Online Shiksha

By Savita S. More

CG Board Class 7 Science Control and Coordination in Living Organisms

 

What happens when your finger gets suddenly pricked?
a reflex action occurs, causing the finger to pull away involuntarily.

 

What are endocrine glands?
Endocrine glands are specialized organs that produce and release hormones directly into the bloodstream.

 

What are hormones?
Hormones are chemical substances produced by endocrine glands that regulate various physiological processes in the body.

 

Write the name and functions of any two plant hormones
Two plant hormones are auxins (promoting growth) and gibberellins (stimulating flowering and seed germination).

 

Write the function of an efferent nerve.
Efferent nerves transmit signals from the brain and spinal cord to muscles or glands, resulting in voluntary or involuntary actions.

 

What are sense organs?
Sense organs, including the skin, nose, ears, tongue, and eyes, receive external stimuli and transmit sensory information to the nervous system.

 

Why are endocrine glands called ductless glands?
Endocrine glands are called ductless glands because they release hormones directly into the bloodstream, rather than through ducts.

 

Write the functions of plant hormones?
Plant hormones regulate growth, development, and responses to environmental stimuli in plants, influencing processes like seed germination, flowering, and fruit development.

 

Class 7 Science Control and Coordination in Living Organisms

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