HUMAN PHYSIOLOGY
BREATHING AND RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
It is voluntary action
|
|
|
High acidity in blood stimulates nerve response
|
|
|
CO2 levels are the regulating factor of breathing rate
|
|
|
The parasympathetic nervous system speeds up breathing rate
|
Detailed explanation-1: -The rate and depth of breathing is automatically controlled by the respiratory centers that receive information from the peripheral and central chemoreceptors. These chemoreceptors continuously monitor the partial pressures of carbon dioxide and oxygen in the arterial blood.
Detailed explanation-2: -The level of carbon dioxide (CO2) in our body is what controls your breathing. When carbon dioxide reaches a certain level, a signal is sent from the breathing center in your brain stem to the breathing muscles, which triggers an inhalation. Upon exhalation, we exhale carbon dioxide and a new breathing cycle starts.
Detailed explanation-3: -The precise monitoring of CO2 levels in the body is crucial because too much of it makes our blood acidic, which can have toxic effects. Under normal resting conditions, the concentration of CO2 controls our respiratory rate. For example, in most animals, including humans, high levels of CO2 lead to faster breathing.