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1 year ago

9. why do mammalian muscle cells perform lactic acid fermentation (instead of, say, ethanol fermentation)?

1 answer:

Crank1 year ago

8 0

Alcoholic fermentation and indeed most forms of fermentation are low-energy producing. The waste products are often medium-sized hydrocarbons/alcohols that, when fully oxidized to carbon dioxide provide more energy.

Cells ferment sugars to lactic acid B. During training. This is why your muscles are sore and sore during exercise. Essentially, building this lactic acid causes your muscles to scream for oxygen and use a simplified fermentation process to meet their energy needs, which is not efficient at all.

Yes, animals will ferment for a short time if they are not supplied with enough oxygen. Humans perform lactic acid fermentation when the body urgently needs a lot of energy. If you sprint as fast as you can, your cells only have a few seconds of ATP stored. When stored ATP is depleted, muscles begin to produce ATP through lactic acid fermentation.

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Checking for contents of the intestinal tract would be done during which phase of the autopsy?

klio [65]

Answer: B. dissection

Autopsy or postmortem is a medical examination of human body that is performed to know the cause, manner and duration since death. The autopsy involves complete examination of the body. The external examination gives indication of situation of the body : number of injury, color changes due to the affect of poisons. Internal examination gives indication of condition of organ in the body of deceased. For a complete internal examination dissection is required. Autopsy is complete when all four cavities like cranial, thoracic, abdominal and pelvic are open through dissection, which allows the assessment of organs present in these cavities. Opening of the intestinal cavity will give a way to assess the intestine, which can be dissected to know the contents present in it.

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4 years ago

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AQUATICS SCIENCE please help me

WITCHER [35]

Explanation:

Meri class 8 I only have science not aquatic science

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3 years ago

1. The atrioventricular valves permit blood flow:

gayaneshka [121]

Answer:

1. A) in one direction only.

2. B) pulmonary valve.

Explanation:

The heart consists of four cavities: two atria (upper cavities) and two ventricles (lower cavities). Blood passes through a valve before leaving each cavity of the heart. The valves prevent the backward flow of blood. Actually, the valves are fins (leaflets) that act as single-way blood inlets on one side of the ventricle, and as single-way blood outlets on the other side of the ventricle. Normal valves have three fins (leaflets), except the mitral valve, which only has two.

The four valves of the heart are the following:

• The tricuspid valve controls blood flow between the right atrium and the right ventricle.

• The pulmonary valve controls blood flow from the right ventricle to the pulmonary arteries, which transport blood to the lungs to oxygenate it.

• The mitral valve allows oxygen-rich blood from the lungs to pass from the left atrium to the left ventricle.

• The aortic valve allows oxygen-rich blood to pass from the left ventricle to the aorta, the largest artery in the body, which transports blood to the rest of the body.

As the heart muscle contracts and relaxes, the valves open and close, allowing blood flow to the ventricles and atria alternately. The following step-by-step illustration explains the normal operation of the left ventricle valves:

- When the left ventricle relaxes, the aortic valve closes and the mitral valve opens. This allows blood to flow from the left atrium to the left ventricle.

- When the left atrium contracts, more blood flows to the left ventricle.

- When the left ventricle contracts again, the mitral valve closes and the aortic valve opens so that blood flows to the aorta.

<em>When we talk about atrioventricular valves, it means tricuspid valves and the mitral valve</em>

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4 years ago

Select the correct statement about chemical energy, a term used by biologists to refer to potential energy available for release

vekshin1

Answer:

A photosynthetic cell within a plant leaf produces chemical energy, stored within glucose molecules.

Explanation:

The energy captured from sunlight by Photosystems in chlorophyll is used to split a water molecule and reduce carbon dioxide to carbohydrates. This energy from sunlight is therefore stored in the chemical bonds of the glucose molecules. It is thereafter harnessed during cellular respiration when the chemical bonds of glucose are broken and the energy transferred to make ATP molecules.

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3 years ago

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Specialized structures that perform cell functions are ? a. organelles b. animal cells c. plant cells d. prokaryotes

Fed [463]

Specialized structures that perform cell functions are organelles.

What are cell organelles?

An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.

An organelle is a particular sort of cell structure. Organelles come in many different varieties. Vesicles are another name for organelles in a cell. They actually serve a purpose that is crucial since all of the processes in a cell must be compartmentalized. Therefore, a membrane is required to surround the processes inside a cell that produce diverse products. Organelles are therefore all membrane-bound in reality. They also distinguish between one function and another. So, for instance, the lysosome breaks down large molecules to make small molecules, while the mitochondrion produces energy by breaking down large molecules.

They must be divided up since the lysosome requires an acidic pH and the mitochondrion relies on all of its pathways, proteins, and enzymes to convert one chemical to another. Additionally, none of the functions would be created if those two substances were combined.

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2 years ago