The diagram shows several human organs. What is the purpose of these organ systems?

to help digest food and release nutrients

to release chemicals that reduce pain

How do the Circulatory and Respiratory Systems Work Together?

QUIZ IN SCIENCE 9/How Do the Respiratory and the Circulatory Systems Work Together?

Biomedical Engineering Flashcard 1 Q: What is biomedical engineering? A: The field that designs medical solutions (devices, implants, machines, medicines) to improve health. Flashcard 2 Q: How many bones does an adult have? A: 206 bones. Flashcard 3 Q: How many bones are humans born with? A: About 270 bones. Flashcard 4 Q: What is a prosthetic? A: An artificial device used to replace a missing body part. Flashcard 5 Q: What must engineers consider when designing prosthetics? A: Connection to the body Communication with the body Life-like movement Flashcard 6 Q: What is internal fixation? A: Hardware attached inside the body directly to the bone to repair it. Flashcard 7 Q: Examples of internal fixation? A: Rods, screws, plates, pins, bone grafts. Flashcard 8 Q: What is external fixation? A: Supports outside the body used to stabilize bones while they heal. Flashcard 9 Q: Examples of external fixation? A: Casts, braces, slings, external screws. Flashcard 10 Q: What is biocompatibility? A: Materials that can safely exist in the body without causing harm or rejection. Circulatory System Flashcard 11 Q: What is the job of the circulatory system? A: Deliver oxygen and nutrients and remove wastes from cells. Flashcard 12 Q: What do arteries do? A: Carry blood away from the heart. Flashcard 13 Q: What do veins do? A: Carry blood back to the heart. Flashcard 14 Q: What do capillaries do? A: Exchange oxygen, nutrients, and waste with tissues. Flashcard 15 Q: What are the 4 main components of blood? A: Plasma Red blood cells White blood cells Platelets Flashcard 16 Q: Name 3 circulatory diseases. A: Arteriosclerosis Hypertension (high blood pressure) Coronary heart disease Flashcard 17 Q: What lifestyle choices increase circulatory disease risk? A: Tobacco use Alcohol use Poor nutrition Physical inactivity Obesity Stem Cells Flashcard 18 Q: What are stem cells? A: Cells that can develop into many different specialized cell types. Flashcard 19 Q: Why is embryonic stem cell research controversial? A: Because it involves destroying embryos, which some believe is destroying human life. pH and Indicators Flashcard 20 Q: What pH number is an acid? A: Below 7. Flashcard 21 Q: What pH number is neutral? A: 7. Flashcard 22 Q: What pH number is a base? A: Above 7. Flashcard 23 Q: Examples of pH indicators? A: Litmus paper Red cabbage indicator Anthocyanins Hydrogels Flashcard 24 Q: What is a hydrogel? A: A material made of polymer chains that can hold large amounts of water. Flashcard 25 Q: Examples of hydrogels? A: Gelatin Collagen Alginate Fireworks Flashcard 26 Q: What are the 4 main parts of fireworks? A: Oxidizer, fuel, binder, metal salt. Flashcard 27 Q: What color does Barium produce? A: Light green. Flashcard 28 Q: What color does Copper produce? A: Blue-green. Flashcard 29 Q: What color does Strontium produce? A: Dark red. Flashcard 30 Q: What color does Potassium produce? A: Light purple. Flashcard 31 Q: What color does Lithium produce? A: Orange-red. Flashcard 32 Q: What effect does Iron produce in fireworks? A: Sparks.

1 What is the Australian Qualifications Framework (AQF)? 2 Describe three nationally accredited training products. 3 Define CBA. How is CBA different from other types of assessment? Briefly describe how the four (4) principles of assessment impact the CBA process. 4 Briefly describe how the rules of evidence impact the collection of evidence. 5 Describe different methods of gathering evidence for CBA . Describe the three main assessment methods. Describe the two different assessment pathways. What is recognition of prior learning (RPL), and what are the benefits? 6 What are the three endorsed components of training packages? 7 Briefly describe the components of a unit of competency (UofC). 8 What is the ACSF? Identify the five core skills. 9 How do the dimensions of competency guide assessment practices? 10 What is the purpose and context of assessment? How can you contextualise an assessment while maintaining the integrity of the Unit of Competency? 11 What is the difference between assessment tools and assessment instruments? What are the essential parts of an assessment tool? 13 What is the purpose of mapping against units of competency? 14 Describe reasonable adjustment in competency-based assessment. What are the limitations? 15 What would you do if a candidate provided you with evidence that was not authentic? 16 How does the marker’s guide support you in objective assessment judgement? 17 Give an example of inclusive language when giving assessment instructions. 18 What are the key WHS instructions that are required prior to commencing assessment? 19 What do you look for when clustering units of competency for an assessment tool? 20 What are the key characteristics of a cohort of learners that need to be considered in the planning an assessment tool?

Cells of different organisms and even cells within the same organism are very diverse in terms of shape, size, and internal organization. One theme that occurs again and again throughout biology is that form follows function. In other words, a cell’s function influences its physical features. Cell Shape The diversity in cell shapes reflects the different functions of cells. Compare the cell shapes shown in Figure 4-4. The long extensions that reach out in various directions from the nerve cell shown in Figure 4-4a allow the cell to send and receive nerve impulses. The flat, platelike shape of skin cells in Figure 4-4b suits their function of covering and protecting the surface of the body. As shown below, a cell’s shape can be simple or complex depending on the function of the cell. Each cell has a shape that has evolved to allow the cell to perform its function effectively. SECTION 2 OBJECTIVES ● Explain the relationship between cell shape and cell function. ● Identify the factor that limits cell size. ● Describe the three basic parts of a cell. ● Compare prokaryotic cells and eukaryotic cells. ● Analyze the relationship among cells, tissues, organs, organ systems, and organisms. VOCABULARY plasma membrane cytoplasm cytosol nucleus prokaryote eukaryote organelle tissue organ organ system Cells have various shapes. (a) Nerve cells have long extensions. (b) Skin cells are flat and platelike. (c) Egg cells are spherical. (d) Some bacteria are rod shaped. (e) Some plant cells are rectangular. FIGURE 4-4 (a) Nerve cell (b) Skin cells (c) Egg cell (d) Bacterial cells (e) Plant cells Copyright © by Holt, Rinehart and Winston. All rights reserved. 1. All cubes have volume and surface area. The total surface area is equal to the sum of the areas of each of the six sides (area = length X width). 2. If you split the first cube into eight smaller cubes, you get 48 sides. The volume remains constant, but the total surface area doubles. 3. If you split each of the eight cubes into eight smaller cubes, you have 64 cubes that together contain the same volume as the first cube. The total surface area, however, has doubled again. CELL STRUCTURE AND FUNCTION 73 Cell Size Cells differ not only in their shape but also in their size. A few types of cells are large enough to be seen by the unaided human eye. For example, the nerve cells that extend from a giraffe’s spinal cord to its foot can be 2 m (about 6 1/2 ft) long. A human egg cell is about the size of the period at the end of this sentence. Most cells, how- ever, are only 10 to 50 μm in diameter, or about 1/500 the size of the period at the end of this sentence. The size of a cell is limited by the relationship of the cell’s outer surface area to its volume, or its surface area–to-volume ratio. As a cell grows, its volume increases much faster than its surface area does, as shown in Figure 4-5. This trend is important because the materials needed by a cell (such as nutrients and oxygen) and the wastes produced by a cell (such as carbon dioxide) must pass into and out of the cell through its surface. If a cell were to become very large, the volume would increase much more than the surface area. Therefore, the surface area would not allow materials to enter or leave the cell quickly enough to meet the cell’s needs. As a result, most cells are microscopic in size. Comparing Surface Cells Materials microscope, prepared slides of plant (dicot) stem and ani- mal (human) skin, pencil, paper Procedure Examine slides by using medium magnification (100). Observe and draw the sur- face cells of the plant stem and the animal skin. Analysis How do the surface cells of each organism differ from the cells beneath the surface cells? What is the function of the surface cells? Explain how surface cells are suited to their function based on their shape. Quick Lab Small cells can exchange substances more readily than large cells because small objects have a higher surface area–to-volume ratio. FIGURE 4-5 mb06se_csfs02.qxd 5/18/07 10:54 AM Page 73 74 CHAPTER 4 BASIC PARTS OF A CELL Despite the diversity among cells, three basic features are common to all cell types. All cells have an outer boundary, an interior sub- stance, and a control region. Plasma Membrane The cell’s outer boundary, called the plasma membrane (or the cell membrane), covers a cell’s surface and acts as a barrier between the inside and the outside of a cell. All materials enter or exit through the plasma membrane. The surface of a plasma mem- brane is shown in Figure 4-6a. Cytoplasm The region of the cell that is within the plasma membrane and that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus is called the cytoplasm. The part of the cytoplasm that includes molecules and small particles, such as ribosomes, but not membrane-bound organelles is the cytosol. About 20 percent of the cytosol is made up of protein. Control Center Cells carry coded information in the form of DNA for regulating their functions and reproducing themselves. The DNA in some types of cells floats freely inside the cell. Other cells have a mem- brane-bound organelle that contains a cell’s DNA. This membrane- bound structure is called the nucleus. Most of the functions of a eukaryotic cell are controlled by the cell’s nucleus. The nucleus is often the most prominent structure within a eukaryotic cell. It maintains its shape with the help of a protein skeleton called the nuclear matrix. The nucleus of a typical animal cell is shown in

Can you imagine what life would be if we run out of water? Very good! We can be very dirty as well as our environment! Do you know that water plays an important role n our lives? Yes, it is said that man can live for three days without food but not without water. OBJECTIVES: - States the importance of water in our lives - Practices ways to conserve water SCIENCE 2 – MODULE 8 SEIBO COLLEGE 16 Water is our life. It makes up the 50-90 percent of our body. Our cells will not be healthy if there’s no water. What do you feel when you are thirsty? Can you concentrate on the things that you are doing when you are thirsty? How about when you did not take a bath, how do you feel? Can you sleep at night comfortably without taking a bath? These are some things that remind us how important water is to us. So we need to learn to conserve it for us to enjoy it longer and for us to have enough supply of water for a long period of time. How can we participate in water conservation? Here’s how… Ways of Conserving Water 1. Turn off the faucet when not in use. Make sure it is tightly close. 2. When brushing teeth, use a glass to avoid wasting water. 3. When washing dishes, use enough water by using a basin. 4. When you observed that you water pipe is leaking, call a plumber immediately to fix it and avoid water from leaking. SCIENCE 2 – MODULE 8 SEIBO COLLEGE 17 5. Avoid frequent use of shower when taking a bath, use pail and dipper instead. 6. Never play with water. 7. Do not throw garbage or trash on the different sources of water. 8. Use watering can in watering plants to avoid excessive use of water. 9. Recycle used water. We can use water from the washing machine to clean our windows, comfort room and even our car. What are the things that you do at home that can help conserve water? Very good! You may now do the activities.

Types of questions: Here are common categories of comprehension questions: Literal/Factual Questions: These ask for information explicitly stated in the text. Example: Who was the first person to discover the new island? Vocabulary Questions: These test understanding of a word or phrase's meaning as used in the passage. Example: In the sentence, "The ancient scroll was fragile," what does "fragile" mean? Inferential Questions: These require you to "read between the lines" and draw conclusions not directly stated in the text. Example: Why do you think the character felt so nervous before the interview? Main Idea Questions: These ask you to identify the central message or key point of the passage. Example: What is the primary purpose of this article? Author's Purpose/Tone Questions: These questions assess your understanding of why the author wrote the text and the attitude they convey. Example: What emotion is the author trying to evoke in the reader? Figurative Language Questions: These test your knowledge of literary devices like metaphors, similes, and personification. Example: What does the author mean by "the world is a stage"? Synthesis Questions: These ask you to combine information from different parts of the text to form a new idea or understanding. Example: How do the first and last paragraphs relate to each other to create a unified message? Evaluative Questions: These go beyond the text to ask for your opinion or judgment about the content. Example: Do you agree with the author's conclusion? Why or why not?

Nam: Hello, Minh. Minh: Hi, Nam. How are you? I’m going to play football at our school sports field with a few friends this evening. Are you free to join us? Nam: I’d love to, but I’m afraid I can’t. I’m preparing dinner. Minh: Really? Doesn’t your mum cook? Nam: Oh, yes. My mum usually does the cooking, but she’s working late today. Minh: How about your sister, Lan? Does she help with the housework? Nam: Yes. She often helps with the cooking. But she can’t help today. She’s studying for her exams. Minh: I see. I never do the cooking. It’s my mother’s job. Nam: Really? So how do you divide the household chores in your family? Minh: Mum is the homemaker, so she does the chores. My dad is the breadwinner; he earns money. And we, the kids, study. Nam: Well, in my family, we divide the housework equally – Mum usually cooks and shops for groceries; Dad cleans the house and does the heavy lifting. Minh: What about you and your sister? Nam: My sister does the laundry. I do the washing-up and put out the rubbish. We also help with the cooking when our mum is busy. Minh: That sounds fair! Anyway, I have to go now. See you later. Nam: Bye. Have fun.

Cell Size Cells differ not only in their shape but also in their size. A few types of cells are large enough to be seen by the unaided human eye. For example, the nerve cells that extend from a giraffe’s spinal cord to its foot can be 2 m (about 6 1/2 ft) long. A human egg cell is about the size of the period at the end of this sentence. Most cells, how- ever, are only 10 to 50 μm in diameter, or about 1/500 the size of the period at the end of this sentence. The size of a cell is limited by the relationship of the cell’s outer surface area to its volume, or its surface area–to-volume ratio. As a cell grows, its volume increases much faster than its surface area does, as shown in Figure 4-5. This trend is important because the materials needed by a cell (such as nutrients and oxygen) and the wastes produced by a cell (such as carbon dioxide) must pass into and out of the cell through its surface. If a cell were to become very large, the volume would increase much more than the surface area. Therefore, the surface area would not allow materials to enter or leave the cell quickly enough to meet the cell’s needs. As a result, most cells are microscopic in size. Comparing Surface Cells Materials microscope, prepared slides of plant (dicot) stem and ani- mal (human) skin, pencil, paper Procedure Examine slides by using medium magnification (100). Observe and draw the sur- face cells of the plant stem and the animal skin. Analysis How do the surface cells of each organism differ from the cells beneath the surface cells? What is the function of the surface cells? Explain how surface cells are suited to their function based on their shape. Quick Lab Small cells can exchange substances more readily than large cells because small objects have a higher surface area–to-volume ratio. FIGURE 4-5 mb06se_csfs02.qxd 5/18/07 10:54 AM Page 73 74 CHAPTER 4 BASIC PARTS OF A CELL Despite the diversity among cells, three basic features are common to all cell types. All cells have an outer boundary, an interior sub- stance, and a control region. Plasma Membrane The cell’s outer boundary, called the plasma membrane (or the cell membrane), covers a cell’s surface and acts as a barrier between the inside and the outside of a cell. All materials enter or exit through the plasma membrane. The surface of a plasma mem- brane is shown in Figure 4-6a. Cytoplasm The region of the cell that is within the plasma membrane and that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus is called the cytoplasm. The part of the cytoplasm that includes molecules and small particles, such as ribosomes, but not membrane-bound organelles is the cytosol. About 20 percent of the cytosol is made up of protein. Control Center Cells carry coded information in the form of DNA for regulating their functions and reproducing themselves. The DNA in some types of cells floats freely inside the cell. Other cells have a mem- brane-bound organelle that contains a cell’s DNA. This membrane- bound structure is called the nucleus. Most of the functions of a eukaryotic cell are controlled by the cell’s nucleus. The nucleus is often the most prominent structure within a eukaryotic cell. It maintains its shape with the help of a protein skeleton called the nuclear matrix. The nucleus of a typical animal cell is shown in Figure 4-6b. Most animal cells have a cell membrane, a nucleus, and a variety of other organelles embedded in a watery substance. The surface of the cell membrane can be seen in (a). The organelles inside the cell are labeled in the diagram (b). FIGURE 4-6 (a) (b) Mitochondrion Microfilaments Lysosome Golgi apparatus Smooth ER Ribosomes Cell membrane Microtubules Rough ER Nuclear pore Nuclear envelope Nucleolus Nucleus Copyright © by Holt, Rinehart and Winston. All rights reserved. Cell wall Ribosome Cell membrane Peptidoglycan Pili Flagellum DNA CELL STRUCTURE AND FUNCTION 75 A prokaryotic cell lacks a membrane- bound nucleus and membrane-bound organelles. Most prokaryotic cells are much smaller than eukaryotic cells are. FIGURE 4-7 A white blood cell (eukaryotic) changes shape as it attacks purple- stained bacterial cells that are much smaller (prokaryotic). FIGURE 4-8 TWO BASIC TYPES OF CELLS Fossil evidence suggests that the earliest cells on Earth were simple cells similar to some present-day bacteria. As cells evolved, they differentiated into two major types: prokaryotes and eukaryotes. Prokaryotes Prokaryotes (proh-KAR-ee-OHTS) are organisms that lack a membrane- bound nucleus and membrane-bound organelles. Although prokaryotic cells lack a nucleus, their genetic information—in the form of DNA—is often concentrated in a part of the cell called the nucleoid. Figure 4-7 shows a typical prokaryotic cell. Prokaryotes are divided into two domains: Bacteria and Archaea (ahr-KEE-uh). The domain Bacteria includes organisms that are similar to the first cellular life-forms. The domain Archaea includes organisms that are thought to be more closely related to eukaryotic cells found in all other kingdoms of life. Eukaryotes Organisms made up of one or more cells that have a nucleus and membrane-bound organelles are called eukaryotes (yoo-KAR-ee-OHTS). Eukaryotic cells also have a variety of subcellular structures called organelles, well-defined, intracellular bodies that perform specific functions for the cell. Many organelles are surrounded by a mem- brane. The organelles carry out cellular processes just as a person’s pancreas, heart, and other organs carry out a person’s life processes. Eukaryotic cells are generally much larger than prokary- otic cells, as seen in Figure 4-8, which shows a white blood cell (eukaryote) destroying tiny bacterial cells (prokaryotes).

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