Advertisements
Advertisements
Question
Give the various functions of brain.
Advertisements
Solution
The various functions of the brain are as follows:
(i) It receives information-carrying nerve impulses from all the sensory organs of the body.
(ii) It responds to the impulses brought in by the sensory organs by sending instructions to the muscles and glands making them function accordingly.
(iii) It correlates the various stimuli from different sense organs and produces the most appropriate and intelligent responses.
APPEARS IN
RELATED QUESTIONS
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
Which part of the eye contains cells which are sensitive to light?
Give the functions of medulla.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
What is a reflex action? Explain with the help of an example.
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
Which of the following helps in maintaining posture and balance of the human body?
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
A cylindrical structure P in our body begins in continuation with medulla and extends downwards. It is enclosed in a bony cage Q and surrounded by membranes R. As many as x pairs of nerves arise from the structure P. The structure P is involved in the reflex actions of our body and conduction of nerve impulses to and from another organ S of our body with which it forms CNS.
(a) Name the structure P.
(b) Name (i) bony cage Q, and (ii) membranes R.
(c) How much is x?
(d) Name the organs S.
(e) What are the reflexes involving structure P only known as?
Your are driving your bicycle at a fast speed. Suddenly, a small boy comes in front of your cycle and, without wasting any time in thinking, you immediately apply the brakes and accident is avoided. What name is given to such an action?
State whether the following is simple reflex, conditioned reflex or neither of the two.
Contraction of eye pupil
Give one example of a conditioned reflex in your own life.
Explain the following term :
Conditioned reflex
State whether the following is
Blinking
Reflex actions are mediated through ____________.
Which of the following is not involved in Knee-jerk reflex?
If after cutting through dorsal root of a spinal nerve of a mammal, the associated receptor in skin was stimulated the animal would ______.
Which sensory organ is involved in vertigo (sensation of oneself or objects spinning around)?
