NCERT Solutions For Class 11 Biology Chapter 22

NCERT Solutions Class 11 Biology Chemical Coordination and Integration

Ncert Solutions For Class 11 Biology Chapter 22 PDF Download

NCERT solutions class 11 biology chapter 22 chemical coordination and integration is one of the most common topics asked in class 11 examination. The NCERT solutions for class 11 biology chapter 22 chemical coordination and integration is provided here to help students develop their concepts on the topic. Not just Class 11, all NCERT solutions will help students to get thorough with the exam syllabus and the content for the exam with ease.

NCERT solutions class 11 chapter 22 biology specifically deals with chemical coordination and integration. Our body is a complex machine that has many thousands of processes and functions. These are regulated by hormones and enzymes that are released under certain conditions and situations. Not only humans and animals, but plants also use chemical messengers to coordinate certain functions and processes. These might tell the plants when to shed their leaves, when to change colours, or even grow new leaves. Similarly, chemicals play an important role in humans too – for instance, when an individual reaches puberty, a lot of chemicals are released depending if the individual is a male or a female. Let’s take a look at the below questions to understand more.

Q9: Match the following:

NCERT solutions for class 11 biology chapter 22 deals with chemical coordination and integration in organisms. Chemicals messengers such as hormones, and catalysts like enzymes affect various biological processes and functions in organisms. In humans, adrenaline is released when the body perceives threat. When this chemical is released in the body, muscles tighten up, glucose is released, eyes dilate, non-essential functions cease. This helps the body to analyse the threat and decide a course of action – it could either be running away or preparing to fighting to keep the threat at bay.

Besides this, there are other chemicals that perform various functions. The masculine features in a male are controlled by a chemical called testosterone. It promotes the growth of facial and chest hairs, bigger muscles, deeper pitch etc. Similarly, the equivalent chemical for feminine features is called estrogen. It promotes features that are characteristic of females such as regulation of reproductive system and secondary sex characteristics. A hormone called Oxytocin is responsible for social interaction and affection. It is released during touching and hugging and is often called the “love chemical.” Similarly, so many chemicals influence various biological activities in our body.

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