protozoans
what is Plankton
microorganisms that draft and float in water
Homeostatic control variables involve these three components:
receptor, control center, effector
The study of the structure of body parts and their relationship to one another
Anatomy
The study of the functions of body parts; how they work to carry out life sustaining activities
Physiology
Mechanism that changes in opposite direction of initial change
Negative feedback mechanism
what are two morphological forms of protozoa that enter host via ingestion
Trophozoite: feeding and reproducing stage that lives within the host.
Cyst: infective form that survives in the environment; contains protective wall
These monitor environment and responds to stimuli (that which causes changes in controlled variables)
Receptor
This is the smallest living units of living things
Cells
organs that work together to accomplish a common purpose make up this
organ system
A group of similar cells comprises this
tissue
what is encystment
in harsh environmental conditions, trophozoites undergo forming cyst
Determines the set point at which variable is maintained. It receives input from receptor and determines appropriate response
Control Center
a group of organ systems make up
mechanism that exaggerates the original stimulus
positive feedback mechanism
Every living organism needs to do this so that its internal environment to remain distinct from the external environment
maintain boundaries
classic 3 groups by their mode of locomotion
1. paramecium (with cillia)
2. Amoeba (with pseudopods)
3.Euglena (flagellum)
Receives output from control center. Provides means to respond to either reduce the stimulus or enhance the stimulus
Effector
this organ system is a fast-acting control system of the body that responds to internal and external changes by activating appropriate muscles and glands
nervous system
this organ system picks up fluid leaked from blood vessels and returns it to blood
lymphatic system
the process of removing wastes from the body
excretion
Two types of reproduction in protozoan and how do they occur
Asexual: binary fission, budding or schizogony (merozoites stored into schizonts)
Sexual: produce haploid gametes that fuse together (syngamy), can undergo conjugation
a broad term that includes all chemical reactions that occur within body cells. It includes breaking down substances into simpler building blocks
metabolism
this organ system protects and supports body organs and provides a framework the muscles use to cause movement
skeletal system
this is the ability to sense changes in the environment and then respond to them
responsiveness (excitability)
this organ system eliminates nitrogenous wastes from the body.
urinary system