Advertisements
Advertisements
Questions
Define the following:
Reflex action
Define the following term:
Reflex action
Define reflex action.
Solution
Reflex action is an automatic/quick/immediate, involuntary action in the body brought about by a stimulus. This mechanism prevents injury to the body by triggering a rapid and automatic response.
APPEARS IN
RELATED QUESTIONS
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:
1) Name the phenomenon that is depicted in the diagram. Define the phenomenon.
2) Give the technical term for the point of contact between the two nerve cells.
3) Name the parts numbered 1, 2 and 3.
4) How does the arrangement of neurons in the spinal cord differ from that of the brain?
5) Mention two ways by which the spinal cord is protected in our body.
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
What is spinal cord? What is its main function?
Give the functions of medulla.
Write the names of the regions in hindbrain. Give one function of each region.
The involuntary actions in the body are controlled by :
(a) medulla in forebrain
(b)medulla in hindbrain
(c) medulla in spinal cord
(d) medulla in midbrain
The olfactory receptors in humans are located in :
(a) eyes
(b) tongue
(c) ears
(d) nose
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
Complete the following statement by choosing the correct alternative from the choice given in bracker:
Reflex action is controlled by
(i) brain (ii) spinal cord
(iii) autonomic (iii) peripheral nervous system
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
Two hungry boys (A and B) enter a restaurant and find a table decorated as follows:
Boy B starts salivating but not A. Explain the reason for this difference.
List in tabular form two differences between reflex action and walking.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Knitting without looking
What type of reflex is the following?
Sweating in summer
What type of reflex is the following?
Solving mathematical sums
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.
Given alongside is a partial diagrammatic representation of a certain phenomenon pertaining to the nervous system.
![]() |
- Name the parts numbered 1-7.
- Name the phenomenon that the diagram depicts and define it.
- Give the technical term for the point of contact between two nerve cells.
- Name the parts not shown in the diagram that should be included to complete the pathway of the phenomenon.