Regulating Gas Concentrations

Question 1

REGULATING GAS CONCENTRATIONS
Stimulus: high ____ conc. in blood, high H+ ions in blood = low pH, low o2 conc
Receptors: chemoreceptors in m______ o________ + aortic & c______ bodies
Modulator: medulla oblongata r__________ c_____
Effector: inter______ muscles via inter______ nerve + d________ via p______ nerve
Response: b________ rate increases
Feedback: decreases co2 conc decreased __ ions, _________ pH levels

Answer 1

Co2
Medulla oblongata, carotid
Respiratory centre
Intercostal, intercostal, diaphragm, phrenic
H+, increased

Question 2

EMPHYSEMA
Stimulus: high Co2 conc. = high H+ ____, low blood __
Receptor: ______________ in medulla oblongata + a______ & carotid bodies
_________: medulla oblongata respiratory centre
Effector: intercostal _______ via intercostal _____ + _________ via phrenic nerve
Response: ________ breathing rate
ISSUE: alveoli # reduced = inefficient gas exchange
Feedback: high Co2 conc = high H+ ____ = low blood __

Answer 2

Ions, pH
Chemoreceptors, aortic
Modulator
Muscles, nerve, diaphragm
Increased
Ions, pH