Recent questions tagged ch21

Regarding mechanism of hearing - choose the incorrect option :

asked Apr 3, 2014 by pady_1

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Regarding vestibular apparatus - choose the incorrect option :

asked Apr 3, 2014 by pady_1

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At the base of the cochlea, (i) the scala vestibuli ends at the oval window (ii)the scala tympani terminates at the round window which opens to the middle ear Regarding (i) and (ii) :

asked Apr 3, 2014 by pady_1

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Regarding visual perception - choose the incorrect statement :

asked Apr 3, 2014 by pady_1

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Regarding eye - choose the incorrect statement :

asked Apr 3, 2014 by pady_1

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1. The fovea is a thick portion of the retina where only the cones are densely packed. 2. It is the point where the visual acuity (resolution) is the greatest. Regarding 1 and 2 :

asked Apr 3, 2014 by pady_1

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Regarding midbrain, pons and medulla - choose the incorrect statement :

asked Apr 3, 2014 by pady_1

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1. The inner parts of cerebral hemispheres and a group of associated deep structures like amygdala, hippocampus, etc., form a complex structure called the limbic lobe or limbic system. 2. Along with the hypothalamus, limbic lobe is involved in the regulation of sexual behaviour, expression of emotional reactions (e.g., excitement, pleasure, rage and fear), and motivation Regarding 1 and 2 :

asked Apr 3, 2014 by pady_1

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Regarding Hypothalamus - choose the incorrect one :

asked Apr 3, 2014 by pady_1

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The brain is covered by cranial meninges consisting of an outer layer called _____ , a very thin middle layer called _ and an inner layer (which is in contact with the brain tissue) called _________ .

asked Apr 3, 2014 by pady_1

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Regarding CENTRAL NEURAL SYSTEM all are true except :

asked Apr 3, 2014 by pady_1

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Regarding the electrical and chemical synapses - choose the incorrect one :

asked Apr 3, 2014 by pady_1

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A synapse is formed _______________________________________ a gap called synaptic cleft.

asked Apr 3, 2014 by pady_1

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When a stimulus is applied at a site on the polarised membrane - (choose the incorrect statement) :

asked Apr 3, 2014 by pady_1

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Regarding resting potential - choose the correct statement :

asked Apr 3, 2014 by pady_1

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The electrical potential difference across the resting plasma membrane called the resting potential is maintained by all except :

asked Apr 3, 2014 by pady_1

1 answer

Unmyelinated nerve fibres - 1. Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon. 2. It is commonly found in autonomous and the somatic neural systems. Regarding 1 and 2 :

asked Apr 3, 2014 by pady_1

1 answer

Regarding the myelinated nerve fibres - choose the incorrect statement :

asked Apr 3, 2014 by pady_1

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Each axonal branch terminates as a bulb-like structure called synaptic **** which possess synaptic vesicles containing chemicals called ; the axons ________________________________ .

asked Apr 3, 2014 by pady_1

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1. Short fibres which branch repeatedly and project out of the cell body also contain Nissl’s granules and are called dendrites. 2. These fibres transmit impulses away from the cell body. Regarding 1 and 2 :

asked Apr 3, 2014 by pady_1

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Regarding NEURAL SYSTEM - choose the incorrect statement :

asked Apr 3, 2014 by pady_1

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Coordination is the process through which

asked Apr 3, 2014 by pady_1

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Regarding Types of neurons : Match the following and choose the most appropriate option: (each option on 3 columns can be matched to multiple options on the another 2 columns) eg. A-(iv)-3,5; B-(i); C-(iii)-2; D-(ii),(vi),(vii)-1; (iii),(v)-6;

asked Apr 2, 2014 by pady_1

1 answer

The _______ (C) is a structure located on the (D)which contains that act as auditory receptors. A large number of processes called _ are projected from the apical part of each hair cell. Above the rows of the hair cells is a thin elastic membrane called _________ (F).

asked Mar 26, 2014 by pady_1

1 answer

The membranes constituting cochlea, the ____ (A) and (D), divide the surounding perilymph filled bony labyrinth into _ (G) and _ (E). The space within cochlea called ________ (B) is filled with endolymph.

asked Mar 26, 2014 by pady_1

1 answer

The ear ossicles increase the efficiency of transmission of sound waves to the inner ear. An ________ (G) connects the middle ear cavity with the pharynx. The _ helps in equalising the pressures on either sides of the ear drum. The coiled portion of the labyrinth is called ___ (F).

asked Mar 26, 2014 by pady_1

1 answer

The middle ear contains three ossicles called ____ (A), (B) and _ (C) which are attached to one another in a chain-like fashion. The __ (A) is attached to the _ (H) and the is attached to the ________ (D) of the cochlea.

asked Mar 26, 2014 by pady_1

1 answer

The space between the cornea and the lens is called the __ (A) and contains a thin watery fluid called . The space between the lens and the retina is called the (K) and is filled with a transparent gel called _ .

asked Mar 26, 2014 by pady_1

1 answer

The _______ (G) leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eye ball. Photoreceptor cells are not present in that region and hence it is called the (H) . At the posterior pole of the eye lateral to the _ (H) , there is a yellowish pigmented spot called _ with a central pit called the _____ (I) .

asked Mar 26, 2014 by pady_1

1 answer

The __ (B) itself continues forward to form a pigmented and opaque structure called the (D) which is the visible coloured portion of the eye. The eye ball contains a transparent crystalline (L) which is held in place by ligaments attached to the (B) . The inner layer is the _ (J).

asked Mar 26, 2014 by pady_1

1 answer

The external layer (among three layers of eye) is composed of a dense connective tissue and is called the _____ (E) . The anterior portion of this layer is called the _ (C) . The middle layer, __________ (F) , contains many blood vessels and looks bluish in colour. The _ (F) layer is thin over the posterior two-thirds of the eye ball, but it becomes thick in the anterior part to form the __________ (B).

asked Mar 26, 2014 by pady_1

1 answer

Identify the structures marked as G, H, I and J in order in the picture:

asked Mar 26, 2014 by pady_1

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The _____ (C) receives signal from a (B) and transmits the impulse via a (D) into the CNS (at the level of spinal cord). The (E) then carries signals from CNS to the _ (F). The _ (A) and (K) thus forms a reflex arc as shown below in the ________ reflex.

asked Mar 26, 2014 by pady_1

1 answer

1. The left and right cerebral hemispheres are connected by a tract of nerve fibres called ________ (K). 2. The _(F) comprises (G), (M) and _____ (H).

asked Mar 26, 2014 by pady_1

1 answer

A canal called the ___________(L) passess through the midbrain. _ (E) and _ (F) form the ________ (I) .

asked Mar 26, 2014 by pady_1

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The ______ (E) is located between the (B) / ( C) of the _(D) and _ (G) of the __ (F) .

asked Mar 26, 2014 by pady_1

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The _______ (D) consists of _(A), (B) and ( C) . _______ forms the major part of the human brain.

asked Mar 26, 2014 by pady_1

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Pre synaptic neurons in response to stimuli release their neurotransmitters in the . The released neurotransmitters bind to their specific __ . What is (A)?

asked Mar 26, 2014 by pady_1

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At a _ (F) , the are separated by a fluid-filled space called ___ .

asked Mar 26, 2014 by pady_1

1 answer

Identify the structure and fill in the blanks) The distal end of axon is branched and each branch terminates as a bulb-like structure called ____________________ .

asked Mar 26, 2014 by pady_1

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A neuron is a microscopic structure composed of three major parts - ______ , and _ . The cell body contains cytoplasm with typical cell organelles and certain called . The ___ is a long fibre, the distal end of which is branched.( Identify the structure and fill in the blanks)

asked Mar 26, 2014 by pady_1

1 answer

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