The body's levels or organization 1.4 Flashcards
organization…
all organisms exhibit a complex structure and order
metabolism
metabole=change
all organisms engage in metabolism which is…
defined as the sum of all of the chemical reactions that occur with in the body
metabolism consists of
anabolism and catabolism
anabolism
anabole=a raising up
anabolism is..
small molecules joining to form bigger molecules
catabolism
katabole=a casting down
catabolism is…
large molecules are broken down into smaller molecules
an example of a metabolic reaction
the use of cellular energy (called ATP)for muscle contraction
growth and development…
during their lifetime, organisms assimilate materials from their environment and often exhibit increase size (growth) and increased specialization as related to form and function (development). As the human body grows and develops, structures such as the brain become more complex and elaborately integrated.
responsiveness…
all organisms exhibit it, which is the ability to detect and react to stimuli (changes in the external or internal environment).a stimulus to the skin of the hands, such as an extremely hot temperature, causes the human to withdraw the hand from the stimulus so as to prevent injury or damage. responsiveness occurs at almost all levels of organization
regulation…
an organism must be able to adjust internal bodily function in response to environmental changes. when the body temperature rises more blood is circulated near the body’s surface to facilitate heat loss, and thus return body temperature to within the normal range.
homeostasis…
the process of maintaining body structures and function
reproduction…
all organisms produce new cells for growth, maintenance, and repair. The somatic (body) cells divide by a process called mitosis whereas sex cells (gametes) are produced by another type of cell division called meiosis. The sex cells, under the right conditions, have the ability to develop into a new living organism
