Diffusion‚ Osmosis‚ Active Transport There are two ways in which substances can enter or leave a cell: 1) Passive a) Simple Diffusion b) Facilitated Diffusion c) Osmosis (water only) 2) Active a) Molecules b) Particles Diffusion Diffusion is the net passive movement of particles (atoms‚ ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration of substances is uniform throughout. Some major examples of diffusion
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Introduction The Schistocephalus solidus parasite was discovered and isolated from the cold areas of the Eastern and Western regions of North America (Poulin‚ 2000). This parasite is also common in the areas of Canada‚ Europe‚ and Eurasia. Schistocephalus solidus is a cestode that has been established to infect over 400 different types of bird species (Barber and Scharsack‚ 2010). The different types of the bird’s species form the definitive hosts of the parasite. Schistocephalus solidus is also known
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transform from a shy lonely “amoeba” to “Sophie La Fuerta‚” part of a tightly knit “organism.” Readers are drawn to the main character Sophie as she gains confidence‚ learns important life lessons‚ and falls in love. Being so different from everybody Sophie gets loads of attention that she doesn’t know how to handle without being afraid. At the beginning of the book Sophie is definitely not the kind of girl that likes to meet new people. Sophie calls herself an “amoeba” because she feels like an outsider
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inflammation‚ ulcers‚ and tumours of the stomach‚ oesophagus and duodenum. Endoscopy also allows the taking of biopsies (small tissue samples) which help in determining a diagnosis. Biopsies can help in detecting infections such as Helicobacter and Giardia. Biopsies are also used in detecting Coeliac disease and Lactase
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months. Microscopic examination of her urine sample showed numerous‚ flagellated‚ pear-shaped trophozoites. Treatment was promptly given upon receipt of the lab result. 1. 2. 3. 4. What particular parasite infected the patient? Briefly describe this parasite. What is the mode of transmission of this parasite? What other signs and symptoms can you observe on the patient with this parasitic infection? Give treatment options for this patient. CASE FILE 2 A college student is experiencing painful eye
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book all falls on epidemiology‚ also known as the study of patterns‚ causes‚ and effects that disease and health conditions have on certain populations. McNeill’s writing shows how the relationship that mankind‚ referred to a macroparasites‚ and parasites‚ referred to as microparasites‚ have made an impact on the world through history. The relationship at first during existence was said to be “balanced”‚ but when mankind in Africa started to leave trees and become hunters‚ spread into new lands‚ and
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belong? i) Bat ii) Cycas iii) Plasmodium iv) Mosquito Q 23 To which phyla do the following animals belong? 2 marks i) Toad ii) Cockroach iii) Hydra iv) Earthworm Q 24 Rewrite the following names correctly‚ if incorrect. i) amoeba histolytica ii) Brassica Campestris iii) brassica Capitata iv) ALTHAEA ROSEA Q 25 Pick the odd one out and justify your choice by giving reasons. (i) Amphibia‚ Reptilia‚
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Punjab Univ. J. Zool.‚ Vol. 22 (1-2)‚ pp. 01-06‚ 2007 HELMINTH PARASITES OF SOME FRESHWATER FISHES MUHAMMAD SHAFIQ AHMED‚ TAHIR IQBAL‚ AMJAD MAHMOOD‚ MUHAMMAD GULZARIN AND MUHAMMAD ABID Department of Zoology‚ University of the Punjab‚ Quaid-e-Azam Campus‚ Lahore-54590 (MSA‚ MA); Department of Zoology‚ University of Azad Jammu & Kashmir‚ Muzaffarabad (TI‚ AM‚ MG)‚ Pakistan. Abstract: Forty-three freshwater fishes (Heteropneustus fossilis 11‚ Mystus vittatus 16 and Channa striatus 16) were collected
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. . . a nest of parasites hanging from the neat sunlit town‚ eating its substance‚ giving no nourishment back. Yet to K lying idle in his bed‚ thinking without passion (What is it to me‚ after all? he thought)‚ it was no longer obvious which was host and which parasite‚ camp or town. If the worm devoured the sheep‚ why did the sheep swallow the worm? What if there were millions‚ more millions than anyone knew‚ living in camps‚ living on alms‚ living off the land‚ living by guile‚ creeping away in
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What Is Protozoa? Protozoa are one of the three main classes of parasites that cause diseases in humans. They are single-celled organism‚ and can only be seen under a microscope. When they invade a human they are able to multiply easily‚ which causes them to be at a great advantage and puts humans at a disadvantage. This helps them survive in the human body and causes a serious infection even with the arrival of a single protozoon. Infections caused by protozoa are contagious. Those protozoa
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