Thursday, March 7, 2019

Neural control and coordination: Previous Year Questions Part 1

NEURAL CONTROL AND COORDINATION

2010 MARCH
1.     Complete the given flowchart:

2.     You may have an experience of sudden withdrawal of body parts when you come in contact with objects that are extremely cold. This response occurs involuntary without conscious efforts.
a.   Name the process behind this.
b.   Construct a flowchart showing the pathway of impulses during this process.
2010 SEPTEMBER (IMPROVEMENT)
1.     Incus, stapes and malleus are the three ear ossicles of the middle ear. Arrange them in the order in which they are present from tympanic membrane to the oval window of the cochlea. Explain their function. (1)
2.     Study the diagram.    
                           
Figure a & b given above are two axon terminals with synapse. Which one is conducting the impulse? Justify your answer. (2)
2011 MARCH
1.     Retina of the eye contains three layers of cells, photoreceptor cell, bipolar cell and ganglion cell. Arrange these cells from the inside to outside. (1)
2.     Flowchart showing impulse transmission through chemical synapse is given below. Complete it. (2)
Impulse arrives at        a) ………………………… terminal
b) ………………………………
Fusion of synaptic vesicles with plasma membrane
c) ……………………………….
Released neurotransmitters bind to receptor on post synaptic membrane
d) ……………………………….
Generation of new potential at post synaptic neuron
2011 OCTOBER (IMPROVEMENT)
1.     Two types of synapses are given in the diagrams A and B.
a.   Identify A and B. (1)
b.   Impulse transmission in ‘B’ is faster than that of ‘A’. Give reason. (1)
c.    Name the chemical substance that helps in the transmission of impulses in ‘A’. (1)
MARCH 2012
1.     Following is a schematic representation of an action.
Receptor → -------- ? ------- interneuron in the spinal cord
               ------- ? -------- ← Efferent pathway -------- ? ------
a.   Complete the schematic representation and identify it. (2)
b.   Give an example for such an action. (1)
2012 SEPTEMBER (IMPROVEMENT)
1.     Analyze the concept map given below and fill the gaps appropriately so as to explain the concept of brain. (3)
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PART 2

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