Week 2 Worksheet – Chapters 3, 4, and 5
1 The movement of a substance from one place to another due to the substance's kinetic energy. Diffusion 3 The smallest living structural and functional unit that is enclosed by a membrane. Cell 6 The point at which a substance becomes evenly distributed throughout the solution and the concentration gradient disappears. equilibrium 7 One cell or a group of highly specialized epithelial cells that secrete substances into ducts, onto a surface, or into the blood. Glands 8 The site of most ATP production; also called the "power-houses" of a cell. Mitochondria 14 Type of tissue that covers body surfaces; lines body cavities, hollow organs, and ducts; and forms glands. Epithelial Tissue 16 Type of connective tissue that can be classified as either compact or spongy, depending on how the matrix and cells are organized. Bone (osseous tissue) 17 One of the five major functions of the skin; the others include body temperature regulation, cutaneous sensations, excretion and absorption, and synthesis of vitamin D. 18 Type of tissue that protects and supports the body and its organs, binds organs together, stores energy reserves as fat, and provides immunity. Connective tissue 19 A tough, fibrous protein found in the epidermis that helps protect the skin and underlying tissues from heat, microbes, and chemicals. Keratin 20 Type of tissue that generates the force needed to make body structures move. Can be classified as either skeletal, cardiac, or smooth. muscular 21 Property of a membrane that allows some substances to move into and out of the cell but restricts the passage of other substances (two words). 22 The difference in concentration between two different areas (two words). concentration gradient 24 The superficial, thinner portion of the skin, which is composed of epithelial tissue. epidermis DOWN
2 Immature, undifferentiated cells that divide to replace lost or damaged cells...
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