Nervous System
The ability of an organism or cell to maintain internal equilibrium by adjusting its physiological processes to keep functions in limits
homeostasis
What is the contraction phase where blood is pumped out of the heart chamber?
systole
What is pulmonary ventilation?
movement of air into and out of the lungs or breathing
What is the sympathetic nervous system's response to survival and stress?
fight or flight
Blood flows from areas of ___ pressure to areas of ___ pressure.
high; low
airflow = P1 - P2 / Resistance
parasympathetic nervous system
What is blood composed of?
plasma (55%), white blood cells and platelets (<1%), and red blood cells (45%)
The rate of gas transfer (V gas) is proportional to the tissue surface area, the diffusion coefficient of the gas, and the difference in the partial pressure of the gas on the two sides of the tissue, and inversely proportional to the thickness.
V gas = A x D x (P1-P2) / T
What receives signals from tendons, joints, skin, muscles, eyes, nose, ears, tongue, etc.?
sensory division
Increased Q, increased oxygen delivery to muscle, and increased endurance performance are all example of adaptations to what?
endurance training
Where does gas exchange take place?
in the alveoli
What division initiates the contraction of muscles and limb movements?
motor division
What is vasoconstriction?
Name four muscles that elevate the ribs during inhalation
1. external intercostals
2. scalenes
3. sternocleidomastoid
4. pectoralis major