Mark the correct pair of muscles involved in normal breathing in humans.
(a) External and internal intercostal muscles
(b) Diaphragm and abdominal muscles
(c) Diaphragm and external intercostal muscles
(d) Diaphragm and intercostal muscles
Mark the correct pair of muscles involved in normal breathing in humans.
(a) External and internal intercostal muscles
(b) Diaphragm and abdominal muscles
(c) Diaphragm and external intercostal muscles
(d) Diaphragm and intercostal muscles
(d) Correct option is D)
There are two stages that are involved in the breathing process:
- Inspiration in which atmospheric air is taken in.
- Expiration in which alveolar air is released.
The pressure within the lungs is less than the atmospheric pressure then inspiration takes place and the pressure is called intrapulmonary pressure. This pressure is also referred to as negative pressure in the lungs. The intramolecular pressure is higher than the atmospheric pressure then expiration takes place. The generation of various gradients between the ribs is done by the diaphragm and specialized set of muscles external and internal intercostal.
The ribs extend from the front and go around the back, bend in the ribs is called internal intercostal muscles whereas the ribs that wrap around the back of the rib almost to the bony end part in the front are called external intercostal muscles.
The intra-abdominal pressure controls the diaphragm by contraction with the abdominal muscles during the process of breathing. The muscles which are situated between the ribs and the pelvis on the front of the body are called abdominal muscles. So, the correct answer is 'Diaphragm and intercostal muscles'.
(d) Correct option is D)
There are two stages that are involved in the breathing process:
- Inspiration in which atmospheric air is taken in.
- Expiration in which alveolar air is released.
The pressure within the lungs is less than the atmospheric pressure then inspiration takes place and the pressure is called intrapulmonary pressure. This pressure is also referred to as negative pressure in the lungs. The intramolecular pressure is higher than the atmospheric pressure then expiration takes place. The generation of various gradients between the ribs is done by the diaphragm and specialized set of muscles external and internal intercostal.
The ribs extend from the front and go around the back, bend in the ribs is called internal intercostal muscles whereas the ribs that wrap around the back of the rib almost to the bony end part in the front are called external intercostal muscles.
The intra-abdominal pressure controls the diaphragm by contraction with the abdominal muscles during the process of breathing. The muscles which are situated between the ribs and the pelvis on the front of the body are called abdominal muscles. So, the correct answer is 'Diaphragm and intercostal muscles'.
