The Nervous System
What are some functions of the nervous system?
Receiving, processing, integrating,
and responding to information
Capillary gas exchange is...
exchange of gases between the blood and the body’s tissues at the periphery; oxygen to tissues and carbon dioxide away from tissues
Systole is defined as the ______ phase of the heart within the cardiac cycle
Contraction
Exchange of gases between the air and blood officially occurs in which structure located within the respiratory zone?
Alveoli
A Neuron is....
Electrically excitable cell that
initiates, receives, & transmits
information
Cellular respiration is the use of...
oxygen in aerobic metabolism and production of carbon dioxide (within tissues)
The QRS complex of an ECG waveform (describing the electrical activity of the heart) describes:
Ventricular contraction/depolarization
When we inspire, there is a ______ in the volume of the intrathoracic cavity and a ______ in the intrapulmonic pressure
Increase, Decrease
What are components of a Neuron?
Dendrites: receive impulses &
send to cell body
Cell body: contains nucleus,
mitochondria, ribosomes, etc.
Axons: send impulses from
cell body to another neuron or
target tissue
Decrease in volume of intrathoracic cavity:
Decreases lung volume, Increases intrapulmonic pressure. Causes air to rush out of lungs (expiration)
Ejection Fraction (EF), which describes the measure of efficiency of the heart's contractile characteristics is determined by:
End-diastolic volume (EDV)/stroke volume
Airflow can be increased by all of the following except:
Decreasing the diameter of the airway
what does the Autonomic nervous
system control?
physiological functions that are unconscious
– Heart rate
– Blood pressure
– Digestion
– Breathing
Diaphragm is the most important...
inspiratory muscle
Ficks equation (oxygen delivery or VO2) =
Blood Flow x a-vO2 diff
Which of the following is NOT a peripheral input/factor to detect changes to induce pulmonary ventilatory responses?
Chemoreceptors within Medulla
Alpha Motor Neuron has short....
dendrites that receive impulses from CNS & pass it to cell body
Chemoreceptor is a receptor that responds to...
chemical changes
Which of the following is NOT a way to positively increase venous return?
Mitochondrial Uncoupling
Which of the following does NOT occur at the Ventilatory Threshold (VT)?
Both VE/VO2 and VE/VCO2 increases