Nervous Coordination (Chapter No.17) - MCQs Biology Book Two (English) - Class 2nd Year (XII or 12th) Science Group

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Chapter No.17
Nervous Coordination

Multiple Choice Questions

1. Encircle the correct choice:
i) Most of the neurons in the human brain are:
a) Sensory neurons
b) Motor neurons
c) Inter neurons
d) Auditory neurons

ii) A nervous system can alter activities in its target cells in muscles and gland because:
a) They are electrically coupled by gap junctions.
b) They target cells have receptor proteins for signal released by the nervous system:
c) The nervous system releases signals into the blood to control the target cells.
d) For a neuron with an initial membrane potential at -70my, increase in the movement of potassium ions out of tha; neuron’s cytoplasm would result in (a) Depolarization of the neuron (b) Hyperpolarization of neuron | | , he replacement of potassium ions with sodium ions, (d) The replacement of potassium ions with calcium ions. Action potentials move along axons . | (a) More slowly in axons of large than in small diameter, (b) The direct action of acetylcholine on the axon membrane, (c) Activating the sodium-potassium pump at each point along th on membrane. oj wee rapidly in myelinated than in non-myelinated axons. v) The surface on a neuron that discharges vesicles is the (a) Dendrite (b) Axon hillock ef Preupioric membrane (d) Postsynaptic membrane. vi) Aninhibitory postsynaptic potential occurs im a membrane made more permeable to Potassium ions (b) Sodium ions (c) Calcium ions (d) ATP vii) The major inhibitory neurotransmitter of the brain.is Moe (b) Epinephrine ) GABA (d) Endorphin vill) Where are neurotransmitter receptors located (a) On the nuclear membrane (b) In the myelin sheet ae nodes of Ranvier | On the postsynaptic membrane 1x) Which selection is incorrectly paired? (a) Forebrain => Diencephalon (b) Fore brain — Cerebrum Midbrain — Brainstem (d) Midbrain — Cerebellum Which of the following receptors is incorrectly paired with the type of energy is transduces? (a) Mechanoreceptors — Sound ain receptors — Electricity c) Chemoreceptors — Solute concentration (d) Thermo receptors — Heat x}