Chapter 5
What is Homeostasis?
Ability of an organism or cell to maintain internal equilibrium by adjusting its physiological processes to keep functions in limits
Site of gas and nutrient exchange
Capillaries
Double layered sac that encases each lung
Pleura
What is the purpose of the negative feedback loop?
Diminishes intensity of process to return to initial status quo
•Example: increased body heat triggers sweating mechanism, which cools body
What part of the heart is known as the pacemaker
The SA node
A decrease in this is detrimental to oxygen transport
What part of the neuron sends impulses to another neuron or target tissue?
Axon
Where in the heart does is have the highest pressure
Left aorta
What result in a rightward shift in the O2-Hb dissociation curve
Increase in blood temperature
What are the 2 divisions of the PNS
Autonomic nervous system
somatic nervous system
What part of an ECG reading signifies ventricular contraction
QRS complex
Where are peripheral chemoreceptors located
Carotid arteries and aortic arch