Test Review Sheet 1 Flashcards
understand what physiology is
the study of how the human body functions with an emphasis on specific cause and effect mechanisms
what are the basics to the scientific method
- confidence that the natural world including ourselves, is ultimately explainable in terms we can understand
- descriptions and explanations of the natural world that are honestly based on observations and that could be modified or refuted by other observations
- humility, or the willingness to accept the fact that we could be wrong, if further study should yield conclusions that refuted all or part of an idea, the idea would have to be modified accordingly
negative feedback loops
a response mechanisms that serves to maintain a state of internal consistency, or homeostasis. Effectors are activated by changes in the internal environment and the inhibitory actions of the effectors serve to counteract these changes and maintains a state of balance
ex: blood sugar regulation, thermoregulation
positive feedback loops
the action of effectors amplifies those changes that stimulated the effectors
ex: blood clotting
sensors
detect a change in the body and send information to the integrating center
effectors
a collective term for muscles and glands that are activated by motor neurons
integrating center
decides whether to cause an increase or decrease in effector action to counter the deviations from the set point and defend homeostasis
what is the order of organization in our bodies
cell, tissue. organ, organ system, organisms
what are the main tissue types and functions
skeletal tissue
cardiac muscle
smooth muscle
which muscles are involuntary
cardiac and smooth muscle
which muscles are voluntary
skeletal muscle
what are neuroglia
provide the neurons with structural support and perform a variety of functions that are needed for the normal physiology of the nervous system
endocrine glands
secrete chemicals called hormones into the blood
exocrine glands
secrete chemicals through a duct that leads to the outside of a membrane, and thus outside of a body surface
what are all the organ systems
integumentary muscular skeletal nervous circulatory lymphatic respiratory endocrine urinary/excretory reproductive digestive
atom
are the smallest units of the chemical elements
proton
positively charged particles
neutron
neutrally charged particles
electron
negatively charged particles
atomic number
number of protons in an atom
mass number
the sum of protons and neutrons in an atom