Abdominal breathing occurs when the abdomen rises and falls with each breath but the chest does not. if a person is breathing abdominally, what would this suggest?

select one:
a. his rib muscles are no longer contracting with each inspiration.
b. his diaphragm is no longer contracting with each inspiration.
c. his diaphragm is no longer contracting with each exhalation.

The correct answer is-

a. His rib muscles are no longer contracting with each inspiration.

The muscles that are involved in the process of breathing ( inspiration and expiration) are diaphragm ( that separates chest cavity and the abdominal cavity), intercostal muscles, and accessory muscles.

Abdominal is also known as diaphragmatic breathing, which is the most  efficient as well as relaxed way of taking air into the lungs. During inspiration, the external intercostal muscles and diaphragm undergo contraction, which causes the expansion of rib cage leading it to move outward.

On the other hand, during exhalation, the abdominal muscles and internal intercostals participate in forcing the air out of the lungs.

This suggests that rib muscles are no longer contracting with each inspiration in case of  breathing abdominally.

sadness is not good

explanation:

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.