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SCI220-Set1: W1-5
| Question | Answer |
|---|---|
| what is homeostasis? | The bodys ability to maintain a stable internal environment despite external changes. |
| what are the six level of structural organization in the body? | Chemical, cellular, tissue, organ, system, and organism levels. |
| what is the primary function of the integumentary system? | protection, temperature regulation, and sensory reception. |
| which system is responsible for transporting nutrients and oxygen throughout the body? | the circulatory system. |
| what does the respiratory system primarily do? | Exchanges gases, oxygen and carbon dioxide, between the body and environment. |
| What is the primary function of the skeletal system? | To support the body, protect organs, and provide attachment for muscles. |
| What is the primary function of the muscular system? | A: To produce movement and generate heat through contraction. |
| What does the nervous system control? | It controls communication, coordination, and response to stimuli throughout the body. |
| What are the two main body cavities? | Dorsal (cranial and spinal) and ventral (thoracic and abdominopelvic). |
| What is negative feedback in homeostasis? | A control mechanism that reverses a change to maintain internal balance. |
| What is positive feedback in homeostasis? | A mechanism that amplifies a process, such as during labor contractions or blood clotting |
| What is metabolism? | The sum of all chemical reactions in the body, including building up (anabolism) and breaking down (catabolism). |
| What are cells often referred to as? | The structural and functional units of life. |
| What is diffusion? | The movement of molecules from an area of higher concentration to an area of lower concentration. |
| Plasma Membrane | The outer boundary of a cell that regulates the passage of materials in and out. |
| Cytoplasm | The gel-like substance inside the cell that contains organelles and supports metabolic reactions. |
| Nucleus | The control center of the cell that stores genetic material (DNA). |
| Mitochondria | Organelles that produce ATP through cellular respiration; the “powerhouses” of the cell. |
| Ribosomes | Small organelles that synthesize proteins; may be free in the cytoplasm or attached to the endoplasmic reticulum. |
| Endoplasmic Reticulum (ER) | A network of membranes involved in protein and lipid synthesis; can be smooth or rough. |
| Golgi Apparatus | Modifies, packages, and ships proteins and lipids for transport within or outside the cell. |
| Lysosomes | Organelles containing digestive enzymes that break down waste materials and cellular debris. |
| Epithelial Tissue | Covers body surfaces, lines cavities, and functions in protection, absorption, and secretion. |
| Connective Tissue | The most abundant tissue in the body; supports, binds, and protects organs. |
| Muscle Tissue | Specialized tissue that contracts to produce movement and maintain posture. |
| Nervous Tissue | Tissue that transmits electrical impulses for rapid communication and control. |
| Organ System | A group of organs working together to perform complex body functions. |
| The __________ plane divides the body into left and right sections. | Sagittal. |
| The process by which cells maintain internal balance is called __________. | Homeostasis. |
| The human body is organized into __________ major organ systems that work together to maintain homeostasis. | Eleven. |
Created by:
jdbalunsatz