Cell Structure chapt04
... • Cell movement takes different forms: • Crawling is accomplished via actin filaments and the protein myosin ...
... • Cell movement takes different forms: • Crawling is accomplished via actin filaments and the protein myosin ...
viruses-bacteria-int..
... ____ 19. Which of the following might be found in the cytoplasm of a bacterial cell? a. chloroplasts c. mitochondria b. Golgi bodies d. DNA ____ 20. Bacterial endospores a. occur where there is plenty of available food. b. allow certain species to survive harsh environmental conditions. c. are simil ...
... ____ 19. Which of the following might be found in the cytoplasm of a bacterial cell? a. chloroplasts c. mitochondria b. Golgi bodies d. DNA ____ 20. Bacterial endospores a. occur where there is plenty of available food. b. allow certain species to survive harsh environmental conditions. c. are simil ...
Chapter 1 The Scope of Biology
... of only one cell are unicellular (bacteria) • Organisms consisting of more than one cell are multicellular (dogs, trees, humans) ...
... of only one cell are unicellular (bacteria) • Organisms consisting of more than one cell are multicellular (dogs, trees, humans) ...
Anatomy of Bacteria
... prefers an environment devoid of oxygen but has adapted so that it can live and grow in the presence of oxygen” • Facultative Anaerobes: “a microorganism that prefers an oxygen environment but is capable of living and growing in its absence” – E.g. Bacillus anthracis, Corneybacterium ...
... prefers an environment devoid of oxygen but has adapted so that it can live and grow in the presence of oxygen” • Facultative Anaerobes: “a microorganism that prefers an oxygen environment but is capable of living and growing in its absence” – E.g. Bacillus anthracis, Corneybacterium ...
Passive transport
... Diffusion: Movement of molecules from an area of high to low concentration Movement continues until equilibrium is reached Equilibrium: same amount of molecules on the outside of a cell as the inside ...
... Diffusion: Movement of molecules from an area of high to low concentration Movement continues until equilibrium is reached Equilibrium: same amount of molecules on the outside of a cell as the inside ...
8D Unicellular Organisms
... Unicellular organisms can only grow to a certain size. If the organism is too big, it cannot get enough of the substances it needs throughout the cell because diffusion is too slow. The tissues in multicellular organisms need to have raw materials transported to them because diffusion would be too s ...
... Unicellular organisms can only grow to a certain size. If the organism is too big, it cannot get enough of the substances it needs throughout the cell because diffusion is too slow. The tissues in multicellular organisms need to have raw materials transported to them because diffusion would be too s ...
Cell Parts and Functions
... Short-lived & are formed and recycled as needed Supply energy to the cell Bean shaped & contain inner folded membrane Perform cellular respiration – burning of sugars to make cellular energy (ATP’s) Fluid filled sac used for storage of materials Animals – many small vacuoles Plants – o ...
... Short-lived & are formed and recycled as needed Supply energy to the cell Bean shaped & contain inner folded membrane Perform cellular respiration – burning of sugars to make cellular energy (ATP’s) Fluid filled sac used for storage of materials Animals – many small vacuoles Plants – o ...
I. Student misconceptions
... would produce each combination. Such questions will be more likely to reveal misunderstandings, both to students themselves and to their instructors. Active learning techniques are crucial with this topic. The majority of students will not fully understand meiosis after reading the text, listening t ...
... would produce each combination. Such questions will be more likely to reveal misunderstandings, both to students themselves and to their instructors. Active learning techniques are crucial with this topic. The majority of students will not fully understand meiosis after reading the text, listening t ...
Ch 7.3 notes big
... G. Osmotic Pressure 1. Osmosis exerts a pressure known as osmotic pressure on the hypertonic side of a selectively permeable membrane. 2. Because the cell is filled with salts, sugars, proteins, and other molecules, it will almost always be hypertonic to fresh water. 3. If so, the osmotic pressure s ...
... G. Osmotic Pressure 1. Osmosis exerts a pressure known as osmotic pressure on the hypertonic side of a selectively permeable membrane. 2. Because the cell is filled with salts, sugars, proteins, and other molecules, it will almost always be hypertonic to fresh water. 3. If so, the osmotic pressure s ...
WHAT IS “ALIVE?” – Living or Nonliving
... Make observations of living things and their environment using the five senses. Identify the major parts of plants, including stem, roots, leaves, and flowers. Differentiate between living and nonliving things. ...
... Make observations of living things and their environment using the five senses. Identify the major parts of plants, including stem, roots, leaves, and flowers. Differentiate between living and nonliving things. ...
Human dendritic cell differentiation from monocytes
... stratified squamous epithelia of the epidermis and mucosae. LCs express CD1a, langerin/CD207, E-cadherin and have intracytoplasmic Birbeck granules. We wonder if the PPAR (peroxisome proliferator activated receptor)-gamma stimulation can give rise to LCs in vitro starting from CD14+ monocytes, as oc ...
... stratified squamous epithelia of the epidermis and mucosae. LCs express CD1a, langerin/CD207, E-cadherin and have intracytoplasmic Birbeck granules. We wonder if the PPAR (peroxisome proliferator activated receptor)-gamma stimulation can give rise to LCs in vitro starting from CD14+ monocytes, as oc ...
Resting Membrane Potential
... rapidly influx down its concentration gradient. The sudden in-rush of positive sodium ions reverses the membrane potential for a few milliseconds. Then the voltage-gated K+ channels open, allowing K+ to rapidly efflux due to its concentration gradient. This brings the membrane back to negative i ...
... rapidly influx down its concentration gradient. The sudden in-rush of positive sodium ions reverses the membrane potential for a few milliseconds. Then the voltage-gated K+ channels open, allowing K+ to rapidly efflux due to its concentration gradient. This brings the membrane back to negative i ...
U1L5Vocab
... 6. Diffusion: movement of molecules from an area of high concentration to an area of lower concentration 7. Osmosis: diffusion of water through a semi-permeable membrane. Type of passive transport 8. Active transport: using the cell’s energy to move particles from an area of lower concentration to a ...
... 6. Diffusion: movement of molecules from an area of high concentration to an area of lower concentration 7. Osmosis: diffusion of water through a semi-permeable membrane. Type of passive transport 8. Active transport: using the cell’s energy to move particles from an area of lower concentration to a ...
Lesson Plans
... has to have plenty of surface area per unit volume. Similarly, movement of wastes out of cells also requires adequate surface area. Adequate surface area can be achieved in two ways: by small size alone or by shapes that have a high surface area-to-volume ratio. Thus, individual cells are small. In ...
... has to have plenty of surface area per unit volume. Similarly, movement of wastes out of cells also requires adequate surface area. Adequate surface area can be achieved in two ways: by small size alone or by shapes that have a high surface area-to-volume ratio. Thus, individual cells are small. In ...
Homeostasis and Cell Transport
... Plant roots are typically always in a hypotonic environment. This is important to the survival of the organism. Water moves into the roots by osmosis and the cells swell (where is the water stored?) When it fills with water, the cell membrane swells and pushes up against the cell wall; this pressure ...
... Plant roots are typically always in a hypotonic environment. This is important to the survival of the organism. Water moves into the roots by osmosis and the cells swell (where is the water stored?) When it fills with water, the cell membrane swells and pushes up against the cell wall; this pressure ...
Cancer Pathophysiology
... Normal cells rely on positive growth signals from other cells Cancer cells can reduce their dependence on growth signals by:1,2 - Production of their own extracellular growth factors - Overexpression of growth factor receptors - Alterations to intracellular components of signalling pathways - ...
... Normal cells rely on positive growth signals from other cells Cancer cells can reduce their dependence on growth signals by:1,2 - Production of their own extracellular growth factors - Overexpression of growth factor receptors - Alterations to intracellular components of signalling pathways - ...
How Cells Maintain Homeostasis
... – Non-polar – do NOT like water – Point to the middle of the plasma membrane. ...
... – Non-polar – do NOT like water – Point to the middle of the plasma membrane. ...
Chapter 1: Single-celled Organisms and Viruses
... When scientists first discovered bacteria, they were able to filter it out of liquids by using a sieve. ...
... When scientists first discovered bacteria, they were able to filter it out of liquids by using a sieve. ...
Dynamic Cell, Exploring Organelle Function (PowerPoint)
... You take 3 cross-town buses to get back to the lab and see what happened with Frany. Barbi has you come over to take a look in the microscope at the blood cells. What you see is a lot of RBCs, a lot of small pepper-like dots, moving all over the place, and a few large, round cells. You figure the ...
... You take 3 cross-town buses to get back to the lab and see what happened with Frany. Barbi has you come over to take a look in the microscope at the blood cells. What you see is a lot of RBCs, a lot of small pepper-like dots, moving all over the place, and a few large, round cells. You figure the ...
Cell Transport - Ms. Nevel's Biology Website
... What happens with a barrier? (like a cell membrane) 0 If solutions on either side of the barrier have the same ...
... What happens with a barrier? (like a cell membrane) 0 If solutions on either side of the barrier have the same ...
Cell Membrane PPT
... What happens with a barrier? (like a cell membrane) 0 If solutions on either side of the barrier have the same ...
... What happens with a barrier? (like a cell membrane) 0 If solutions on either side of the barrier have the same ...
Mitosis
Mitosis is a part of the cell cycle in which chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus. In general, mitosis (division of the nucleus) is often followed by cytokinesis, which divides the cytoplasm, organelles and cell membrane into two new cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of an animal cell cycle—the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell.The process of mitosis is divided into stages corresponding to the completion of one set of activities and the start of the next. These stages are prophase, prometaphase, metaphase, anaphase, and telophase. During mitosis, the chromosomes, which have already duplicated, condense and attach to fibers that pull one copy of each chromosome to opposite sides of the cell. The result is two genetically identical daughter nuclei. The cell may then divide by cytokinesis to produce two daughter cells. Producing three or more daughter cells instead of normal two is a mitotic error called tripolar mitosis or multipolar mitosis (direct cell triplication / multiplication). Other errors during mitosis can induce apoptosis (programmed cell death) or cause mutations. Certain types of cancer can arise from such mutations.Mitosis occurs only in eukaryotic cells and the process varies in different organisms. For example, animals undergo an ""open"" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi undergo a ""closed"" mitosis, where chromosomes divide within an intact cell nucleus. Furthermore, most animal cells undergo a shape change, known as mitotic cell rounding, to adopt a near spherical morphology at the start of mitosis. Prokaryotic cells, which lack a nucleus, divide by a different process called binary fission.