Week 1 Flashcards
Protein Actin and Myosin are responsible for contrition of
cardiocytes: cardiac muscle cells
Integumentary System
protects against environmental hazards, helps regulate body temperature and provides sensory information. (such as skin, hair, sweat glands and nails).
Skeletal System
Provides support and protection for other tissues, stores calcium and other minerals, forms blood cells. (such as bones, cartilages, associated ligaments, bone marrow)
Muscular System
Provides movement, provides protection and support for other tissues, generates heat that maintains body temperature. (tendons and muscles)
Nervous system
Directs immediate responses to stimuli, coordinates or moderates activities of other organ systems, provides and interprets sensory information about external conditions. (Such as brain, spinal cord, peripheral nerves and sense organs)
Homeostasis
State of equilibrium. All body system working together to maintain a stable internal environment
-Systems respond to external and internal changes to function within a normal range (such as body temp, concentration of ions, metabolic waste products)
Negative Feedback
Self corrective:
change is detected and response activated to reverse the change to achieve normal range.
Homeostasis process
Detection-Receptor-Control Center(proceses signals and sends instruction)-Effector (carries out instructions)
Positive Feedback
Self amplifying (its seeking to accept the change) Body is moved away from homeostasis, normal range is lost
Dynamic equilibrium
continual adaption
Plane
a three dimensional axis
Section
a splice parallel to a plane
Serous Membranes
Lines body cavities and covers organs. Consists of Parietal Layer and Visceral layer.
Parietal Layer
lines cavity
Visceral layer
covers organ
Gene Expression
different genes are turned ‘on’ or ‘off’ at different times in the development of different cell lines. Cells undergo differentiation as they take on their final function.
Tissues
A collection of specialized cells and products that functions cooperatively
4 main type of tissues
Epithelial tissue, connective, muscle, neural.
Epithelial tissue Overview
covers external surfaces, lines internal passageways, forms glands.
Connective tissue Overview
Specialized cells, solid extracellular protein fibers, fluid extracellular ground substance, supports other tissues, fills internal spaces, transports materials.
Matrix
determines specialized function of tissue.
Muscle tissue Overview
specialized for contraction:
skeletal muscle
Cardiac muscle
Smooth muscle
Neural Tissue Overview
carries electrical signals from one part of the body to another, detects stimuli, processes information, coordinates response
Characteristics of Epithelia
cellularity (closely bound cells with cell junctions)
Polarity ( apical and basal surfaces)
Attachment (basement membrane aka basal lamina)
Avascular (rely on diffusion for nutrient/waste exchange
Regenerative
Stem cells
