Answer:
The correct answer is "There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include: multiple receptors for the same hormone, a single receptor coupled to different pathways and hormones interacting with receptors for other molecules".
Explanation:
Hormones are among the most versatile molecules of the body, responsible for different biological processes such as human growth, sex development and metabolisms. Hormones are responsible of these complex biological processes because they have drastically different effects in different cells. There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include:
- Multiple receptors for the same hormone. For instance, there are multiple receptor for dopamine, a hormone and neurotransmitter responsible for different functions such as movement, memory, sleep and motivation.
- A single receptor coupled to different pathways. Most hormone receptors act with a cascade of signaling. This in consequence results in a single receptor interacting with different molecules having multiple effects.
- Hormones interacting with receptors for other molecules. One example is the action of one metabolite of progesterone named allopregnanolone. This metabolite interacts with GABA-A receptor, which gives it anxiolitic properties.
Parrots and Dogs are able to generate internal heat to maintain their body temperature in a coid environment. Parrots and Dogs are Endotherms. They generate most of the heat they need internally, when it's cold outside.
Answer:
The smallest cell in humans is a sperm cell and the largest cell is the egg cell.
Explanation:
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1. 118
2. It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). synthetic elementlivermorium (Lv)
3.same number of valence electrons
4. 8 because it has full valence shell
5. Halogens are the compounds found in group 17 of the periodic table. They are all incredibly electronegative, meaning that they are very willing to take electrons from other atoms. Fluorine, for example, is the only element that can take electrons away from oxygen.
Alkali metals, on the other hand, are just the opposite: Their electronegativity is very low, meaning that they are very willing to give away electrons
Both groups are highly reactive.
6. atomic number is the number of protons
7. a Columb of elements in a periodic table
8. a row of elements in the periodic table
Answer: Ginkgo
Explanation:
There are 4 types of gymnosperms that produce fleshy fruits around their seeds which are usually considered as cones. These are Ginkgo, conifers, gnetophytes, and cycads. These plants have been evolved for fruit production as gymnosperms are known for their naked ovules and their seeds are stored in rough woody structure that is called as cone. There are separate males and female cones are present in gymnosperms.
Among the options given Ginkgo is the correct option it produces cones that look like berries. This advantageous evolution and helps in transfer of seeds through animals as they consume fruits or berries and disperse seeds in their feces.
