The bird evolved from meat dinosaurs so they couldn't taste the sweetness, only felt the taste of meat (umami). But some birds like hummingbirds, singing birds go against the South.0 of: 00/4: 57 namchim flies can detect the road in 1/4 second. Eost of the bird does not taste the sweetness , mammal species feel 5 tastes consisting of sweet, sour, bitter, salty and umani (delicious meat). On the tongue of mammals, such as humans, there are 4 types of taste including round papilla (foliate papillae), fungiform papillae (fungiform papillae) and papillae only (Filiform Papillae)
. Each papillae can contain from 5,000 - 10,000 sense buds. In fact, every part of the tongue can taste all 5 flavors. When the elderly man, some sense of shoots stop recessing periodically
Therefore, the elderly has only about 5,000 taste sense, so feeling the taste will weaken. A special point, spicy is not a taste. Scientists have named the official year that the tongue of many mammals can feel sweet, sour, bitter, salty and umani (delicious meat). While spicy is the pain signal, the nerves in the blade transmit signal to the brain, warns about hot, painful conditions. Many mammal species cannot feel enough five taste like their animals Cats and mammals live under the sea. However, most vertebrate species can feel the way because they own their gene tr1. The T1R1 and T1R3 couple help animals discover amino acids, organic compounds constituted the delicious taste. While the T1R2 and T1R3 couple detects the road to help the species feel the sweet taste. However, Ms. Maude Baldwin, a student at Harvard University discovered that the bird does not own the T1R2 gene so they cannot taste the road
This species still felt amino acids. Research the genome of 10 birds from chickens to hummingbirds, Baldwin explained, the reason that birds couldn't feel the sweetness because they evolved from meat dinosaurs. The diet of this species is rich in protein and amino acids but lacks sugar. Gradually, their T1R2 gene disappears. To birds, they absolutely do not have this gene, so they can't feel the sweetness. But there are still foreign flies with the trend of feeling the common taste of birds. Every day, they consume nectar numbers greater than their body weight. This species can detect the difference between water and sugar within 1/4 of seconds. Their tongue can operate 17 times in a second to taste food. The researchers found hummingbirds that felt weaker amino acids than other birds but reacted strongly to carbohydrates, making sweetness. Therefore, the T1R1 and T1R3 genes in hummingbirds have mutated, making them feel the road. This prize, researchers said that in the past hummingbirds have genome similar to birds Other, means they only feel amino acids. However, this bird often frequent flowers to catch insects and accidentally exposed to sweetness from nectar or in stagnant water. Gradually, their genome changes, helping them feel the sweetness better than the type. Research on hummingbirds have shown Maude Baldwin's interest in the taste of flying animals this. Continuing to study by the beginning of 2021, Baldwin and the researchers at the Institute of Max Planck found singing birds, containing more than 5,000 species such as Son Ca, Cardinal, Putting, I can feel the sweetness. This is not related to their diet. First, scientists studied a system of diet of birds. They discovered some of the songbirds that consume a large amount of nectar daily every day. This is related to the ancestors of singing birds living in Australia, the area has a natural condition suitable for these types. Flowers, fruit trees contain many sugars. Expanding, the researchers unexpectedly when many birds of singing birds do not eat dignity still like liquids with sweetness than water. To determine the origin of this ability, researchers have recreated Back to the T1R1 and T1R3 genome in the ancestor of the songbird, thereby finding them can feel good taste (umami). In particular, amino acids contain protein molecules that constitute the road. The signal detection of sugar in songbirds is formed higher, faster than other species. Thus, the ancestors of songbirds were able to feel the lines before they were bidering, flourishing across the planet. Therefore, whether individuals consume nectar, they are still able to feel sweet taste. Interesting things are differences in songbirds like Hoang Yen, Son Ca, coinciding with gene mutations In hummingbirds. Although, their tongue structure is not the same, they all develop the ability to taste the sweetness better than taste Amumi. Based on new discovery, scientists suspect that awareness of taste has extensive effects Go to the process of progress . Dịch vụ:
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