Homework 1 Question 2. Phagocytosis is when larger solid particles are taken into the cell by being surrounded by the plasma membrane and passing through. Endocytosis is when smaller more soluble particles are taken in by the plasma membrane forming a sort of hole and then the hole is pinched off containing the smaller particles turning into a vesicle which is taken where it needs to go. Question 5. A scientist might choose light-microscopy over electron microscopy because you can use living
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(chemosynthesis theory) • Oparin formulated the theory that the conditions of earth contained all the necessary chemicals combined with electrical storms and Distinguish between prokaryotic and eukaryotic cells. Eukaryotic have membrane-bound organelles. Can be single or multicellular organisms. Prokaryotic do not, therefore the DNA is in the cytoplasm. Prokaryotic are unicellular organisms Explain why fossilization is a rare event It is a process that happens over thousands of years, and
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good role model and to hone the minds of the young ones. A cell has a purpose. It has to covert the food that we eat into energy. To covert this, a cell contains organelles (little organs) with specialized functions. As a teacher, my purpose is to ensure that learning takes place in my classroom. My pupils are my organelles and I take on the responsibility to make them functional and productive. There may be times that I become frustrated if I don’t meet my expectations after the lesson, but
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A. 38 year old male. Smokes, hypertension, family history of heart disease and a poor diet with increase weight gain. All of these factors contributed to his clogged arteries. His clogged arteries blocked blood flow and oxygen to the cells. Without oxygen the cells couldn’t produce ATP or energy to perform their functions. B. Passive and active processes. Waste builds up in the cell. Water, oxygen and glucose along with other important nutrients aren’t able to enter the cell. C. ER-wouldn’t
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because it is not regulated, things like calcium can’t be moved now so the body will start to calcify and have other problems. C): Basically all the intracellular organelles have membranes except ribosomes, so if the membranes started to break down then the whole cell in turn would not be capable of functioning. None of the organelles would be able to carry out their functions. D): They are both carried within the cell in the DNA which is inside the nucleus. It has the predisposition within
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Part 2: Different tissues of the Body Part 2: Different tissues of the Body Epithelial Cells: Squamous Cells: Squamous epithelial cells are thin and flat, this allows them to have a large surface area that is exposed to the lumen on two sides, one is the apical surface and the other is the basement membrane. The cells have a larger elliptically-shaped nuclei meaning the nucleus is flat and thin instead of round like they are in other cells (plant and animal cells), and the squamous cell
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McDonnell 1. The major differences between prokaryotes and eukaryotes are as follows; prokaryotes are much smaller than eukaryotes, prokaryotes have a nucleoid instead of a nucleus (which eukaryotic cells have), prokaryotes lack a membrane bound organelles while eukaryotes have them, prokaryotes are bacterial cells while eukaryotes can be considered the building blocks of plant and animal life. 2. A. A nucleus is basically the “brain” of a cell. It controls reproduction and contains the genetic information
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Bacterial and eukaryotic chromosomes are similar and different in many aspects. They both contain DNA, which is compacted into a chromosome. Specifically looking at anchoring proteins, coiling and methods of compaction they are quite different. I will begin with anchoring proteins which are found in both organisms. Anchoring proteins are also known as scaffolding proteins which are proteins that help an enzyme get within a close vicinity of the substrate. When looking at both bacteria and eukaryotes
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Extending Human Life One Chip at a Time COM 172 March 21, 2012 Dr. Yvette Irizarry Extending Human Life One Chip at a Time How long would you like to live? It is undeniably that scientists and technology are predestined to mend and prolong people natural lifespan expectancy. This, due to the emergence and advancements of a new technology era with highly specialized medical doctors, along with; biologists and bioengineers, electronics, chemists and chemical engineers, physicists, and mechanical
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Lysosomes are membranous “bags”, which appear in a variety of sizes, containing powerful digestive enzymes. Each lysosomes is enclosed by a membrane that sustains an acidic environment. They can be found in all eukaryotic cells and act as the cells’ “demolition site” as they are capable of digesting macro molecules, old cell parts, microorganisms and most foreign substances that enter the cell. The enzymes contained in the lysosomes are formed by ribosomes and are then packaged by the Golgi apparatus
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