Describe the different biological functions of protein in our body.  

Different biological functions of protein in our body:--

1. Growth and Maintenance

Your body needs protein for growth and maintenance of tissues.

Yet, your body’s proteins are in a constant state of turnover.

Under normal circumstances, your body breaks down the same amount of protein that it uses to build and repair tissues. Other times, it breaks down more protein than it can create, thus increasing your body’s needs.

This typically happens in periods of illness, during pregnancy and while breastfeeding (1Trusted Source, 2Trusted Source, 3Trusted Source).

People recovering from an injury or surgery, older adults and athletes require more protein as well (4Trusted Source, 5Trusted Source, 6Trusted Source).

2. Causes Biochemical Reactions

Enzymes are proteins that aid the thousands of biochemical reactions that take place within and outside of your cells (7Trusted Source).

The structure of enzymes allows them to combine with other molecules inside the cell called substrates, which catalyze reactions that are essential to your metabolism (8Trusted Source).

Enzymes may also function outside the cell, such as digestive enzymes like lactase and sucrase, which help digest sugar.

Some enzymes require other molecules, such as vitamins or minerals, for a reaction to take place.

Bodily functions that depend on enzymes include (9Trusted Source):

• Digestion
• Energy production
• Blood clotting
• Muscle contraction

Lack or improper function of these enzymes can result in disease (10Trusted Source).

3. Acts as a Messenger

Some proteins are hormones, which are chemical messengers that aid communication between your cells, tissues and organs.

They’re made and secreted by endocrine tissues or glands and then transported in your blood to their target tissues or organs where they bind to protein receptors on the cell surface.

Hormones can be grouped into three main categories (11Trusted Source):

• Protein and peptides: These are made from chains of amino acids, ranging from a few to several hundred.
• Steroids: These are made from the fat cholesterol. The sex hormones, testosterone and estrogen, ______ __________ ___ ____ ___ ___ _______ ________.
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