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प्रश्न
Explain the difference between of the following pair of terms :
receptor and effector
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उत्तर
| Receptor | Effector |
| A receptor is a cell (or a group of cells) present in a sense organ which is sensitive to a particular types of stimuli such as light, sound, smell, taste, heat and pressure. | An effector is a part of the body which can respond to a stimulus according to the instructions sent from the nervous system. |
| Eyes have light receptors; ears have sound receptors, etc. | Muscles and glands are examples of effectors. |
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संबंधित प्रश्न
State one function each of cerebellum and pons.
State whether coughing is a voluntary action or reflex action.
Give the functions of medulla.
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
Give the various functions of brain.
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
Which of the following statements is correct about receptors?
The olfactory receptors in humans are located in :
(a) eyes
(b) tongue
(c) ears
(d) nose
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sudden application of brakes of the cycle on sighting an obstacle in front
State whether the following is
Constriction of pupil
State whether the following is simple reflex, conditioned reflex or neither of the two.
Knitting without looking
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Solving mathematical sums
What type of reflex is the following?
Blinking of the eye
Complete the following sentence with appropriate Word
The control of reflex action is through:
Which one of the following is not a simple reflex?
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
 |
- Name the phenomenon shown in the figure and define the same.
- Identify the parts labelled as 1 and 2. Write one functional difference between these two.
- Name the bony protective covering and the membranous protective covering of the spinal cord.
- Label the guidelines 3 and 4.
- How is the labelled part 3 different from part 4 with respect to its composition (part of neuron)?
- Give the technical term for the point of contact between the two nerve cells.
- Name the fluid filled inside the central canal of spinal cord.
- Name the term used for a small gap between two neurons.
- Give one example of a neurotransmitter.
- Draw a neat diagram of a nerve cell and label the parts: Perikaryon, Node of Ranvier, Myelin sheath and Axon terminals.
