Question

Activity 3: Determining Respiratory Volumes and Capacities at Rest and Following Exercise 1. Respiratory volumes can be measured/calculated), whereas respiratory capacities are (measured/ calculated). Circle the correct answers. 2. Identify the various lung volumes and capacities in the following diagram. 6000 5000 + Lung volume V h Normal breding . expiration 1000+ - Volume of a a 3. Describe the effects of exercise on each of the following quantities a. ERV: b. IRV: c. TV: Activity 4: Investigating the Control of Breathing 1. Explain the relationship between blood Co, levels and blood pH. 568 UNIT 26 Physiology of the Respiratory System

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Answer 1

Respiratory volume can be Measured, whereas respiratory Capacities are Calculated Explaination Respiratory volumes are directly can be measured by Spirometer, when rects, Respiratory Capacities are Calculated by various respiratory volume, Inspiratory reserve volume can be Calculated Tidal volume can be Calculated But vital Capacities are is calculated by Summing Up IRV +TV+ERV. a) IRV - Inspiratory Reserve Volume (3000 ml) It is the maximum volume of AIR that can be Inhaled after normal inspiration. = Tidal Volume (so It is the volume of AIR that can be ventilated during normal breathing ) ERV = Expiratory Reserve Volume ( 12.00 ml) It is the maximum volume of air that Can be expaled after normal expiration.

d) RV = Residual volume (Booml) It is volume of air that always present in long and cannot be directly measured by spirometer O me) e) IC - Inspiratory capacity (3500 m It is summation of IRV and TV. f) FRC = function Residual volume B and ERV It is Summation of g) vc a vital Capacity It is summation of IRV+ TV + ERV b) The = Total Lung Capacity It is total amount of air that can be accomodate in lung . a) ERVE ERN is the maximum volume that can be expaled during normal /resting state. to dop increased b) IRV : Increase during exercise due depth of breathing and - c) TV :- Increases during exercise due to increased depth of breathing.

activity-4 Relationship between CO2 and blood pH CO₂ + H₂O CH H₂CO₃ = H + 1C05 from this equation, we can say that increased concentration of CO2 in blood will o increases H₂CO₃ formation which will dissociate into Ht and HCO3 so proportion to Concentation of CO₂ in blood is directly the concentration of Ht Hence. CO2 in blood a Acidity & B