Protein synthesis in neuron is carried out directly by:
1. | cell body | 2. | neurofibrils |
3. | Nissl body | 4. | myelin sheath |
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The most common neurotransmitter in the body is:
1. serotonin
2. GABA
3. acetylcholine
4. adrenaline
An opioid peptide produced in the brain, especially in the pituitary gland, that blocks the sensation of pain is:
1. substance P
2. beta-endorphin
3. nicotine
4. neuropeptide
The type of neuron seen in the retina of human eye are:
1. bipolar
2. unipolar
3. multipolar
4. sensory
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The peripheral nervous system in humans PNS consists of cranial nerves and:
1. spinal cord
2. sensory nerves
3. the brain
4. spinal nerves
Blood brain barrier formation is the function of:
1. microglia
2. Schwann cell
3. astrocyte
4. oligodendrocytes
The neuron in humans with many nerve fibers arising from its cell body and that carries impulses to the effectors would be called as:
1. | multipolar | 2. | bipolar |
3. | unipolar and sensory | 4. | multipolar and motor |
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The regulation of the composition of cerebrospinal fluid is the function of:
1. astrocytes
2. oligodendrocytes
3. microglia
4. ependyma
All the following statements regarding nerve impulse conduction are correct except:
1. Myelinated neurons have a higher conduction velocity than unmyelinated neurons.
2. Nerve impulses occur in an all-or-none manner.
3. The neuron cannot be stimulated during the depolarization phase.
4. The strength of impulses carried along a single nerve fiber can vary with the strength of their stimulus.
The neurotransmitter responsible for sleep induction and mood stabilization is:
1. GABA
2. acetylcholine
3. serotonin
4. dopamine