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प्रश्न
What are the various sense organs in our body?
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उत्तर
There are five sense organs in our body. They are the eyes, the ears, the nose, the tongue and the skin.
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संबंधित प्रश्न
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
Name two parts of the body which contain receptors of chemical stimuli.
What is spinal cord? What is its main function?
A cell (or group of cells) in a sense organ which is sensitive to a particular type of stimulus is called :
(a) interceptor
(b) effector
(c) receptor
(d) acceptor
The part of brain which controls the involuntary action such as heart beat, breathing, blood pressure, etc. is :
(a) pons
(b) medulla
(c) cerebrum
(d) cerebellum
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
Give one example of a conditioned reflex in your own life.
Explain the following term :
Conditioned reflex
What type of reflex is the following?
Solving mathematical sums
What type of reflex is the following?
Blinking of the eye
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
Differentiate between Voluntary and involuntary actions.
Which one of the following is not a simple reflex?
Which of the following is not an involuntary action?
Which sensory organ is involved in vertigo (sensation of oneself or objects spinning around)?
What kind of reflex is cycling?
Why have reflex arcs evolved in animals?
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
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- 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.
