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Finger [1]
2 years ago
15

As an individual ages, new neurons and dendrites appear, but others atrophy. Compared to when they were adolescents, adults have

fewer neural connections and their brain size _____ as they continue to age.
Biology
1 answer:
attashe74 [19]2 years ago
3 0

The brain and central nervous system shrink as we age.

<h3>What happens to the brain when we age?</h3>

The brain is one of the most important organs in our body because all the nerve signals are produced there for our body to function.

In the brain we find nerve connections through neurons. A particular aspect of them is that during childhood and adolescence they multiply as we learn new things.

However, once we reach the stage of old age, these nerve connections deteriorate and are reduced, therefore, the size of the brain and the central nervous system decreases.

Learn more about brain in: brainly.com/question/11950231

#SPJ1

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The concentration of molecules or ions in a particular area as compared to another area is referred to as the concentration
Klio2033 [76]

Answer:

Concentration gradient

Explanation:

When the concentration of molecules and ions is compared to the concentration of ions and molecules in another area, the difference in the concentration will be called the concentration gradient.

The concentration gradient is the factor which determines the rate and direction of the molecules and ions in the environment which could be physical or biological.  

Thus, concentration gradient is the correct answer.

8 0
4 years ago
Suppose that the resistance between the walls of a biological cell is 7.0 × 109 Ω. (a) What is the current when the potential di
DIA [1.3K]

Answer:

Explanation:

Using Ohm's law

V ( voltage) = I (current A) × Resistance R in ohms

R = 7.0 × 10⁹Ω

V = 80 mV = 80 / 1000 = 0.08 V

0.08 V = I × 7.0 × 10⁹Ω

a) I = 0.08 V / 7.0 × 10⁹Ω = 1.142857 × 10 ⁻¹¹ A

b) quantity of charge = I × t = 1.142857 × 10 ⁻¹¹ A × 0.85 s = 9.7142857 × 10⁻¹² C

number of Na⁺ ions ( q = +e) = 9.7142857 × 10⁻¹² C / 1.6 × 10⁻¹⁹ C = 60714285.714 Na⁺ ions

7 0
4 years ago
Some leukocytes absorb entire ___ by the process of phagocytosis.
SCORPION-xisa [38]

Answer:

Bacteria

Explanation:

Leucosomes are the white blood corpuscles or WBCs which is come out to protect the body from bacteria and other infections.

6 0
4 years ago
Assume that the sequence of bases in one strand of DNA molecule is a GACTTACGTACC what is the sequence of complementary bases in
iren2701 [21]
Answer: CTGAATGCATGG
5 0
3 years ago
The energy animals need for their life functions is released when their cells carry out which of the following functions
Vlad [161]

Cellular respiration

Explanation:

The energy animals need for their life functions are released when their cells carry out cellular respiration.

Cellular respiration is a metabolic process by which living organisms breaks down organic molecules using oxygen  especially glucose to produce energy and gives off carbon dioxide and water in the process.

It is the reverse of photosynthesis.

During this process, chemical energy stored in food substances are released and converted to heat energy.

The process takes place in the mitochondria of a cell.

learn more:

Respiration brainly.com/question/5895241

#learnwithBrainly

5 0
3 years ago
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