All categories

3 years ago

What is peristalsis and where does it occur?

2 answers:

6 0

Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.

Firdavs [7]3 years ago

4 0

Stomach muscles contracting

You might be interested in

The large artery that receives blood from the left ventricle and distributes it to the rest of the body is called the

Elis [28]

Answer: Aorta

Explanation: The aorta is the largest artery in the body. It carries oxygenated blood from the left ventricle of the heart into systemic circulation. The aorta has many subdivisions that branch off into smaller arteries.

7 0

4 years ago

Suggest two reasons why more of our fish are supplied by fish farming rather than from traditional

Arlecino [84]

Answer:

Due suitable environment and high productivity.

Explanation:

More fish are supplied by fish farming rather than from traditional because farms are build in order to harvest more fish by providing suitable environment to the fish. In transitional ways, fish are caught in nets from the rivers by local people for theirselves and the extra will sold in the market. In rivers there are less number of fish which does not meet the requirements of people so that's why commercial farming of fish can be done.

4 0

3 years ago

How do I figure out how to find the nucleus

monitta

Answer:

The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number. On the periodic table, the atomic number is the number of protons, and the atomic mass is the mass number.

5 0

3 years ago

Read 2 more answers

Which is an accurate description of an equinox? A. the greatest distance from the sun in a planet’s orbit B. the time at which e

yuradex [85]

The answer is D. a day with an equal amount of daylight and darkness

altho truly it would be a day that there is 12 hours exactly between sunup and sundown because there is light for more than just the 12 hours in between

8 0

3 years ago

What would happen to the concentrations of ATP, NADPH and Sugars if PSII stopped working?

dezoksy [38]

Answer:

1. ATP - decrease

2.NADPH - decrease

3. sugars - decrease

And True- Both ATP and NADPH are needed to make sugars.

Explanation:

Photosynthesis is a form of biosynthesis that produces glucose from the reactants; it uses energy from sunlight, along with carbon dioxide and water. It happens in the chloroplast in two phases; the light-dependent and dark reactions. In the light reaction, solar energy stimulates photosystems, formed from pigments like chlorophylls.

Chlorophyll forms photosystems of proteins known as complex proteins (PS I & PSII). PS II absorbs and moves the reaction center with light energy.

H+, and oxygen, are formed from a water molecule as it's broken apart.
From photosystem II, electrons are transferred to photosystem I.
ATP is synthesized from ADP along with inorganic phosphate.
To form NADPHH, H+ is added to NADP

If PS II no longer works, there will be less ATP, NADPH, (both used later on) and no sugars produced.

In the dark reaction, products of the light reaction are used to make sugars. Here, in the Calvin cycle, the enzyme, RuBisCO, catalyzes the fixation of CO2 with Ribulose 1,5-bisphosphate (RuBP).

7 0

3 years ago