Top 550+ Solved Physiology MCQ Questions Answer

a. it is integrated by the medilla

b. breath is held in expiration

c. the glottis closes

d. it involves salivation

e. there are afferents from vestibular nuclei

a. nuclei of the hypothalamus

b. secretory granules in the posterior pituitary

c. circumventricular organs

d. neurons connecting vestibular nuclei with the vomiting centre

e. vesicles containing ACTH, TSH, GH, FSH, CH and PRL

a. glutamate

b. acetylcholine

c. substance P

d. opioid peptides

e. noradrenaline

a. Na+ channels are closed in the dark

b. light striking the outer segments results in a depolarising receptor potential

c. the receptor potentials are all-or-nothing

d. rhodopsin is a serpentine receptor

e. acetylcholine is released from the synaptic terminal

a. parieto-occipital sulcus

b. cuneus

c. calcanine fissure

d. lateral geniculate body

e. angular gyrus

a. the lateral geniculate bodies are made up of t layers

b. fibres for reflex pupillary constriction leave the optic nerve at the optic chiasm

c. pituitary tumours can cause homonymous hemianopia

d. macular sparing may or may not occur with lesions in the geniculocalcanine tract

e. binasal visual field fibres decussate at the opticchiasm

a. with strong stretch, the efferent discharge is decreased

b. with strong stretch, the discharge from the annulospiral endings of afferent nerve fibres is inhibited

c. with strong stretch, there is decreased activity in the afferent nerve fibres from the Golgi tendon organs

d. with strong stretch, there is increased activity in the afferent nerve fibres from the Golgi tendon organs

e. because of reciprocal innervation, there is increased discharge in the afferent nerve fibres from the antagonists to the stretched muscle

a. the amplitude of the motor response is increased

b. the motor response spreads to include other muscles and even other limbs

c. there is increased inhibition of stretch reflexes

d. the duration of the motor response increases

e. all of the above are true

a. impair pressure and pain sensation mostly from sacral and lumbar areas

b. impair fine touch and vibration mostly from sacral and lumbar areas

c. impair pain only from cervical areas

d. impair vibration sense only from cervical areas

e. impair joint position from sacral areas only

a. dorsal columns

b. parietal lobe

c. pressure pathways

d. all of the above

e. none of the above

a. optic nerve

b. optic chiasm

c. optic tract

d. optic radiation

e. visual cortex

a. the anterior hypothalamus contains temperature sensitive cells

b. shivering is activated by the posterior hypothalamus

c. the anterior hypothalamus controls mechanisms activated by heat

d. horripilation acts to increase heat production

e. fever is produced by the action of cytokines on the hypothalmus

a. the image becomes more clearly focused

b. there is adaptation in the visual cortex

c. the discharge rate in the bipolar cells increases

d. the pupils constrict

e. the image fades and disappears

a. cataracts

b. vitamin A deficiency

c. astigmatism

d. contrast between stimulus and background

e. all of the above

a. is activated by foreign bodies in the external auditory canal

b. results in vertigo

c. is activated by high-pitched sounds only

d. results in the decreased transmission of sound

e. none of the above