1. 1) Light microscopes can magnify an thing to be seen 400-1000 times. Microscopes that allow electron can magnify up to two million times. This allows scientists to see things in more detail such as skin cells, this consequence has given doctors and researchers more understanding and function. Light microscopes use a noticeable light that bends and goes by through the lens. Electron microscopes use a beam of electrons for light magnification. Electron microscopes allow higher magnification in comparison to a light microscope, this then allows a eye-sight in internal structure. Electron is the particle having a negative fee and then orbiting the nucleus, the circulation of electrons in the conductor of electricity. Image resolution is when a image can be recorded, or produced. This is indicated in per unit. To calculate the length of an object that is magnified. You will find the distance of the thing equals the distance of the object after it's been magnified then separate by the magnification. Electron microscopes can be quite expensive. They desire a constant supply of voltage, this then must be always secure, monitored and managed throughout. This machine is synthetic and can make errors. Only skilled people may use it, without these pro cations the reading may not be appropriate.
2. 1) The cell wall membrane is positioned in and around the plasma membranes of different types of skin cells. Cell wall structure function is to aid protect and allow water, skin tightening and to diffuse in and out of the cell. Plant life have cell wall surfaces while animal cells do not. Cell walls are made up of carbohydrates, they give shape to the cell. They help plants keep there shape and allow these to stand straight. The cell wall structure provides protection against pathogens and other substances that maybe bad for the cell.
The cell membrane is inside the cell wall. In a canine it is in the outside layer and holds and gives safeguard, also controls motion of materials in and out of the cell. Additionally it is a barrier between your cell and the cells environment but also retains homeostasis.
The nucleus is positioned in all skin cells except prokayotes. The condition is large and oval. The nucleus contains one or sometimes more nucleoli and holds DNA. The nucleus controls the activities in the cell and also contains hereditary material situated in the cell.
The cytoplasm is located in all cells. It is a clear jelly material. The cytoplasm contains organelles in the cell set up. The cytoplasm has three components, the organelles, cytosol and cytoplasmic inclusions. The cytosol is in part of the cytoplasm, it contains cytoskeleton, molecules sodium and water. Organelles are small in structure. They perform a number of functions.
Endoplasmic is in all cells except prukaryoles. It connects to the nuclear envelope and cell membrane. In addition, it carries materials through the cell. This also really helps to make proteins. A number of the functions of the endoplasmic are mechanical support, the transport and function of the synthesis, this is especially the carry of protein.
The ribosomes is contained in all cells. The ribosomes synthesizes protein which will be used inside the cell. Ribosomes are found in the reticulum and are available around in the cytoplasm. Ribosomes are accountable for making and assembling acids and proteins. Ribosomes will be within the cytoplasm of the cell. The proteins they make will function in the cytosol, they are simply then moved beyond your cell and included in the skin cells membranes.
3. 1) Membrane structure is found in all skin cells. In vegetation it is inside the cell wall structure, in animals it is in the exterior layer wall. A lot of the cell membrane framework is made up of protein and phospholipids. The cell membrane composition is not sturdy. The cell membrane structure provides support and a barrier between the cell and activity. The membrane framework supports everything in but also helps to keep any dangerous things out.
3. 2) Diffusion is the growing of different particles of gas, product or a remedy. The act is the movement of particles, the bigger the heat range the faster the debris will move, then the faster the diffusion will take place. Osmosis happens when two alternatives are separated this is the movement of drinking water from one part of high to a location of low normal water across a membrane (semi-permeable). Permeable membranes will let water through but other solution such as sugar cannot stream through widely. The energetic energy uses energy to move different substances in and out of cells. Active travel is important in the kidneys for keeping a your hands on different chemicals needed by your body. These substances are glucose and ions.
4. 1) You will find four types of cells in the human body, epithelial, connective, stressed, and muscle.
4. 2) Epithelial tissue protects the body from moisture reduction, bacteria and inside injury. A couple of two types of epithelial cells in the human body, one covers all the inner and the other external body surfaces as well as the outer part of your skin, the lymph vessels and digestive system. Glandular epithelial also produces human hormones and other products such as, perspiration, saliva, gastric acid and dairy. Connective tissue holds structures together, the loose connective cells holds the outside layer of skin area and the under coating of muscle mass. This tissue is also within lymph nodes, extra fat layers and red bone marrow. The nervous tissue forms the anxious system. This is accountable for all the actions of your body though its network of nerves. It could bring on the struggle or flight reaction to the body. This response is a survival technique enabling people to behave quickly to pain and other life intimidating situations. The stressed system is the brain, spinal cord and sensory organs, these nerves comprise with these two parts of the body. Neurons will be the structural product of the anxious system. They communicate within the body by transporting indicators. There are three types of neurons, afferent neurons are sensory neurons. They transfer sensory indicators to the sensory nervous system from other receptors in the body. Efferent neurons are known as electric motor neurons and transmit signals from the muscles and glands. Inter neurons form within the central anxious system to relay information received from the afferent neurons and point the function of your body through impact information, in other words they interact. Muscle tissue varieties within the skeleton and is also attached to bone fragments and causes motion within the human body. Cardiac muscle is shaped and found in the heart. Smooth muscle is situated in the wall space of the blood vessels, additionally it is located and found in the intestinal and urogenital tracts.
5. 1) Cells that join together are not equivalent but interact to perform different functions for our body. All living things are made of skin cells. One cell makes a kind of tissue. Nerve cells will form nerve cells, sweat glands form perspiration gland tissue. Skin area tissue is constructed of hair tissue oil and sweat cells, they all have skin cells that form out of this and are working together to form the skin. Our body is made of cells, which in turn form tissue, which in turn form organs all working mutually because without this the body wouldn't normally work.
Word matter: 1210
- Claire Richardson
Bibliography:
la. a. 2. 2. 1. 4. 1. (2001-2003). The making associated with an body organ. Available: www. beaconlearningcentre. com/1966. Last reached 29 July 2014.
BBC professors. (aqa science). Tissue organs in animals. Available: gcse bite size. Previous seen 29 July 2014.
1. 1)
Comparing light and electron microscopes. |
description |
usage |
Light microscope |
Uses radiation, by means of light and electron beams. This varieties a larger and more descriptive image to the eye. Could be used for taking a look at specimens. Immediate image. Lower resolution. Can measure living procedures taking place, eg cell department. Magnification: x1000 to x 2000 image and quality. . |
Light microscopes are smaller and lighter and simpler to move. Less expensive, wavelength 400-700nm. Wavelength 1nm. The light is via goblet lenses. Images can be viewed directly. Eyepiece to use is projector lenses. Source used is light. |
Electron microscope |
Uses radiation, in the form of light or electron beams. Uses beams of electrons rather than rays of visible light. Varieties highly magnified images of areas materials and biological specimens. Immediate image. Higher quality in calculating smaller images. Extremely hard to view and living materials due to vacuum pressure inside the electron microscope. Magnification: x 100, 000 sem to tem x 250, 000. |
Two types of electron microscope: transmitting electron microscope, and scanning electron microscope. Form greater images used that the human eye wouldn't normally see. Techniques used staining, mounting, and slicing. Cost is expensive to perform. Use electromagnet(magnetic projector). Effective wavelength 1 nm. |
2. 1)
Organelle |
Function of the organelle |
chromatin |
Is a mixture of DNA and other proteins that make up the chrmosomes. Found in nuclear envelope of the eukaryotic cells. The chromosomes are created when there may be cell section. Chromatin is in the nucleus of the cell. |
ribosome |
Located in the cytoplasm. Make protein that can be used in the cell. Others are located in the enoplasmic reticulum. |
Endoplasmic recticulum (bad) |
Endoplasmic reticulum is a membrane that is found in animal skin cells and plant cells but not in prokaryotic cells. Responsible for moving proteins and carbohydrates to other organelles. The surface of abrasive endoplasmic reticulum has been the protein making ribosome, which gives the appearance of your rough surface. It really is called rough because it is studded with ribosomes. . |
Endoplasmic recticulum (steady) |
The even is a production of metaolism of fatty acids, and steroid hormones. Additionally it is connected with some slippery fats |
Lymosome |
Contains digestive enzymes, breakdown material that enters the cell. Breakdown components, bacteria and other materials. Enzymes are strong and can destrong cell function if released. Stay in the cell within lysosomes membrane to avoid this. |
Golgi apparatus |
This sorts out product packaging of protein for secretion, and also mixed up in move of lipids around the cell. Also the creation of lysosomes. |
Flagella |
The flagella is the censory of the organelle. Inspections chemical amounts and temperature beyond your cell. Found in prokaryptic and eukaryotic cells. |
Mitrochondria |
Organelles that breakdown nutrition and creates energy for the cell. Creating cell energy, cellular respiration, similar to the digestive tract. Mitochondria are small in size organelles. |
Nucleus |
The nucleus creates and regulates cell activity, handles enzymes that are in the cell. Nucleus is found in the eukaryotic skin cells, contains skin cells genetics, DNA molecules, in proteins to create chromosomes. |
4. 2)
Red blood skin cells are found in bone marrow. All bloodstream cells result from bone marrow and form stem cells. Stem cells are located to be imortal, this means they'll never die. Not before human body does indeed. Erythrocytes are also called red blood cells. There function is to help move and move oxygen in the blood. They are around in condition but are similar to disks. Erythrocytes are adaptable and also have a membrane, this then allows them to move through capillaries. Erythrocytes contain hemoglobin to transport oxygen, they then loose nucleus and organelles, then develop in bone marrow. Ciliated epithelial are hairs that sit on top of muscle. They move back and forth and help move things such as mucleus. They are found in the lining of the respitory, where in fact the lungs is. Also, they are found in the fallopian pipes in women. This cells includes mucous to help your body function against and move bacteria such as a cold from the body. Cililated epithelium has cells called goblet skin cells without this parasites would stay in your body and make you be very ill. A sperm cell looks like a tadpole. The tadpole has a mind, tail and neck. The head provides information in the nucleus and the tail makes peopulsion. The top is chiseled and steps five micrometers long and three micrometres wide. The throat has two features nuceus and the actrosome. The top is made up of a mebrane that serves in penetrating the feminine egg. The sperm penetrates the female egg, and produces materials that is hereditary and gets to the ovum. The throat steps one micrometer in length possesses spermatozoon and also two of centrioles that are needed in cell section.
3. 1)
Composition is the elements in what's made up in the cell as a whole. The cell membrane or lipid bi-layer is the external layer of the cell, all skin cells have a membrane which separates a cell from the environment around them. The cell membrane works as a officer to examine what it allows in the cell and what leaves the cell. The cell inner structure comprises of protein and lipids, depending where in the body the location of the cell is. Lipids help the cell in its versatility and shape, proteins assist in the cells transfer of molecules across the membrane. Receptor proteins in the cell help communicate with other things outside of the cell, this happens through neurotransmitters and hormones.
3. 2)
Diffusion is water molecules moving in one portion of high water to areas of very low water. Osmosis is the movements of molecules through the membrane of high water to a minimal water of concentration. Active carry is the motion of molecules across the membrane into the high attentiveness, this is done by and aided by enzymes and requires energy to do this
Diffusion |
Osmosis |
Active transport |
Passive transport |
|
Water substances moving from one portion of high normal water to low drinking water concentration. |
Moves molecules through a membrane of high normal water to a minimal water focus. |
Moves molecules across the membrane into high concentration using enzymes and energy. |
The activity of chemicals across a cell membrane. Irons to an increased concentration to a lower concentration. |
|
Does not require energy to go molecules in one point to another point. |
Does not require energy to move molecules in one point to another point. |
Requires energy to go molecules from one point to another point. |
Does not require energy to move molecules from one point to another point. |
4. 1)
The nervous structure have two main cells neuroglia and neurons. The neuroglia have functions that support the nerve skin cells nevertheless they do not transfer pulses. Neurons are nerve skin cells and are extremely sensitive to warm up and chilly, dark and light. They transmit electric nerves and information around your body. Muscle mass have three types of tissues, cardiac skeletal and soft muscles. Muscle helps with good posture, and support. Clean muscle tissue manages movement in our body and contracts with other muscle in the intestines and abdominal. Skeletal tissue assist in the motion of bones such as hips and wrists, this is enclosed in connective cells(epimysium). The epithelial muscle covers the entire body. It is made of cells with one or more layers. It protects all exterior and internal layers.
Types of tissue |
Structure and function of tissue |
Nerve tissue |
Have two skin cells neurolia and neurons. Have functions that support nerve cells but do not transfer pulses. Neurons delicate to heating, and cool. Dark and light. transmit indicators and information around your body. |
Muscle tissue |
Three types of structure cardiac, skeletal and clean. Helps with good posture and support, manages movement, agreements with other tissue. |
Connective tissue |
Provides motion in bones that exists in connective tissues. |
Epithelial tissue |
Covers all the body, made up of cells that contain a number of layers. Addresses all interior and external layers. |
5. 1) The human body consists of the top and skull which also contains the brain. The pharynx is in the throat, the larynx is at the trunk of the mouth, the lympth nodes are in the neck of the guitar, the heart is in the center of the chest wall structure. The lungs are behind the ribs, there exists arteries in the forearms and there is muscle near the skeleton. The spleen is above the abdomen, each organ is linked to another organ and they all work together for the body to work. The mind sends indicators to different parts of the body to allow them to work. Without these alerts you cannot function. If the brain is dead the rest of the body does not work.
The human palm provide the body with support to go objects in lots of ways. Each palm has 27 different bones and ligaments. The side join on to the wrist and provide flexible movement and wrist action. The hand is also coverd with epidermis. The nerves are expanded into the hand. There are eight carpal bones in the wrist that are bound. The hand can be used for movement and picture up abjects. The palm provides the body with a lot of support.
- Claire Richardson
Word count up: 2765
Bibliography:
nner body. (1999-2013). Hand and wrist. Available: webpage 1. Last reached 30 july 2014.
nner body. (1999-2013). Palm and wrist. Available: web page 1. Last seen 30 july 2014. microscope quality. (2001-2003). human biology. Available: chemical substance microscopes. Last utilized 29 july 2014.