1231. There is a bilateral loss of pain and temperature sensation on the trunk and upper limbs of a patient without any motor deficit. What is the most likely affected pathway ?

A. Lateral corticospinal tracts
B. Posterior columns
C. Reticulospinal tracts
D. Spinothalamic tracts *
E. Vestibulospinal tracts

1232. Which one of the following receptor types will transmit painful stimuli:

A. Mechanoreceptors
B. Pacinian corpuscles
C. Free nerve terminals
D. Thermal receptor *
E. Chemoreceptor

1233. When parallel rays of ight comes to focus on the retina the condition is called :

A. Aphakia
B. Astigmatism
C. Emmetropia *
D. Hyperopia
E. Myopia

1234. Action potential in retinal cells is characteristically exhibited in :

A. Amacrine cells
B. Bipolar cells
C. Cones
D. Ganglion cells *
E. Rods

1235. The naked nerve endings are responsible for the sensation of :

A. Hearing
B. Pain *
C. Touch
D. Vibration
E. Vision

1236. Taste receptors options :

A. For Sour taste predominate at posterior aspect of tongue
B. May only respond to only one modality of stimulus
C. Give rise to sweet taste when stimulated by H +
D. Cannot detect small ( < 10%) differences in the concentration of the taste evoking chemicals *
E. None of them

1237. Parasympathetic stimulation of bronchi cause :

A. Dilation
B. Constriction *
C. Weak dilation and powerful constriction
D. No effect
E. Powerful dilation and weak constriction

1238. Receptors for skin tactile sensibilities are located in :

A. Epidermis
B. Dermis
C. Mesoderm
D. Both A and B *
E. Muscles

1239. A person who lacks green cones is known as :

A. Protanope
B. Deuteranope *
C. General color blindiness
D. Heutrnope
E. Hemianopsia

1240. About 75 % of all parasympathetic nerve fibers are in in options :

A. Facial nerve
B. Glossopharyngeal nerve
C. Oculomotor nerve
D. Vagus nerves *
E. None of them