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FrozenT [24]
3 years ago
9

When we are born, we have about how many brain cells?

Biology
2 answers:
Reil [10]3 years ago
5 0
When babies are born, their brains contain about a hundred billion of neurons. However, a few of these brain cells are connected. At age three, there are one thousand trillion connections formed. The brain starts to cut off unused connections at the age of eleven. 
mafiozo [28]3 years ago
4 0

Answer:

The correct answer will be- 100 billion brain cells or neurons

Explanation:

The development of brain starts after three weeks of conception in the womb and the brain cells called neurons starts developing in the brain.

The brain usually develops about 100 billion neurons at the time of birth with very few synapses about 2500 synapse per neuron. In the first few years, the number of neurons increases to trillions and the formation of synapses begins and reaches about 15000 synapses per neuron at the age of five.

Thus, 100 billion brain cells or neurons is the correct answer.

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1) Glycogen phosphorylase catalyzes the removal of glucose from glycogen. The ∆G°’ for this reaction is 3.1 kJ/mole 1. Calculate
Andru [333]

Answer:

1. G° = -RT ln (G1P/P)

3.1 = 8.314 × 310 × ln (G1P/P)

3.1 / 2577.34 = ln (G1P/P)

0.0012 = ln (G1P/P)

0.0012 = (log G1P/P)/log 2.71828

0.4342 × 0.0012 = log G1P/P

0.00052 = log G1P/P

G1P/P = 10^0.00052 = 1.0012

P/G1P = 1/1.0012 = 0.9988

2. The cleavage of glycogen phosphorolytically is beneficial for the cell to conduct the process as the discharged glucose is phosphorylated. A general hydrolytic cleavage would give rise to only a glucose, which has to be phosphorylated again with the help of ATP.  

Another merit of phosphorylated glucose is that it comprises the negative charge and cannot diffuse out of the muscle cell. Thus, the reaction will not be at equilibrium under the physiological conditions and always encourages the generation of the products. The formation of products will amend the change in free energy in such a manner that the reaction will always carry in the forward direction.  

3. Greater the ratio of [Pi]/[glucose-1-phosphate], higher will be the relative rate of glycogen phosphorylase in comparison to the phosphoglucomutase as the transformation of Glu-1-P becomes slow because of lesser accessibility of substrate.  

4 0
3 years ago
Two or more related lineages acquire a similar characteristic which is not found in a common ancestor. What are the structures c
motikmotik

Answer:

The correct option is D. analogous

Explanation:

We speak of an analogy when one structure is similar to another or has the same function, but whose embryonic development and its origin or ancestor is not common, they are different, in other words, they are analogous structures if they fulfill functions or acquire similar characteristics starting from the same medium, without requiring them to have the same evolutionary origin (they may or may not be similar structurally and embryologically).

3 0
3 years ago
11
Fittoniya [83]

Answer:

They flow out of the thylakoid , and give energy to a phosphate group.

Explanation:

3 0
3 years ago
Choose the definition of: invertebrates
slega [8]
<span>Invertebrates means having no backbone.</span>
7 0
2 years ago
3. A population of 820 insects lives in a 1.2-acre area. They gather nectar from a
katen-ka-za [31]

Answer:

The plants have the higher population density. This is because, when compared with that of the insects, the number of plant species per acre area is higher; 2800 compared to 683.3

Explanation:

The number of individual species per unit area of land is known as the population density. Population density describes how crowded or spaced out a given species is in a particular area. The higher the population density, the more crowded the species are and vice versa. The formula for calculating population density is given as:

Population density = Number of species/land area

Population density of the insects = 820/1.2 = 683.3 insects/acre

Population density of the plants = 560/0.2 = 2800 plants/acre

Therefore, the plants have the higher population density.

This is because, when compared with that of the insects, the number of plant species per acre area is higher.

3 0
2 years ago
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