Neural Control and Coordination
Explain the mechanism of muscle contraction by sliding filament theory.
What is a synapse? How is the nerve impulse transmitted across a chemical synapse? Explain.
What is a synovial joint? What makes such a joint move freely? Describe any three kinds of synovial joints in the human body, giving one example of each.
What is a ‘reflex action’? With the help of an example describe the functions of the various components of a spinal reflex arc.
What is resting membrane potential of a neuron? What is the role of sodium potassium pumps in maintaining it?
Draw a section of the microscopic structure of human retina and label any six parts in it.
Name the structure that determines the eye colour in humans. What is the normal function of this structure?
Name the point of sharpest vision and the point of no vision in human eye.
Draw the basic structure of a neural synapse and label the following parts in it Presynaptic cell, Postsnaptic cell, Vesicles, Neurotransmitter, Receptor, Synaptic cleft.
Give any two differences between chemical synapses and electrical synapses.
Give the location and function in the human eye, of the following:
(c) Vitreous humour
Mention where the following are located in the human brain, and give one function of each:
(a) Temporal lobe
(c) Corpus callosum
Draw a labelled sketch of L.S. of a human grinding tooth fixed in the socket.
Draw a schematic diagram to show the spinal reflex arc. Label the components of the pathway.