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30 Cards in this Set

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Metabolism
The sum of all chemical reactions in the body.
Homeostasis
The tendency of a living body to maintain relatively stable internal conditons in spite of greater changes in external environment.
Negative Feedback
a self-corrective mechanism that underlies most homeostasis, change is is detected, responses activate to reverse change.
Positive Feedback
Change is detected and body responds to enhance original change.
Sagittal Plane
Vertical plane that divides body into left and right portions.
Coronal plane
Vertical plane that divides body into front and back portions.
Transverse plane
horizontal plane that divides the body into top and bottom.
Cranial cavity
formed by skull, contains the brain
Bertebral canal
Formed by vertebrae, contains spinal cord
Thoracic cavity
Lined by pleural, contins the lungs
Abdominopelvic cavity
lined by peritoneum contains abdominal organs and pelvic organs.
(1) Living things must...
use energy to maintain the complex level of organization (energy from food)
(2) Living things must..
exchange materials with the environment..
Metabolism
taking in food,
catabolism- takes apart
anabolism- puts together
(3) Living things must...
exhibit movement

*body can move from one place to another.
*materials can be moved from place to place within body.
(4) Living things must...
Reproduce
Asexual Reproduction
Involves a single parent that splits identical daughter offspring...
(mitosis in human body)
Sexual Reproduction
Involves the union of sperm and egg from separate parents to produce offspring with unique traits.
(5) Living things must...
grow and develop
*increase in mass, size, and level of complexity.
(6) Living things must...
Pass hereditary traits to their offspring.
Genes
Pieces of DNA ona chromosone that control the development and appearance of particular traits.
(7) Living things must...
Adapt to their environment.
*Genes control traits and behaviors that improve survival.
(8) Living things must...
Change overtime.
Evolution
traits and/or behaviors are selected for or against, depending upon impact that they have on survival.
Atoms
smallest units

Chemical Level
molecules
consist of two or more atoms chemically bonded

Chemical Level
Cell
structural and functional units of life.

Cellular Level
organelles
with in a cell carry out specific tasks.

Cellular Level
Tissue
mass of similar cells working together to perform a task.

(epithelial, connective, muscle, and nerve are different types)

Tissue Level
Organ
Two or more tissue types that perform a particular function and assume a recognizable shape.

Organ Level