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Stack #4542970
| Question | Answer |
|---|---|
| What is homeostasis? | the ability of our body to maintain a stable environment |
| what i negative feedback? | Negative feedback is the reverse change to restore the balance |
| What are the four main classes of biomolecules? | Carbohydrates, Lipids, Proteins, Nucleic Acid, |
| Which one is the structure that controls what enters the cell? | The cell membrane |
| What is the fluid mosaic? | A fluid layer of phospholipids with embedded proteins that move freely creating a flexible barrier, that looks like a mosaic |
| what is active transport? | Transport that uses ATP and moves substances against the gradient |
| what is passive transport? | Is like diffusion or osmosis, it doesn't require energy and it moves substances down the concentration gradient. |
| What are the main tissue type? | Epithelial Connective Muscle Nervous |
| What are the two main layers of the skin? | Epidermis Dermis |
| What are the two main types of bone tissue? | Compact bone Spongy Bone |
| How do myosin and actin interact in muscle contraction ? | The myosin heads attach to the filaments forming cross-bridges, then pivot using ATP energy to pull actin toward the center of the sarcomere, shortening the muscle. |
| How does calcium work for skeletal and muscle physiologically ? | For bones it provides rigidity and as a mineral reserve. In muscles it triggers actin and myosin by binding to troponin for contraction. |
Created by:
sramos19