Introduction to study of Anatomy and Physiology - COMPLETE Flashcards
Define Homeostasis
A dynamic equilibrium around a fixed point
Define Negative Feedback Mechanisms
Allows for Homeostasis around a set point.
Negative Feedback Examples
Blood Glucose levels: Raises and lowers depending on the body’s blood glucose levels.
Define Positive Feedback Mechanisms
A self-amplifying mechanism that goes to completion once it starts
Positive Feedback Mechanisms examples
Uterine Contractions: During childbirth the muscles will contract or tighten until the baby is born
Structural Hierarchy (Smallest to Largest)
Atom, Molecule, Organelle, Cell, Tissue, Organs, Organ Systems
Define Atom
Extremely small particles that are the basic building blocks of all matter.
Define Molecule
Smallest particle of a substance that has all the physical and chemical properties of a substance
Define Organelle
A sub-cellular structure that has one or more specific jobs to perform in the cell
Define Cells
A mass of cytoplasm that is bound externally by a cell membrane
Define Tissues
A group of cells that have a similar structure and that function together as a similar unit
Define Organ
A collection of tissues that collectively forma functional unit specialized to perform a specific function.
Define Organ Systems
Collection of anatomical structures that work together to achieve a function
Define Ventral/Anterior
The front of the body
Define Dorsal/Posterior
The back of the Body
