Advertisements
Advertisements
Question
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Options
Knee-jerk
Blinking of eyes due to strong light
Salivation at the sight of food
Sneezing when any irritant enters the nose
Solution
Salivation at the sight of food
APPEARS IN
RELATED QUESTIONS
Which part of the brain maintains posture and equilibrium of the body?
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the smell of the food?
Define reflex arc. Give the flow chart of a spinal reflex arc.
All the voluntary actions of our body are controlled by :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
The part of brain which takes part in regulating respiration in the human body is :
(a) medulla
(b) pons
(c) cerebellum
(d) cerebrum
When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our fingers. The receptor triggers and impulse in neuron Q which transmits the message to an organ R which is a part of the central nervous system. Here the impulse is passed on to a neuron S which in turn passes it to a yet another neuron T. The neuron T passes the impulse to a tissue U in our arm. The tissue U then contracts and pulls our hand away from the hot plate.
(a) What is the name of (i) receptor P (ii) neuron Q, and (iii) organ R?
(b) What is (i) neuron S, and (ii) neuron T?
(c) Name the tissue U.
(d) What name is given to the phenomenon in which hand is pulled away quickly from the hot plate?
(e) Name the effector in this whole process.
With the help of suitable example, describe reflex action.
Multiple choice question. Tick (✓) the correct choice:
Reflex actions occur under the control of
- brain
- medulla oblongata
- spinal cord
- cerebrum
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
