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30 Cards in this Set
- Front
- Back
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Metabolism
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The sum of all chemical reactions in the body.
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Homeostasis
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The tendency of a living body to maintain relatively stable internal conditons in spite of greater changes in external environment.
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Negative Feedback
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a self-corrective mechanism that underlies most homeostasis, change is is detected, responses activate to reverse change.
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Positive Feedback
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Change is detected and body responds to enhance original change.
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Sagittal Plane
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Vertical plane that divides body into left and right portions.
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Coronal plane
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Vertical plane that divides body into front and back portions.
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Transverse plane
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horizontal plane that divides the body into top and bottom.
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Cranial cavity
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formed by skull, contains the brain
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Bertebral canal
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Formed by vertebrae, contains spinal cord
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Thoracic cavity
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Lined by pleural, contins the lungs
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Abdominopelvic cavity
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lined by peritoneum contains abdominal organs and pelvic organs.
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(1) Living things must...
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use energy to maintain the complex level of organization (energy from food)
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(2) Living things must..
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exchange materials with the environment..
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Metabolism
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taking in food,
catabolism- takes apart anabolism- puts together |
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(3) Living things must...
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exhibit movement
*body can move from one place to another. *materials can be moved from place to place within body. |
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(4) Living things must...
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Reproduce
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Asexual Reproduction
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Involves a single parent that splits identical daughter offspring...
(mitosis in human body) |
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Sexual Reproduction
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Involves the union of sperm and egg from separate parents to produce offspring with unique traits.
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(5) Living things must...
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grow and develop
*increase in mass, size, and level of complexity. |
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(6) Living things must...
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Pass hereditary traits to their offspring.
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Genes
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Pieces of DNA ona chromosone that control the development and appearance of particular traits.
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(7) Living things must...
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Adapt to their environment.
*Genes control traits and behaviors that improve survival. |
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(8) Living things must...
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Change overtime.
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Evolution
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traits and/or behaviors are selected for or against, depending upon impact that they have on survival.
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Atoms
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smallest units
Chemical Level |
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molecules
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consist of two or more atoms chemically bonded
Chemical Level |
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Cell
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structural and functional units of life.
Cellular Level |
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organelles
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with in a cell carry out specific tasks.
Cellular Level |
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Tissue
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mass of similar cells working together to perform a task.
(epithelial, connective, muscle, and nerve are different types) Tissue Level |
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Organ
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Two or more tissue types that perform a particular function and assume a recognizable shape.
Organ Level |
