Chapter 21

Select the incorrect statement: (a) Coordination is the process through which two or more organ interact and complement the function of one another. (b) Neural system provides on organized network of point to point connection for quick coordination. (c) Neural organization is complex in lower invertebrates. (d) Vertebrates have more developed neural system.

Identify A, B, C, D and E: (a) A-Central Nervous System (CNS), B-Peripheral Nervous System (PNS), C-Spinal cord, D-Sympathetic Neural System, E-Parasympathetic Neural System (b) A-Peripheral Nervous System (PNS), B-Parasympathetic Neural System, C-Central Nervous System (CNS), D-Sympathetic Neural System, E-Spinal cord (c) A-Parasympathetic Neural System, B-Spinal cord, C-Central Nervous System (CNS), D-Sympathetic Neural System, E-Peripheral Nervous System (PNS) (d) A-Central Nervous System (CNS), B-Spinal cord, C-Peripheral Nervous System (PNS), D-Sympathetic Neural System, E-Parasympathetic Neural System

Somatic neural system transmits impulse to (a) Skeletal muscles (b) Involuntary organs (c) Smooth muscles (d) All of these

Which of the following lacks a neural system? (a) Hydra (b) Silver fish (c) Spongia (Sponges) (d) Ophiura

Nervous system of hydra is composed of (a) Ganglia chain (b) Vertical ganglion chain interconnected by commissure (c) Network of nerves (d) Brain

Nissl's granules are found in all except (a) Cyton (b) Dendrites (c) Axon (d) Cell body

Which of the following system relays impulse from CNS to skeletal muscles? (a) Somatic neural system (b) Sympathetic neural system (c) Parasympathetic neural system (d) Autonomic neural system

Dendrites transmit impulse cell body and axon transmits impulse (a) towards, away from (b) away, towards (c) towards, towards (d) away, away

Bipolar axons are found in (a) Retina of eye (b) Cerebral cortex (c) Mesencephalon (d) Embryonic stage

Unipolar axons are found in (a) Respiratory epithelium (b) Retina (c) Embryo (d) Cerebral cortex

Schwann cell is absent in (a) Myelinated neuron (b) Non myelinated (c) Astrocytes (d) Both (b) and (c)

Neuron can (a) Detect stimuli (b) Receive stimuli (c) Transmit stimuli (d) All of these

Match the Column: Column I A. Unipolar B. Bipolar C. Multipolar Column II 1\. Cell body with one axon only, found usually in the embryonic stage. 2\. Cell body with one axon and two or more dendrites, found in cerebral cortex. 3\. Cell body with one axon and one dendrite, found in retina of eye. (a) \(\mathrm{A}-1, \mathrm{~B}-3, \mathrm{C}-2\) (b) \(\mathrm{A}-2, \mathrm{~B}-1, \mathrm{C}-3\) (c) \(\mathrm{A}-3, \mathrm{~B}-2, \mathrm{C}-1\) (d) \(\mathrm{A}-1, \mathrm{~B}-2, \mathrm{C}-3\)

Myelinated nerve fibre is found in (a) Spinal nerve (b) Cranial nerve (c) Both (a) and (b) (d) None of these

Unmyelinated nerve fibres are commonly found in (a) ANS (b) Somatic neural system (c) Both (a) and (b) (d) None of these

The outermost of the 3 cranial meninges is (a) Arachnoid (b) Dura (c) Pia (d) Sclera

Brain stem is formed by (a) Fore brain (b) Mid brain (c) Hind brain (d) Both (b) and (c)

Right and left cerebral hemispheres are connected via (a) Corpus striatum (b) Corpus callosum (c) Thalamus (d) Hippocampus

Forebrain consist of (a) Cerebrum (b) Thalamus (c) Hypothalamus (d) All of these

The cerebrum is made up of how many cerebral hemisphere? (a) 1 (b) 2 (c) 3 (d) 4

Select the incorrect statement: (a) Cerebral cortex, greyish in appearance thrown into prominent folds known as sulci and gyri. (b) Concentrated neuron cell body gives grey color to the cerebral cortex. (c) Fibres of the tract, covered with myelin sheath, constitute inner part of cerebral hemisphere. (d) Cerebrum is wrapped around the structure called medulla.

Cerebral cortex contains (a) Sensory area (b) Motor area (c) Large association area (d) All of these

The association area in cerebral cortex is responsible for (a) Inter sensory association (b) Memory (c) Communication (d) All of these

The major coordinating centre for sensory and motor signaling is (a) Thalamus (b) Hypothalamus (c) Medulla (d) Pons

Hypothalamus contain the brain centre which controls the (a) Body temperature (b) Urge for eating (c) Urge for drinking (d) All of these

Which of the following is true about hypothalamus? (a) Situated at the base of thalamus (b) Contains neurosecretory cell (c) It contains the centre for thermoregulation (d) All of these

Limbic system consists of (a) Amygdala (b) Hippocampus (c) Both (a) and (b) (d) None of these

The part of brain located between the thalamus, hypothalamus of fore brain and pons is known as (a) Mid-brain (b) Hind-brain (c) Limbic system (d) All of these

Which of the following is true about midbrain? (a) A canal called cerebral aqueduct passes through the mid-brain. (b) The dorsal portion of mid-brain consists of four round swelling called corpora quadrigemina. (c) It forms the part of brain stem. (d) All the above

The hind-brain consists of (a) Pons (b) Medulla oblongata (c) Cerebellum (d) All of these

Hypothalamus controls (a) Body's thermostat (b) Respiration (c) Gastric secretions (d) All of these

Limbic system controls (a) Sexual behaviour (b) Motivation (c) Affection (d) All of these

Corpora quadrigemina are present on portion of Mesencephalon (midbrain). (a) Anterior (b) Dorsal (c) Ventral (d) Lateral

Which of the following is false about hind-brain? (a) Pons, a part of it consist of fibre tracts that interconnects different regions of brain. (b) The cerebellum part of it has very convoluted surface to accommodate many neurons. (c) Medulla of this part is connected to the spinal cord. (d) The hind-brain is known for regular excitement, pleasure, rag and fear.

Medulla contains the centre for (a) Respiration (b) Cardiovascular reflex (c) Gastric Secretion (d) All of these

Which of the following consists of fibre tracts interconnecting the different regions of brain? (a) Cerebellum (b) Pons varoli (c) Medulla (d) All of these

Which of the following helps in the regulation of respiration? (a) Medulla (b) Cerebral cortex (c) Pons (d) Both (a) and (c)

Reflex action is under (a) CNS (b) Spiral cord (c) Peripheral Nervous Stimulation (d) Voluntary response

The dorsal nerve root ganglion is (a) Bipolar (b) Unipolar (c) Pseudounipolar (d) Multipolar

In spiral cord of humans, the grey matter is shaped. (a) Circular (b) Irregular (c) Butterfly (d) None of these

White matter is in brain and \(\longrightarrow\) in spiral cord (in case of humans) (a) Outside, inside (b) In, out (c) In, in (d) Out, out

Resting axonal membrane is (a) Unpolarized (b) Unpolarized and more permeable to \(\mathrm{K}^{+}\) (c) Polarized and more permeable to \(\mathrm{Na}^{+}\) (d) Polarized and more permeable to \(\mathrm{K}^{+}\)

\(\mathrm{Na} / \mathrm{K}\) pumps transports (a) \(3 \mathrm{Na}^{+}\) out for \(2 \mathrm{~K}^{+}\) in (b) \(3 \mathrm{Na}^{+}\) in for \(2 \mathrm{~K}^{+}\) out (c) \(2 \mathrm{Na}^{+}\) out for \(3 \mathrm{~K}^{+}\) in (d) \(2 \mathrm{Na}^{+}\) in for \(3 \mathrm{~K}^{+}\) out

Which of the following is true about neural membrane? (a) Different type of ion channels present. (b) Ion channels are selectively permeable. (c) Impermeable to negatively charged protein present in axoplasm. (d) All the above

Axoplasm have (polarized) (a) High \(\mathrm{K}^{+}\) ion (b) Low \(\mathrm{Na}^{+}\) ion (c) Negatively charged proteins (d) All of these

The electrical potential difference across the resting plasma membrane is called as (a) Spike potential (b) Action potential (c) Resting potential (d) All of these

Depolarization occurs due to (a) Influx of \(\mathrm{Na}^{+}\) (b) Eflux of \(\mathrm{Na}^{+}\) (c) Influx of \(\mathrm{K}^{+}\) (d) Eflux of \(\mathrm{K}^{+}\)

The correct sequence for depolarization and repolarization is (A) Stimulus applied at a site on polarized membrane (B) Increase the permeability for \(\mathrm{Na}^{+}\) (C) Generation of A.P.(Action Potential) (D) Increase the permeability for \(\mathrm{K}^{+}\) (E) Restoration of membrane potential (a) \(\mathrm{A} \rightarrow \mathrm{B} \rightarrow \mathrm{C} \rightarrow \mathrm{D} \rightarrow \mathrm{E}\) (b) \(\mathrm{B} \rightarrow \mathrm{A} \rightarrow \mathrm{C} \rightarrow \mathrm{D} \rightarrow \mathrm{E}\) (c) \(\mathrm{A} \rightarrow \mathrm{D} \rightarrow \mathrm{C} \rightarrow \mathrm{B} \rightarrow \mathrm{E}\) (d) \(\mathrm{A} \rightarrow \mathrm{B} \rightarrow \mathrm{D} \rightarrow \mathrm{C} \rightarrow \mathrm{E}\)

Unidirectional transmission of the nerve impulse is maintained by (a) Interneurons (b) Myelin sheath (c) Synapse (d) Membrane polarity

Select the total number of true statements from the following. 1) There are two types of synapses, namely electrical synapses and chemical synapses. 2) Electrical synapses are rare in our system. 3) At chemical synapse, the membranes of pre-and post-synaptic neuron are in very close proximity. 4) Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon. 5) At a chemical synapse, the membrane of the pre- and post-synaptic neurons are separated by a fluid-filled space called synaptic cleft. (a) 2 (b) 3 (c) 4 (d) 5