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D) Regulate its growth
- Diabetes is related to this gland. [ ]
10th Class Biology 5th Lesson Coordination – The Linking System InText Questions and Answers
10th Class Biology Textbook Page No. 95
What helps us to respond to such signals?
There is a sequence of events that bring about responses. They start from detecting changes in environment.
Why does the living body respond to such signals?
The ability to react to particular stimulus in a particular situation must be of great importance in ensuring the survival of the organism.
10th Class Biology Textbook Page No. 96
What did Galen conclude after his observations?
After the observations of his patient, Galen a Greek physiologist concluded that nerves were of two types – those of sensation and those of action.
Why do you think Galen drew such a conclusion?
According to Galen the blow in the neck of his patient had damaged the nerves of sensation but had not affected its action. Then Galen concluded that nerves were of two types.
10th Class Biology Textbook Page No. 98
Which organ of our body was the detector and which was the effector in Activity -1?
In Activity -1, Eye was the detector and fingers were the effector.
What do you think that the information carried on the afferent and efferent nerves?
The information carried by afferent nerve is “scale is falling”.
The information carried by the efferent nerve is “to hold the scale”.
10th Class Biology Textbook Page No. 99
What other effectors would act under these circumstances?
- Withdraw our hands, when our fingers touch a hot object.
- Closing eyes when bright light is focussed on eyes.
- We sneeze when something enters the nose.
- We cough when inhaled dust or some other circumstances.
What does this tell us about the association nerves?
The sensory nerves in the spinal cord makes connections with other neurons in the grey matter. These neurons are called association neurons or interneurons. The association neurons process the information and generate responses.
10th Class Biology Textbook Page No. 100
Think of any action and try to make a sketch of reflex arc.
10th Class Biology Textbook Page No. 102
According to you what would be the function of the spinal cord?
Functions of the spinal cord :
- Spinal cord sends information received from different parts of the body to brain.
- Also it sends the information to various parts received from brain.
- Spinal cord also play a major role in reflex actions.
Are all functions of our body under direct control of the brain and spinal cord? Why do you think so?
Yes. All the functions of our body are under direct control of the brain and spinal cord. The 43 pairs of peripheral nervous system associated with brain and spinal cord plays an important role in disposing our body functions.
10th Class Biology Textbook Page No. 103
Which root according to you gets signals from afferent nerves?
The dorsal root of the spinal cord gets signals from afferent nerves.
What do you think the end of these nerves act at the muscular end?
At the ends of these nerves can involuntarily control several functions of regions like internal organs, blood vessels, smooth and cardiac muscles and is called an autonomous nervous system. It has voluntary control of muscles of some areas of skin and the skeletal muscle.
10th Class Biology Textbook Page No. 104
To which organs of the body do the nerves go from the ganglions near the vertebral column?
The organs like heart, lungs, stomach, intestines, urinary bladder, kidneys, hand fingers of the body, the nerves go from the ganglions near the vertebral column.
10th Class Biology Textbook Page No. 105
What are the organs that receives nerves starting from the brain?
Eye, mouth, tongue, salivary glands are the organs receives nerves starting from the brain.
Which are the organs whose activities are influenced by the sympathetic nervous system?
Eye – pupil, heart, lungs, blood vessels, sweat glands, digestive tract, kidneys, penis are the organs influenced by the sympathetic nervous system.
Which are the organs whose activities are influenced by the parasympa