Advertisements
Advertisements
प्रश्न
What is spinal cord? What is its main function?
Advertisements
उत्तर
The spinal cord is a part of the central nervous system. It is a cylindrical structure enclosed by a bony cage called the vertebral column. It is responsible for spinal reflex actions and the conduction of nerve impulses to and from the brain.
APPEARS IN
संबंधित प्रश्न
With the help of a neat and labelled diagram, describe reflex arc.
Which of the following is not a natural reflex action?
A. Knee-jerk
B. Blinking of eyes due to strong light
C. Salivation at the sight of food
D. Sneezing when any irritant enters the nose
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
What are the various sense organs in our body?
Write the names of the regions in hindbrain. Give one function of each region.
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
Which of the following statements are true?
(i) sudden action in response to something in the environment is called reflex action
(ii) sensory neurons carry electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
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?
what do we refer to in the nervous system when we say:
Natural and conditioned …………………
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
State whether the following is simple reflex, conditioned reflex or neither of the two:
Blushing: ……………….
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.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Knitting without looking
State whether the following is
The sudden application of brakes without thinking
What type of reflex is the following?
Knitting and swimming
Give Technical Term:
The scientist, who conducted experiment on a dog to show conditioned reflex
Differentiate between Voluntary and involuntary actions.
Reflex arc allows the rapid response of the body to a stimulus.
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
