Expression of the Hox gene complex in the indirect development of
... appears primitive for bilaterian metazoans (5–7), the egg is divided up into blastomeres of more or less invariant lineage. Specification of given lineage elements depends on short-range interblastomere signaling occurring during cleavage, as well as on inherited consequences of the cytoarchitecture ...
... appears primitive for bilaterian metazoans (5–7), the egg is divided up into blastomeres of more or less invariant lineage. Specification of given lineage elements depends on short-range interblastomere signaling occurring during cleavage, as well as on inherited consequences of the cytoarchitecture ...
UNIT I
... climbs these substances, while pulling up the other water molecules due to cohesion. The meniscus, in a column of water, is formed because gravity pulls down on the water molecules in the center while water molecules at the sides of the container “climb.” Inhibition occurs when water moves into a su ...
... climbs these substances, while pulling up the other water molecules due to cohesion. The meniscus, in a column of water, is formed because gravity pulls down on the water molecules in the center while water molecules at the sides of the container “climb.” Inhibition occurs when water moves into a su ...
16-2 The Sympathetic Division
... o Exchange of ions and molecules between adjacent cells across gap junctions o Occurs between two cells of same type o Highly specialized and relatively rare Paracrine Communication o Uses chemical signals to transfer information from cell to cell within single tissue o Most common form of intercell ...
... o Exchange of ions and molecules between adjacent cells across gap junctions o Occurs between two cells of same type o Highly specialized and relatively rare Paracrine Communication o Uses chemical signals to transfer information from cell to cell within single tissue o Most common form of intercell ...
ANATOMY AND PHYSIOLOGY RELATED TO CLINICAL PATHOLOGY
... animal cell contains the following structures: nucleus, nucleolus, nuclear membrane, centrioles, endoplasmic reticulum, golgi apparatus, ribosomes, mitochondria, lysosomes, vacuoles, and the cell membrane (unit membrane). ...
... animal cell contains the following structures: nucleus, nucleolus, nuclear membrane, centrioles, endoplasmic reticulum, golgi apparatus, ribosomes, mitochondria, lysosomes, vacuoles, and the cell membrane (unit membrane). ...
GCSE Biology Specification (For teaching from 2016
... appreciate how the complex and diverse phenomena of the natural world can be described in terms of a small number of key ideas relating to the sciences which are both inter-linked, and are of universal application. These key ideas include: ...
... appreciate how the complex and diverse phenomena of the natural world can be described in terms of a small number of key ideas relating to the sciences which are both inter-linked, and are of universal application. These key ideas include: ...
MCAS 2010 February Biology Released ITems
... ■ Some fonts and/or font sizes may have been changed and/or reduced. ■ Some graphics may have been reduced in size from their appearance in student test booklets; however, they maintain the same proportions in each case. ■ All references to page numbers in answer booklets have been deleted from t ...
... ■ Some fonts and/or font sizes may have been changed and/or reduced. ■ Some graphics may have been reduced in size from their appearance in student test booklets; however, they maintain the same proportions in each case. ■ All references to page numbers in answer booklets have been deleted from t ...
Unit_1_revision_sheets
... Exam questions Gluten is a protein found in wheat. When gluten is digested in the small intestine, the products include peptides. Peptides are short chains of amino acids. These peptides cannot be absorbed by facilitated diffusion and leave the gut in faeces. Some people have coeliac disease. The ep ...
... Exam questions Gluten is a protein found in wheat. When gluten is digested in the small intestine, the products include peptides. Peptides are short chains of amino acids. These peptides cannot be absorbed by facilitated diffusion and leave the gut in faeces. Some people have coeliac disease. The ep ...
Ultrastructure of the body cavities in phylactolaemata Bryozoa
... thick ECM via hemidesmosomes. On each lateral side one peritoneal cell is located. These do not reside entirely on the ECM, but cover each one subperitoneal cell, which differs from the former in its cytoplasmic composition. The cytoplasm is electron-lucent, without conspicuous amounts of ribosomes ...
... thick ECM via hemidesmosomes. On each lateral side one peritoneal cell is located. These do not reside entirely on the ECM, but cover each one subperitoneal cell, which differs from the former in its cytoplasmic composition. The cytoplasm is electron-lucent, without conspicuous amounts of ribosomes ...
Be and look healthy from the inside out
... We believe that you do not need to take a supplement specifically sold as a source of Omega-3-6-9 because there are sufficient amounts of Omega-6 and Omega-9 in the vegetable oils that we use on a daily basis. ...
... We believe that you do not need to take a supplement specifically sold as a source of Omega-3-6-9 because there are sufficient amounts of Omega-6 and Omega-9 in the vegetable oils that we use on a daily basis. ...
Sec 1.4 Worms
... female individuals. --Other species have one individual with both male & female organs. -Some reproduce asexually by breaking into pieces. ...
... female individuals. --Other species have one individual with both male & female organs. -Some reproduce asexually by breaking into pieces. ...
CHAPTER 2 THE DIGESTIVE SYSTEM Animals, like plants, absorb
... lies a fine, subserous layer in which fat may appear, as in the appendices epi ploicae of the large gut. The muscle coat consists of two tubes, an outer thin longitudinal and an inner thick circular, separated from each other by enough areolar tissue to allow each tube some independent movement. Th ...
... lies a fine, subserous layer in which fat may appear, as in the appendices epi ploicae of the large gut. The muscle coat consists of two tubes, an outer thin longitudinal and an inner thick circular, separated from each other by enough areolar tissue to allow each tube some independent movement. Th ...
EXTRAEMBRYONIC MEMBRANE
... fetal erythrocytes are Rh-positive but the mother is Rhnegative, the mother’s body can form antibodies to the Rh antigen, which cross the placental barrier and destroy the fetus. The immunological memory of the mother’s immune system means this problem is much greater with second and subsequent preg ...
... fetal erythrocytes are Rh-positive but the mother is Rhnegative, the mother’s body can form antibodies to the Rh antigen, which cross the placental barrier and destroy the fetus. The immunological memory of the mother’s immune system means this problem is much greater with second and subsequent preg ...
Sierra College Bio 6 Human Physiology Lecture Outline
... 3. pH above 7 = basic d. Buffers - substances that resist pH change i. They accept H+ ions from the solution when they are in excess ii. They donate H+ ions to the solution when they are depleted III. ...
... 3. pH above 7 = basic d. Buffers - substances that resist pH change i. They accept H+ ions from the solution when they are in excess ii. They donate H+ ions to the solution when they are depleted III. ...
CLEP Biology - Problem Drill 15: Animal Function Question No. 1 of
... The spinal cord is not part of the brain. It is part of the central nervous system. C. Incorrect! The cerebellum is part of the brain. It is not the only one listed here. Feedback ...
... The spinal cord is not part of the brain. It is part of the central nervous system. C. Incorrect! The cerebellum is part of the brain. It is not the only one listed here. Feedback ...
PHS 201 - National Open University of Nigeria
... Microscopic anatomy deals with structures that cannot be seen without magnification. The limits of the equipment used determine the boundaries of microscopic anatomy. For example, with a light microscope, you can see basic details of cell structure; with an electron microscope, you can see individu ...
... Microscopic anatomy deals with structures that cannot be seen without magnification. The limits of the equipment used determine the boundaries of microscopic anatomy. For example, with a light microscope, you can see basic details of cell structure; with an electron microscope, you can see individu ...
The chemistry of living things 2. Atoms combine to form molecules
... All cells are small, because: o The total metabolic activities of a cell are proportional to its volume of cytoplasm, which is in effect its size o All raw materials, energy, and waste can enter or leave the cell only by crossing the plasma membrane o As objects get larger, their volume increases mo ...
... All cells are small, because: o The total metabolic activities of a cell are proportional to its volume of cytoplasm, which is in effect its size o All raw materials, energy, and waste can enter or leave the cell only by crossing the plasma membrane o As objects get larger, their volume increases mo ...
05-respiratory system
... Is derived from the • Somatic mesoderm. It lines the thoracic body wall. ...
... Is derived from the • Somatic mesoderm. It lines the thoracic body wall. ...
Part III
... have no roots and no way of water around in their bodies. Mosses will quickly suck up water like a sponge any time they get wet and their body allows them to hold on to the water for a long time. Their dependence on incidental moisture leads mosses to live in damp places; shady places are even bette ...
... have no roots and no way of water around in their bodies. Mosses will quickly suck up water like a sponge any time they get wet and their body allows them to hold on to the water for a long time. Their dependence on incidental moisture leads mosses to live in damp places; shady places are even bette ...
the human body
... Kidney filters up to 350 pints of water and solutes from the blood each day. Each kidney has more than 1 million small filtering units called nephrons, which process chemical wastes and excess water in the body, which then produces urine. If these nephrons were uncoiled and joined end to end, ...
... Kidney filters up to 350 pints of water and solutes from the blood each day. Each kidney has more than 1 million small filtering units called nephrons, which process chemical wastes and excess water in the body, which then produces urine. If these nephrons were uncoiled and joined end to end, ...
Biology High School Release Item Document MCAS 2014
... Historically, a significant portion of the elk population died each winter because winters in Yellowstone were long and very cold, with deep snow. Over the past 50 years the climate in Yellowstone has become warmer and snowfall amounts have decreased. More elk have been surviving the winters, but po ...
... Historically, a significant portion of the elk population died each winter because winters in Yellowstone were long and very cold, with deep snow. Over the past 50 years the climate in Yellowstone has become warmer and snowfall amounts have decreased. More elk have been surviving the winters, but po ...
Slide 1
... • Red blood cells are one of several types of blood cells • Each second, 3 million new red blood cells are formed by a special kind of mitosis • Red blood cells have no nucleus or organelles. They are just full of Hemoglobin (Hb) • Thus, Hb was one of the earliest proteins to be isolated and underst ...
... • Red blood cells are one of several types of blood cells • Each second, 3 million new red blood cells are formed by a special kind of mitosis • Red blood cells have no nucleus or organelles. They are just full of Hemoglobin (Hb) • Thus, Hb was one of the earliest proteins to be isolated and underst ...
for ICD-10
... Ciliated cells are columnar epithelial cells with specialized ciliary modifications. Ciliated cells are cells covered in tiny hair-like projections known as cilia. Cilia work by rhythmically moving back and forth in unison. These tiny projections allow the cell to move through liquid or mucus enviro ...
... Ciliated cells are columnar epithelial cells with specialized ciliary modifications. Ciliated cells are cells covered in tiny hair-like projections known as cilia. Cilia work by rhythmically moving back and forth in unison. These tiny projections allow the cell to move through liquid or mucus enviro ...
Upper respiratory tract infections
... propria) (Fig. 4a & 4b). The epithelium is tall columnar pseudostratified with cilia and goblet cells. The supporting lamina propria underneath the epithelium contains elastin, that plays a role in the elastic recoil of the trachea during inspiration and expiration, together with blood vessels that ...
... propria) (Fig. 4a & 4b). The epithelium is tall columnar pseudostratified with cilia and goblet cells. The supporting lamina propria underneath the epithelium contains elastin, that plays a role in the elastic recoil of the trachea during inspiration and expiration, together with blood vessels that ...
Cell theory
In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1838. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. Cell theory has become the foundation of biology and is the most widely accepted explanation of the function of cells.The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the most basic unit of life. All cells arise from pre-existing, living cells, by biogenesis.