Download MBBS TMU 1st Year 2015 MBS102B Physiology II Question Paper

1. 
   Actin is composed of:
   

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   1. Myosin
   
   
   2. Troponin.
   
   

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   3. the spinal cord
   
   
   4. Tropomyosin
   
   
   
   

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2. 
   Actin-myosin interaction in resting state is inhibited by:
   
   
   

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   1. ATP
   
   
   2. calcium ions
   
   
   3. troponin

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   4. troponin-tropomoysin complex
   
   
   
   

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3. 
   Receptor potential:
   
   
   
   1. is a graded response

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   2. occurs due to change in permeability of membrane of receptor to ions
   
   
   3. can initiate an action potential in the nerve fiber attached to the receptor.
   
   

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   4. all of the above
   
   
   
   



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4. 
   Weber's Fechner law deals with:
   
   
   
   1. Frequency discrimination
   
   

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   2. Receptive field organization
   
   
   3. Intensity discrimination
   
   
   4. Two point discrimination

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5. 
   

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   Stretch reflex is:
   
   
   
   1. an important reflex that helps in maintaining upright posture
   
   
   2. lost in upper motor neuron lesion

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   3. exaggerated in lower motor neuron lesion
   
   
   4. All of the above
   
   

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6. 
   Giant Betz cells in brain are found in:
   

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   1. Motor cortex
   
   
   2. Thalamus
   
   

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   3. Hypothalamus
   
   
   4. Sensory cortex
   
   
   
   

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7. 
   The sympathetic system:
   
   
   

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   1. none of the above
   
   
   
   



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8. 
   Cerebrospinal fluid:
   
   
   
   1. is formed in the arachnoid granulations
   
   

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   2. provides the brain with most of its nutrition
   
   
   3. protects the brain from injury when the head is moved
   
   
   4. has a lower pressure than that in the cerebral venous sinuses

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9. 
   

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   All of the following are the features of cerebellar dysfunction, EXCEPT:
   
   
   
   1. ataxia
   
   
   2. adiadokokinesia

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   3. pendular knee jerk
   
   
   4. hypertonia
   
   

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10. 
    Lesions of which of the following hypothalamic nuclei cause loss of circadian rhythm:
    

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    1. ventromedial
    
    
    2. dorsomedial
    
    

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    3. suprachiasmatic
    
    
    4. supraoptic
    
    
    
    

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11. 
    Which one of the following cranial nerves is carrying the nerve fibers originating from the Edinger-Westphal nucleus:
    
    
    

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    1. oculomotor
    
    
    2. trochlear
    
    
    3. abducens

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    4. vagus
    
    
    
    

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12. 
    After removal of lens, the diopteric power of the eye is reduced by:
    
    
    
    1. 4D

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    2. 8D
    
    
    3. 16D
    
    

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    4. 32D
    
    
    
    



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13. 
    The pitch (frequency) of a sound is identified in the cochlea by:
    
    
    
    1. amount of vibration of the basilar membrane
    
    

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    2. number of hair cells that are stimulated
    
    
    3. region of stimulation of the basilar membrane
    
    
    4. amount of vibration in the tectorial membrane

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14. 
    

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    Growth hormone:
    
    
    
    1. enhances utilization of glucose by cells
    
    
    2. favors utilization of amino acids for energy

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    3. favors utilization of fatty acids for energy
    
    
    4. promotes deposition of fat in adipose tissue
    
    

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15. 
    The target organ of TRH is:
    

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    1. thyroid gland
    
    
    2. pituitary gland
    
    

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    3. adrenal gland
    
    
    4. pancreas
    
    
    
    

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16. 
    Insulin increases entry of glucose into:
    
    
    

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    1. the small renal tubule
    
    
    2. the mucosa of the small intestine
    
    
    3. neurons of motor cortex

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    4. skeletal muscle cells
    
    
    
    

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17. 
    Which of the following hormone level is raised in post-menopausal women:
    
    
    
    1. oestrogen

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    2. FSH
    
    
    3. progesterone
    
    

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    4. none of the above
    
    
    
    



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18. 
    HCG is structurally and functionally similar to:
    
    
    
    1. FSH
    
    

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    2. inhibin
    
    
    3. growth hormone
    
    
    4. LH

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