital 

(3) Temporal 

Ans.2

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Q24.Bulges present between the adjacent grooves of cerebrum are called 

(1) Sulci 

(2) Fissures 

(3) Gyri 

(4) Cortex 

Ans.3

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Q25.Which part/s of brain commands "how and when to move the body parts"? 

(1) Cerebellum's unconscious directions and cerebrum's conscious instruction 

(2) Cerebellum's conscious directions and cerebrum's unconscious instruction 

(3) Only cerebellum's conscious direction

(4) Only cerebrum's unconscious instructions 

Ans.1

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Q26.If we accidentally focus on intense light sources such as sun, it will damage which part of eye? 

(1) Blind spot 

(2) Yellow spot 

(3) Macula lutea 

(4) Both (2) and (3) 

Ans.4

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Q27.Tension on which region of eye determines, the shape of the lens suitable for focussing distant objects? 

(1) Ciliary muscle 

(2) Suspensory ligament 

(3) Circular iris muscle 

(4) Longitudinal iris muscle

Ans.2

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Q28.Select the incorrect statement. 

(1) There is no ventral root ganglia 

(2) All spinal nerves are mixed type 

(3) Vagus nerve regulates the functions of organs in the thoracic and abdominal cavities 

(4) III and IVth ventricle are connected together by foramen of Monro 

Ans.4

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Q29.Which neurotransmitter is used by sympathetic postganglionic neuron that terminates on sweat glands? 

(1) Adrenaline 

(2) Noradrenaline 

(3) Acetylcholine 

(4) Both (1) and (2) 

Ans.3

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Q30.Speed of propagation of an action potential can be determined by which of the following factors? 

(1) Diameter of axon 

(2) Presence or absence of myelin sheath

(3) Temperature 

(4) All of these 

Ans.4