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Class 11 Biology
Neural Control And Coordination Chapter 21
Quiz 1
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Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
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Biceps of upper arm - Smooth muscle fibres
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Abdominal wall - Skeletal muscle
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Heart wall - Involuntary unstriated muscle
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Iris - Involuntary smooth muscle
Chemicals which are released at the synaptic junction are called
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Nucleus and mitochondria
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Vacuoles and fibres
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Flagellum and medullary sheath
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Perikaryon and dendrites
The junction between the axon of one neuron and the dendrite of the next is called
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Lymph
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Hormones
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Neurotransmitters
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Cerebrospinal fluid
The electrical potential difference between outside and inside of a nerve axon before excitation is known as
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A joint
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Constant bridge
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Junction point
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Synapse
Cells of Schwann are associated with
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Spike potential
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Resting potential
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Activation potential
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Reaction potential
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Action potential
Nerve cells do not divide because they do not have
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Skeleton muscle
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Connective tissue
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Cardiac muscle
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Nervous tissue
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Cartilage tissue
Which of the cells are phagocytic as well as scavengers?
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Mitochondria
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Golgi body
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Centrosome
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Nucleus
Nissl’s granules are present in
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Microglia
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Astrocytes
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Oligodendrocytes
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Neurons
Resting membrane potential is maintained by
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RBC
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WBC
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Both 1 and 2 above
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Nerve cells
Which one of the following does not act as a neurotransmitter?
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Hormones
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Neurotransmitters
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Ion pumps
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None of the above
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