# Shared Flashcard Set

## Details

Biol 224 3rd Lab quiz
Biol 224
22
Biology
05/24/2012

Term
 What is the tidal volume?
Definition
 The amount of air that moves in or out of the lungs during only one breathing cycle while the subject is at rest
Term
 What is the amount o fair that moves in or out of the lungs during any one breathing cycle while the subject is at rest?
Definition
 The tidal volume
Term
 What factors influence diffusion of gasses between lungs and the blood?
Definition
 Respiratory surface area. Diffusion distance. Concentration gradient.
Term
 What is a high concentration gradient in the lungs sustained by?
Definition
 1) movement of blood with low O2 and high CO2 levels to the lungs 2) pulmonary ventilation (breathing)
Term
 What is the inspiratory reserve volume?
Definition
 It is the additional air that can breathed in after normal inspiration.
Term
 What is the expiratory reserve volume (ERV)?
Definition
 Expiratory reserve volume is the additional volume that can be exhaled after regular expiration.
Term
 What is the residual volume?
Definition
 Residual volume is the reserve volume that cannot be exhaled from the lungs. It sustaines the shape of the alveoli.
Term
 What is the vital capacity?
Definition
 the vital capacity is the maximal volume of air that can be exchanged during a single breathing cycle. Represents the maximal TV possible for an individual.
Term
 Where are the adjustments in the tidal volume and breathing rate regulated by
Definition
 in the respiratory center of the medulla oblongota.
Term
 What is the equation for breathing rape?
Definition
 Breathing rate (breaths/min) = 60 seconds/min / mean breath period (sec/breath)
Term
 How do you calculate Total lung capacity from residual volume?
Definition
 TLC = VC/0.75
Term
 What is the equation to calculate vital capacity in men and women?
Definition
 VC (male subject) = (o.052H) - (0.022A) - 3.60 VC (female subject) = (0.041H) - (0.018A) - 2.69
Term
 what is the nervous system that adjusts the cardiac function to meet the immediate needs of body tissues?
Definition
 The autonomic nervous system
Term
 On an ECG, a change in heart rate would be measured as a change in what?
Definition
 As a change in the P-P interval.
Term
 An increased heart rate is measured by what in an ECG recording?
Definition
 Its accomplished by reducign the time between beats, the T-P interval.
Term
 The overall depoarization/repolarization cycle occurs where in an ECG recording?
Definition
 complete depolarization/repolarization cycle occurs between the P-T cycle.
Term
 Which autonomic nervous system influences the heart during fight or flight? what does it release?
Definition
 In a fight or flight response the sympathetic nervous system releases epinephrine from the adrenal glands. binds to heart and causes it to beat faster.
Term
 Which autonomic nervous system influences the heart during relaxation? what does it release?
Definition
 The parasympathetic nervous system releases acetylcholine from the vagus nerve which binds to receptors of the heart and causes it to beat more slowly.
Term
 What is the baroreceptor reflex?
Definition
 It is a feedback loops that normally acts to coordinate heart activity, arterial blood pressure and peripheral blood pressure.
Term