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Mice21 [21]
3 years ago
7

The p wave of a normal electrocardiogram indicates ________.

Biology
1 answer:
Olegator [25]3 years ago
7 0
The answer is atrial depolarization. The P wave of a normal electrocardiogram specifies atrial depolarization.  In addition, depolarization happens in the four compartments of the heart which is both atria first and in both ventricles. The sinoatrial or as called as SA node on the wall of the right atrium starts depolarization in the right and left atria that can cause the contraction in which it is symbolized by the P wave on an electrocardiogram.
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humans developed antibiotics to fight bacterial infections however some antibiotics are no longer effective in killing the bacte
Lapatulllka [165]

Answer:

Changes in genetic makeup occurs with the passage of time.

Explanation:

Antibiotic cause mutation in the bacteria which allowed to develop resistance in the bacteria. This resistance and change in the genetic makeup obeys the theory of evolution which states that all species are changed gradually with the passage of time. The genetic makeup of bacteria also changes with the passage of time and attain resistance due to regular application of antibiotics so due to this resistance, the antibiotic can't work on the bacteria.

3 0
3 years ago
Two test tubes are filled with a solution of bromthymol blue. A student exhales through a straw into each tube, and the bromthym
AlekseyPX

Explanation:

The plant is utilizing CO2 in photosynthesis

Photosynthesis produces glucose and O2 from inorganic CO2, light energy and water.

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Bromothymol blue, an acid indicator, goes from blue to yellow when reacting with acid. The color change in sunlight  confirmed the use of CO2, dissolved within the solution as carbonic acid- its removal from the solution makes the more basic, and the solution goes from yellow (acidic) to blue (alkaline).

CO2 + H2O ↔ H2CO3

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released.

Occuring in several complex steps, photosynthesis is a rate limited reaction, it depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. Water supplies chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II.

Additionally,

  • water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ions and produces molecules of the energy storage molecule ATP through an electron transport chain.
  • This occurs in the thykaloids, where pigment molecules like chlorophyll reside.
  • Later, in dark reactions, NADP and NADPH are used in the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules. These store energy in their bonds, which can be released in respiration in the mitochondria.

In all eukaryotic cells mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’s cycle via the oxidization of pyruvate( through the process of glycoysis). The electron transport chain, in which oxygen functions as the terminal electron acceptor occurs in both plants and animals.

Learn more about photosynthesis at brainly.com/question/4216541

Learn more about cellular respiration at brainly.com/question/11203046

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0
3 years ago
Most living things need oxygen to survive. These two body systems bring oxygen into your body and then move to all your body par
Inga [223]

Answer:

Respiratory system and circulatory system.

The respiratory system allow living things to obtain oxygen from the air while the circulatory system allows oxygen to be carried around the body.

6 0
3 years ago
Why is genetic variation important in a population?
Ymorist [56]
Its important because it tells us the difference between populations and individuals
8 0
3 years ago
What is a famous historical incident for a tsunami
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Lisbon Portugal has had one of the worst
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