Class -X West Bengal Board. English Medium
Chapter - 1 (d) Response and physical coordination in animals - Nervous system.
Fill in the blank
1. _____________________ is the long processes of neuron.
2. ___________________ protects centre nervous system from mechanical shock.
3. The yellow spot situated in ___________of eye.
4. The meeting point of two neuron is ______________.
5. The process of modifying the focal length of the human eye lens as needed is called ________________.
6. The three layered covering of human brain is called _______________________.
7. The part of the eyeball controlling the diameter of pupil is ___________________.
8. Rod and cone sales are located in the ____________________ of eye.
9. The _____________________ of the eyeball absorbs excess light rays.
True or false
1. Hypothalamus helps to maintain body balance of human.
2. Choroid helps in the accomodation of eye by changing the curvature and shape of the lens.
3. Presbyopia occurs when the elasticity of the lens of the eye increases.
4. The hypothalamus is called the relay center of the brain.
5. Axoplasms contain neurofibril mitochondria and Nissle granules.
6. Acetylcholine and adrenaline are neurotransmitters.
7. A group of nerve cell's cell bodies outside the central nervous system is called a ganglion.
8. Dendrons transport stimuli and axon receives stimuli.
9. CSF is a type of modified tissue fluid.
10. Clear reflection is formed at the junction of retina and optic nerve.
11. Nissle granules found in axon of nerve cell.
12. The neurilemma of nerve cells separates in some places to form Ranvier's node.
13. Gray matter surrounds the neurocoel of the spinal cord
