Nervous system in humans: Neural Control and Coordination - MCQs Quiz - 4
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Given below is a diagrammatic cross section of a single loop of human cochlea: Which one of the following options correctly represents the names of three different parts?
A: Perilymph, B: Tectorial membrane C: Endolymph
B: Tectorial membrane, C: Perilymph, D: Secretory cells
C: Endolymph, D : Sensory hair cells, A: Serum
D: Sensory hair cells, A: Endolymph B: Tectorial membrane
Examine the diagram of the two cell types A and B given below and select the correct option.
Cell-A is the rod cell found evenly all over retina
Cell-A is the cone cell more concentrated in the fovea centralis
Cell-B is concerned with colour vision in bright light
Cell-A is sensitive to low light intensities
Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina?
|(1)||Distribution||More concentrated in centre of retina||Evenly distributed all over retina|
|(3)||Visual pigment contained||Iodopsin||Rhodopsin|
|(4)||Overall function||Vision in poor light||Colour vision and detailed vision in bright light|
An action potential in the nerve fibre is produced when positive and negative charges on outside and the inside of the axon membrane are reversed because
all potassium ions leave the axon
more potassium ions enter the axon as compared to sodium ions leaving it
more sodium ions enter the axon as compared to potassium ions leaving it
all sodium ions enter the axon
The cutaneous plexus and the papillary plexus consist of
Specialized cells for cutaneous sensations
A network of arteries to provide dermal supply
A network of nerves to provide dermal sensation
Gland cells that release cutaneous secretions
Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?
Perikaryon and dendrites
Vacuoles and fibres
Flagellum and medullary sheath
Nucleus and mitochondria
Which one of the following is an example of negative feedback loop in humans?
Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
Secretion of tears after falling of sand particles into the eyes
Salivation of mouth at the sight of delicious food
Secretion of sweat glands and constriction of skin blood vessels when it is too hot
During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
First positive, then negative and continue to be negative
First negative, then positive and again back to negative
First positive, then negative and again back to positive
First negative, then positive and continue to be positive.
Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features (a-d). Which one feature is correctly described?
|Feature||Sympathetic Nervous System||Parasympathetic Nervous System|
|(a) Salivary gland||Stimulates secretion||Inhibits secretion|
|(b) Pupil of the eye||Dilates||Constricts|
|(c) Heart rate||Decreases||Increases|
|(d) Intestinal peristalsis||Stimulates||Inhibits|
Patients suffering from cholera are given a saline drip because
NaCl is an important component of energy supply
NaCl furnishes most of the fuel required for cellular activity
Na+ ions help in stopping nerve impulses and hence, sensation of pain
Na+ ions help in the retention of water in the body tissues
Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:
nerve fibre is insulated by a medullary sheath
sodium pump starts operating only at the cyton and then continues into the nerve fibre
neurotransmitters are released by dendrites and not by axon endings
neurotransmitters are released by the axon endings and not by dendrites
Assertion: The imbalance in concentration of Na+, K+ and proteins generates resting potential. Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.
Assertion is true, but Reason is false.
Both Assertion and Reason are false.
If vagus nerve in man is damaged, which of the following will not be affected?
The function of vagus nerve innervating the heart is to
Initiate the heart beat
Reduce the heart beat
Accelerate the heart beat
Maintain constant heart beat
Cornea transplant in humans is almost never rejected. This is because:
It is a non-living layer
Its cells are least penetrable by bacteria
It has no blood supply
It is composed of enucleated cells
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