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 animal physiology questions  



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Author5 Posts
  #1

1. If the motor neuron is destroyed, what happens?

a)Related muscle can not be stimulated>>

b)Afferent nerve degeneartes>>

c)Motor neuron generate action potential>>

d)Motor neuron lose their myelin sheet>>

e)Related musce reains in contractile state>>

2. Spatial summation is.......................>>

a) Summation of depolarization potential generated by different synaptic end.>>

b) Summation of depolarization potential in time>>

c) Spatial adding of threshold potential>>

d) Sumation of impulses in the axon hilloc region of nerve>>

e) ( c) and (e) are true>>

3. Enkephalin is a neurotransmitter that...........>>

a) inhibits sensory impulses to the brain>>

b) inhibits pain impulses>>

c) may play a role in sleep>>

d) affects motor activity>>

e) inactivated by cholinesterase>>

4. Which region of brain includes autonomic neuruns that control respiration>>

a) Forebrain b) Occipital lobe c) Myelencephelon d)Cerebrum >>

e) Somatosensory cortex>>

5. As the thalamus is removed from the brain:>>

a) Sensory signal do not send to related area of cerebral cortex>>

b) Skeletal muscle can not be stimulated>>

c) Sensory signal can not be recieved by the receptor>>

d) Motor function is slowdown>>

e) None>>

6. When the symathetic nerve of heart is stimulated>>

a) Heart beat increase>>

b) The rate of respiration increase>>

c) Smooth mucle of digestive tract are inhibited>>

d) Norepinehrine is released from the ending of symathetic nerve>>

e) All of them >>

7. Which one of following does not occur when the sympathetic ganglia in both side of spinal cord is destroyed?>>

a) The effect of symathetic nerve to the internal organs disappear>>

b) Smooth muscle only are stimulated by parasymathetic nerve>>

c) Heart rate decrease>>

d) Animals do not adapt well in new conditions>>

e) All of above are true>>

> >

8. Which one of following is the function of spinal cord?>>

a) Coordinate motor function>>

b) Reflex activity of somatic muscle>>

c) Transissionof afferent impuses to the brain>>

d) Control of autonomic function>>

e) Both (b) and (c) are correct>>

9. What are vegatative function which is controlled from brain stem?>>

a) Respiration b) Hearing c) Speeking d) seeing >>

e) Both (b) and (c )>>

10. What are the afferents to the cerebellum related with?>>

a) the muscle length and strength>>

b) pain>>

c) pressure in body cavity>>

d) body posture>>

e) Both (a) and (d)>>




  #2

animal phsyiology....or human physiologysticking out tongue
tho not much difference...grin


  #3

answer to 1-- a


  #4

ans 3. b thru activation of mu recepters


  #5

ans 4 c ans 5 a





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