| Term | Definition |
| the cell membrane | Cholesterol, in spite of its bad reputation, is an essential component of ... |
| smooth endoplasmic reticulum | Synthesis of phospholipids, steroid hormones, and glycogen occurs within ... |
| selectively permeable | Cell membranes control the movement of substances into and out of the cell and are best described as ... |
| glucose | A primary energy source for skeletal muscle is ... |
| facilitated diffusion | Movement of glucose into skeletal muscle cells occurs via ... |
| collagen | Connection of skeletal muscle to bones is made by tendons, which consist primarily of ... fibers |
| cynovial | Joint cavities are found at articulations, are fluid-filled, and are lined by ... membranes. |
| melanin | Protection of the skin from the harmful effects of ultraviolet light is provided by the pigment ... |
| apocrine | Which sweat glands become functional at puberty? |
| osteoblasts | New bone matrix accompanied by increased strength and mass is the result of activity of ... |
| spongy bone | Blood cell formation in adults is a function of red bone marrow primarily located within ... |
| parathyroid hormone | When blood calcium levels fall to below normal levels, osteoclast activity is stimulated and calcium excretion is decreased under the influence of elevated levels of ... |
| abduction | Movement at a joint that takes a body part away from the long axis of the body is ... |