Integrates fx of all body parts to understand fx of entire body
What are the living units of the body?
How is energy released from the macronutrients that is required for normal functioning of cells?
O2 combines with breakdown products of them that releases energy
Where are the cells bathed?
T/F Most cells have the ability to reproduce?
All organs & tissues perform fx that help to maintain the constituents of ECF relatively constant, what is this condition termed?
How is ECF transported in the body?
Mvmt of fluid btwn cap & cells
What happens as blood passes through the capillaries?
Lrg portion diffuses back & forth into ISF btwn cells which allows for exchange of nutrients
What is the respiratory systems main goal in contributing to homeostasis?
O2 delivery to body while removing Co2
What is the GI systems main goal in contributing to homeostasis?
Digests food & absorbs nutrients into the ECF
Why is the liver so important?
Changes the chemical comp of substances to more usable forms & stores them until they are needed
Which system provides protection of internal organs & aids in body support?
What systems are involved with the removal of metabolic end products?
What produces Co2?
How does the respiratory system expel Co2 from the body?
It gets released from the blood into alveoli which then gets expelled into the external environment
What excretes most of the waste products but not Co2?
How do the kidneys play a major role in regulating the ECF to maintain homeostasis?
They control the excretion of salts, water, waste products from cells
Do the kidneys regulate blood volume & pressure?
What eliminates certain waste products produced in the body as well as toxic substances that are ingested?
What plays a major role in the regulation of body functions?
Nervous & Endocrine systems
Which part of the nervous system controls the fx of many of the internal organs?
Does the endocrine or nervous system allow us to sense our external & internal environment?
What controls many of the metabolic fx of our cells such as growth, metabolism & reproduction?
What is secreted into the bloodstream & carried to tissues to help regulate cell fx?
Which two systems play an important role in the protection of our bodies?
Immune & Integumentary
How does the skin protect our bodies?
Protects from injury
Defense against foreign invaders
Protects underlying tissues against dehydration
T/F The skin has NO regulation in determining body temp?
F-skin does serve to regulate BT
How do most control systems of the body operate by?
A high concentration of CO2 in ECF increases pulmonary vent which decreases Co2 toward normal levels, What is this an example of?
How is the Gain calculated for NF?
Which control systems anticipate changes?
The brain uses what type of control system to cause muscle contractions?
What is adaptive control?
Delayed NF in that the brain will correct any inappropriate movements by correcting the feed forward signals to muscles the next time that particular movement is needed
Which type of control system can cause vicious cycles & death however can be useful at times?
A severe hemorrhage may lower BP so much that blood flow to heart is insuffient to maintain normal cardiac pumping which results in BP falling even lower causing more weakness to heart. What are we talking about?
When does the body us positive FB to its advantage?Explain
Generation of nerve signals
Nerve fiber stimulated-Na ions leak into cell which causes more channels to open which allows for even more Na ions to leak inside which changes membrane potential & will keep going until an action potential is generated