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Delicious77 [7]
2 years ago
14

What difference between slow twitch and fast twitch muscle fibers relates most to their difference in function?

Biology
2 answers:
Tema [17]2 years ago
4 0

"B" is the correct answer

gulaghasi [49]2 years ago
3 0

Answer:

B. Slow twitch fibers contain more mitochondria than fast twitch fibers.

Explanation:

The slow-twitch muscle has a characteristic red color, this is because is rich in myoglobin and mitochondria. Also is dense in capillaries. It uses an oxidation reaction involving oxygen and fat or carbohydrates. This fibers contract with little force but for long periods.

The fast-twitch muscle has great strength but can only hold it for short periods. It is called white muscle because is less dense in mitochondria and myoglobin and work with anaerobic reactions.

The muscles in your body are a mixture of both types.

Taking into consideration all this, A, C, and D are false, and B is true.

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ammals that live in the Arctic Ocean have a large amount of blubber, which is a fatty tissue just beneath the skin. Which statem
frosja888 [35]
The arctic environment is deathly cold, hence the thick blubber on animals so they can handle freezing temperatures
4 0
3 years ago
Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp m
kodGreya [7K]

Answer:

A mutation in Ras protein which will cause hyperactivity will eventually lead to cancer.

Explanation:

Ras protein was first discovered in Rous sarcoma virus (RSV) and it is a proto-oncogene product. In normal conditions, it plays an important role in cellular signalling but in case of gain of function/hyperactivity it gets converted into cellular oncogene. In several types of cancers a point mutation has been reported in Ras protein.

Just like G protein, it is also a GTPase switch protein but unlike G protein which is trimeric, it is monomeric. In the plasma membrane, it is attached with the help of lipids like prenyl or palmitoyl groups. During signal transduction pathway when it gets activated, it downstream activates MAPK pathway and causes gene expression but when it gets hyperactivated it causes over expression of genes leading to cancer.

4 0
2 years ago
Any pollutant<br> released directly into the<br> environment
Lina20 [59]

Answer:

i think it is gas from cars

Explanation:

hope this helps

3 0
1 year ago
Give the role of air in an ecosystem
Radda [10]

Sustain Life and Growth

Air consists one of the main life-sustaining gas called oxygen. Almost all living things breathe in and breathe out this air. Nitrogen and Carbon dioxide are also other gases that are vital for plants and their growth.

Combustion

Apart from this, air supports burning or combustion. The oxygen present in air help in burning of the fuels to basically carry out activities like cooking food, running industries and vehicles as well as generating heat and electricity.

Temperature Control

Another important aspect of air is that it helps in maintaining the temperature on the earth surface by circulating hot and cold air. Air acts as a conductor of heat as well. Even phenomena such as water cycle are dependent on air.

Supplier of Energy

Air which consists of energy is one of the main suppliers of energy. Living things are made up of cells and these cells extract oxygen within the blood to produce energy usually in the form of ATP. This biochemical generation of ATP is essential to maintain life on the earth.

Photosynthesis

Carbon dioxide, which is a component of air is used by plants during the process of photosynthesis. Here oxygen is also released by plants. And we already know how vital oxygen is.

3 0
1 year ago
Read 2 more answers
When studying pea plants, Gregor Mendel made many interesting discoveries and came to a few conclusions about what happens as a
Art [367]

Answer:

The options have been placed in the comment section. The answer is C. Inheritance of genes from both parents

Explanation:

Gregor Mendel is referred to as the FATHER OF GENETICS due to his immense contribution to the discovery of how traits are passed down or inherited from parents to offsprings. He found out that a unit of inheritance, which was later called GENE, was responsible for each individual trait of pea plants.

In his numerous experiments, Mendel discovered that the characteristics/traits of pea plants were determined by the contribution of both parents. Mendel hypothesized that each parent contributed 50% of this unit of inheritance via fertilization to the characteristics of an offspring. Hence, the inheritance of genes from both parents determines the characteristics of a pea plant.

6 0
2 years ago
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