CG Board Class 7 Science Control and Coordination in Living Organisms Textbook question answers , Fill in the blanks etc.
Which of the following are reflex actions :
a) Immediate removal of hand just after it touches a hot surface. {reflex]
b) Carrying a thing from one place to another.
c) Thinking before performing some task.
d) Amazed after a sudden blast
e) Trembling due to excessive cold. [reflex]
Fill in the blanks :-
a) Reflex action is controlled by __________.spinal cord
b) Nerve which takes the message to the brain is called _______ nerve.afferent
c) Touch is felt by ___________.skin
d) We grow in height due to ________ hormone.growth
e) Level of sugar in the blood is controlled by a hormone secreted by _________
gland.pancreas
f) _________ hormone is responsible for flowering in plants. Gibberellin
Match the following :-
Ovaries and testis —— Controls the level of sugar in blood
Pancreas —— Secondary sexual characters
Pituitary gland —— Plant hormone
Gibberellin —— Master gland
Ovaries and testis —— Secondary sexual characters
Pancreas —— Controls the level of sugar in blood
Pituitary gland —— Master gland
Gibberellin —— Plant hormone
Answer these :
Name the organs present in the nervous system of man.
The nervous system in humans consists of the brain, spinal cord, nerves, and sense organs.
What are efferent nerves?
Efferent nerves are responsible for carrying nerve impulses from the brain and spinal cord to various parts of the body, facilitating motor responses.
What are the functions of the nervous system?
The nervous system controls and coordinates various functions in the body, including sensory perception, motor responses, and the regulation of physiological processes.
Name a stimulus which you observe in your daily life.
A common stimulus is feeling heat when touching a hot surface.
