Gas Exchange : Oxygen Consumption Of The Embryo Essay

Gas Exchange : Oxygen Consumption Of The Embryo Essay

Length: 1835 words (5.2 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

3. Interference with gas exchange. Oxygen consumption of the embryo is low. This type of dormancy is still unresolved.
4. Retention of inhibitors. Seed coat prevent the escape of inhibitors from the seed.
5. Inhibitor production. Seed coat and pericaps may contain relatively high concentration of growth inhibitors
Embryo dormancy refers to a dormancy that is inherent in the embryo and is not due to any influence of the seed coat or other surrounding tissues. It thought to be due to the presence of inhibitors as well as absence of growth promoters. The loss of embryo dormancy is often associated with a sharp drop in the ratio of ABA (inhibitor) and GA (promoter) (Taiz, n.d.). Breaking coat-imposed dormancy seed depens on seed type. Some seeds require a period of cold (chilling), some must pass through animal’s digestive tract to become scarified some must go through process of after-ripening, defined as metabolic changes that must take place in a seed in order for it to overcome dormancy (Environment, n.d.). The most critical factor for seed germination is water. It is essential for enzyme activation, and the use of reserve storage material. In terms of temperature, there is minimum, optimum, and maximum temperature at which germination will occur. Oxygen is required for seed germination, concentration of carbon dioxide higher than 0.03% retard germination, nitrogen gas has no influence (McDonald, n.d.) Seed germination can be divided into three main phases:
1. Activation. This phase starts with imbibition, the uptake of water by the seed and increase in seeds volume. Respiration increases, and various enzymes involved in digestion are manufactured. The cells of the embryo begin to elongate, and the radicle begins to grow.
2. Dige...

... middle of paper ...

...rane pulls away from the cell wall. This process called plasmolysis, causes the plant to wilt and can be lethal to the cell and the plant. (pearson) High sodium levels also disrupt the chemi¬cal and physical composition of soil clays. As a result, the soil surface has low permeability to air, rain and irrigation water. The soil is sticky when wet but forms hard clods and crusts upon drying. This type of soil is called sodic soil. (soiltesting) Higher concentration of salt in soil has negative effect on seeds germination, plants growth and plants life span. Unnecessery fertilization, irrigation water with high concentration of salt, over use of salts on our roadways negatively affects agricultural plans on field and also to plants alongside the roads. It’s our responsibility to minimize the effect we have on our environment, keep the diversity of plants we have.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Essay on The Effects of Teratogens on an Unborn Embryo

- Childbirth is nothing short of a miracle. The placenta—the organ connecting a developing fetus to the uterine wall and allowing for waste elimination, nutrient uptake and gas exchange via the mother's blood supply—filters most harmful substances that threaten an embryo, though some may still pass on to the fetus. These harmful substances, called “teratogens,” range from environmental chemicals to the passing of maternal diseases, and can negatively impact the normal developmental cycle of a fetus....   [tags: fetus development, substance abuse]

Better Essays
1035 words (3 pages)

Heating Exchange For Gas Exchange Essay

- Opercular pumping is a mechanism utilized by certain fish for gas exchange. An opercular pump is used to pump water through the gills in an almost continuous unidirectional flow (SHSU). A dual pump is used in tandem in order to drive the unidirectional flow, both a buccal cavity and opercular cavity work simultaneously. The oral valve along the buccal cavity opens, allowing an influx of water. This influx of water causes an expansion of the opercular cavity, dropping the pressure (Hall). Water then enters into the opercular cavity and flows out due to opercular cavity compression....   [tags: Blood, Oxygen, Viscosity, Turbulence]

Better Essays
2156 words (6.2 pages)

A Short Note On The And Gas Exchange Essay

- Gas exchange in mammals takes place in the lungs which are internally located within the chest cavity. The lungs are sac-like organs which play one of the main roles in the respiratory system. To begin with, air is breathed in through the nose and mouth. This process of taking air into the system is called inspiration or inhalation. When mammals inhale, their external intercostal muscles contract and the diaphragm (arched set of muscles between thorax and abdomen) located beneath the lungs also contracts, and moves down....   [tags: Respiratory system, Blood, Oxygen, Mucus]

Better Essays
1788 words (5.1 pages)

Interventions For Improving Their Gas Exchange Essay

- There are many interventions I used to help my patient through this difficult time with her diagnosis of CHF and to increase her perfusion. The first set of interventions helps the patient by improving their gas exchange. The first intervention was to apply supplemental oxygen prescribed by the health care provider to make sure that the patients oxygen saturation is at least 90 percent or better. The second intervention was preforming coughing and deep breathing exercises. This is important because it helps with improving oxygenation and preventing a collapse lung from happening....   [tags: Blood, Heart, Artery, Myocardial infarction]

Better Essays
1503 words (4.3 pages)

Essay on Internal Transport and Gas Exchange

- ... The inferior vena cava is the vein that transports blood from the lower half of the body, or areas of the body that are below the diaphragm, into the heart (Clinic, 2014). The heart is split into two pumps that are located right next to each other. Each pump works a single blood circuit. The left side of the heart is the systemic circuit and the right side of the heart is the pulmonary circuit. The pulmonary circuit is the blood route that takes the blood from heart to the lungs. Once the exchange of gases is complete in the lungs, the blood is pumped out of the lungs into the left side of the heart....   [tags: blood, circulatory system, nutrients, oxygen]

Better Essays
1502 words (4.3 pages)

Essay about Human Circulation And Gas Exchange

- Human Circulation and Gas Exchange The human body requires a constant supply of materials like water, nutrients and oxygen to the billions of cells that help the body to function properly. As cells do their job they produce waste material which has to be taken out of the body. For this to be possible different systems of the human body need to work together. This assignment will describe the internal and external structure of the heart and explain how different systems of the body work together to maintain healthy cells....   [tags: Blood, Heart, Red blood cell, Bone marrow]

Better Essays
2332 words (6.7 pages)

The Gas Consumption And Pollution Essay

- America and the rest of the world has become dependent on fossil fuels to run and power our cities. The oil consumption and pollution has created serious issues such as holes in the ozone layer, which has lead to warmer winters and even warmer summers. The time to change our oil consumption is now. We need an alternative fuel that will benefit the environment and also make the world less dependent on oil. The solution is hydrogen fueled vehicles. Hydrogen vehicles create no pollution and they are quiet....   [tags: Hydrogen vehicle, Fuel cell, Hydrogen economy]

Better Essays
2263 words (6.5 pages)

Essay Penn West Is An Oil And Natural Gas Production Company

- Penn West is a pretty interesting company. Though it may be suffering through many problems, some investors are being recommended to invest in this company. I’d like to talk about this company and the difficult situation it’s in. At the end I think you should decide whether investing in this company would be worth it. Before we start anything I think it would only make sense if I gave some background information about this company. Penn West is an oil and natural gas production company in Canada....   [tags: Petroleum, Natural gas, New York Stock Exchange]

Better Essays
1536 words (4.4 pages)

Essay about Biology and the Properties of Gas Exchange Surfaces

- Properties of Gas exchange surfaces Alveolus – Air sac in the lungs • Hundreds of thousands in lungs • Increase lungs SA SA:V ratio = Surface area Volume Diffusion 0.5 cm cube – 2mm cubed of non dyed agar 1cm cube – 5mm cubed of non dyed agar 2cm cube – 18mm cubed of non dyed agar DIFFUSION IS QUICKER WITH SMALLER SA’s Alveoli are so small. • Diffusion is fast - blood capillary nearby • Thin walls (alveoli and capillary) (one cell thick) • Numerous Alveoli – Increases SA of Lungs (Each alveolus is small for quick diffusion) • Lots of blood capillaries next to alveoli • LUNGS = EFFICIENT GAS EXCHANGE SA = rate of diffusion Difference in concentration gradient = Rate of di...   [tags: biology, science experiments, ]

Better Essays
1223 words (3.5 pages)

Essay on Notes On The Foreign Exchange Market

- When I started this paper, I had a very limited understanding of the foreign exchange market, and I also had a limited understanding of the economy and currencies. My first step was learning most of the terms that are commonly used in the foreign exchange market. Next, I needed to learn some of the techniques that are used to analyze the market’s behavior. This paper has provided me with a wealth of knowledge, more so than the average business student and it has afforded me with a tremendous advantage in the world’s most liquid market, Forex....   [tags: Foreign exchange market, United States dollar]

Better Essays
2296 words (6.6 pages)