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प्रश्न
What is the need for a system of control and coordination in an organism?
उत्तर
An organism has various organs that must be carefully controlled and coordinated for its survival. In the body, various fluids are secreted from the endocrine system's glands. These hormones are responsible for the overall growth and development of an organism. The central nervous system (CNS) controls all other daily decisions, including voluntary and involuntary actions.
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संबंधित प्रश्न
Write the names and functions of three parts of human nervous system in which it is divided.
Draw a flow chart to show the classification of the nervous system into various parts.
Name two systems which taken together perform the functions of control and coordination in human beings.
Write one word in the space provided to complete the second pair of the related words pertaining to nervous system.
Memory : cerebrum : : breathing :
Balance : cerebellum : : reasoning :
Multiple choice question. Tick (✓) the correct choice:
The brown pigment melanin is present in ____ of skin.
- Epidermis
- Fat cells
- Dermis
- Hair follicles.
State whether the following statement is true (T) or false (F):
The dermis of the skin is made up of epithelial cells.
State whether the following statement is true (T) or false (F):
Retina is present on the outer surface of the eye.
Draw a labelled diagram to show the structure of skin.
Fill in the blank:
Basic structural unit of the nervous system is the ..................
Define the following:
Motor neuron:
Match the terms of column I with those of column ll
| Column l | Column ll |
| (i) Lens | (a) Adjustment of light rays |
| (ii) Lachrymal gland | (b) Vision |
| (iii) Olfactory epithelium | (c) Secretion of tear |
| (iv) Cochlea | (d) Balance of the body |
| (v) Semicircular canal | (e) Hearing |
| (vi) Eyes | (f) Smell |
Define the following:
Nerve impulse
Where is this located?
Effector organs
Answer the following question:
What is a reflex action? Explain it with two examples.
Name the parts (a) to (e) in the following diagram.
What is the term given to the sequence of events occurring in the diagram?
Name the following:
The dorsal root ganglion of the spinal cord contain cell bodies of which type of neurons.
Complete the following sentence with appropriate word :
Tympanic chamber is filled with _________.
Short answer question
Give a reason - Injury to medulla oblongata may prove fatal.
Which is the ninth cranial nerve in humans?
What is the function of the red nucleus?
