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Chemical Coordination & Integration PPT Biology Class 11

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Coordination of 
activities in humans
Nervous  
system
Endocrine  
system
Page 2


Coordination of 
activities in humans
Nervous  
system
Endocrine  
system
NervousSystem
? Transmits electrical 
impulses
? Use the neurons to 
transmit the signal
? Signal transmission is 
fast
? Effect is localized
EndocrineSystem
? Transmits chemical 
biological messengers 
Impulses
? Use the circulatory 
system to transmit the 
signal
? Signal transmission is 
slow
? Effect is widespread
NervousSystemvsEndocrineSystem
Page 3


Coordination of 
activities in humans
Nervous  
system
Endocrine  
system
NervousSystem
? Transmits electrical 
impulses
? Use the neurons to 
transmit the signal
? Signal transmission is 
fast
? Effect is localized
EndocrineSystem
? Transmits chemical 
biological messengers 
Impulses
? Use the circulatory 
system to transmit the 
signal
? Signal transmission is 
slow
? Effect is widespread
NervousSystemvsEndocrineSystem
Endocrine glands are called
ductless glands.
They secrete hormones. 
Hormones are non-nutrient 
chemicals act as intercellular
messengers.
They are produced in trace
amounts.
Page 4


Coordination of 
activities in humans
Nervous  
system
Endocrine  
system
NervousSystem
? Transmits electrical 
impulses
? Use the neurons to 
transmit the signal
? Signal transmission is 
fast
? Effect is localized
EndocrineSystem
? Transmits chemical 
biological messengers 
Impulses
? Use the circulatory 
system to transmit the 
signal
? Signal transmission is 
slow
? Effect is widespread
NervousSystemvsEndocrineSystem
Endocrine glands are called
ductless glands.
They secrete hormones. 
Hormones are non-nutrient 
chemicals act as intercellular
messengers.
They are produced in trace
amounts.
H U M A N E N D O C R I N E S Y S T E M
Pituitary Gland
Pineal Gland
Thyroid Gland 
Parathyroid Gland 
Thymus Gland 
Adrenal Gland 
Pancreas
Gonads (Testis & Ovary)
Page 5


Coordination of 
activities in humans
Nervous  
system
Endocrine  
system
NervousSystem
? Transmits electrical 
impulses
? Use the neurons to 
transmit the signal
? Signal transmission is 
fast
? Effect is localized
EndocrineSystem
? Transmits chemical 
biological messengers 
Impulses
? Use the circulatory 
system to transmit the 
signal
? Signal transmission is 
slow
? Effect is widespread
NervousSystemvsEndocrineSystem
Endocrine glands are called
ductless glands.
They secrete hormones. 
Hormones are non-nutrient 
chemicals act as intercellular
messengers.
They are produced in trace
amounts.
H U M A N E N D O C R I N E S Y S T E M
Pituitary Gland
Pineal Gland
Thyroid Gland 
Parathyroid Gland 
Thymus Gland 
Adrenal Gland 
Pancreas
Gonads (Testis & Ovary)
?Location - Below the thalam us
&  just above the brainstem
? It synthesizes and secretes certain
neurohormones.
?These hormones regulate the  
synthesis and secretion of pituitary 
hormones.
?T wo types of hormones are
produced by hypothalam us:
Releasing Hormones
Inhibiting Hormones
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FAQs on Chemical Coordination & Integration PPT Biology Class 11

1. What is chemical coordination in the human body?
Ans. Chemical coordination refers to the process by which different glands in the body secrete hormones that regulate various physiological functions. These hormones are responsible for communication between different organs and tissues, ensuring proper integration and coordination of bodily processes.
2. Which glands are involved in chemical coordination?
Ans. The major glands involved in chemical coordination are the endocrine glands. These include the pituitary gland, thyroid gland, adrenal glands, pancreas, ovaries (in females), and testes (in males). Each of these glands secretes specific hormones that regulate different bodily functions.
3. How do hormones work in chemical coordination?
Ans. Hormones are chemical messengers that are released by the endocrine glands into the bloodstream. They travel to specific target cells or organs and bind to specific receptors on these cells. This binding triggers a series of biochemical reactions within the cells, leading to the regulation of various physiological processes.
4. What are the effects of hormonal imbalance in chemical coordination?
Ans. Hormonal imbalance can have significant effects on the body. It can disrupt normal bodily functions and lead to various health issues. For example, an overproduction or underproduction of certain hormones can disrupt metabolism, growth, reproduction, mood regulation, and immune function.
5. How can hormonal imbalances be treated in chemical coordination?
Ans. The treatment of hormonal imbalances depends on the specific condition and underlying cause. It may involve hormone replacement therapy, medications to regulate hormone levels, lifestyle modifications, and sometimes surgery. A thorough evaluation by a medical professional is necessary to determine the appropriate treatment approach.
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