Certain muscles produce the movement of air through the respiratory tract. In th
ID: 3519170 • Letter: C
Question
Certain muscles produce the movement of air through the respiratory tract. In the following diagram, name, or two of these muscle groups.
#1 During the external intercostal muscles contract during inhalation to _______ the volume of the cavity. Increase or decrease
#2 During the external intercostal muscles contract during inhalation to _______ the volume of the cavity. Increase or decrease
The volume of ain moving the lungs can be measured using an instrument called a spirometer. In the experimental setup, a male test subjects SIxer.
#3 How many times did this subject inhale during the recording period? Enter the number here: ---------
#4 The test subject's resting tidal volume is represented by the letter ___(A,B,C,D,E)____ and is approximately _____L Either: 1.6L, 6.0, 0.7, and 4.9)
#5 At the time of recording indicated by the star symbol, which of the following muscles are concentrated? Check up
Internal intercostal
Check or not
Imagine you test a second, similar subject on the spirometer. This person visibly has to exert effort to exhale the volume of air through his lungs, which the first did not. Given this information, and all else being equal, it is reasonable to support that the second subject has a ___(1)____ level of _____(2)____ in this lung.
(1) lower or higher
(2) elastic recoll.
One of the most important factors affecting the diffusion of gases into and out of the bloodstream is the concept of partial pressure. Partial pressure is the pressure exerted by a specific gas as part of a mixture of gases (in other words, the part of the overall pressure due to that specific gas). For example, 21% of Earth's atmosphere is oxygen (O2). At sea level, which has an atmospheric pressure of 760 mm Hg, the P_O2 is 21% of 760, or 0.21 x 760, which gives us 160 mm Hg.
For another example, consider the following: So-called oxygen bars are a fad that has waxed and waned over the last couple of decades. Oxygen bars provide patrons with nasal tubes of scented, concentrated O_2, claiming that inhaling the extra oxygen provided health benefits. O_2 concentrations can vary, but the average is about 40%. Assuming that the air pressure is the same as at sea level, what is the P_O2 in these breathing tubes? ---------- mm Hg
Question:
Which of the following methods describe ways one could change the P_O2 in this environment? Check all that apply. (No number need)
a. Increase or decrease the concentration of other gases in this atmosphere
b. Increase or decrease the concentration of oxygen in this atmosphere
c. Increase or decrease the air pressure in this atmosphere
Abdominal Muscle Check or NotInternal intercostal
Check or Not External intercostal check or not diaphragmCheck or not
plia Homework: The Respiratory System Due Today at Noon PDT Certain muscles produce the movement of air through the respiratory tract. In the following diagram, name or describe the role of two of these muscle groups. Internal intercostal muscles The external intercostal muscles contract during inhalation to increase the volume of the chest cavity. During inhalation, the diaphragm _decreases the volume of the chest cavity.Explanation / Answer
Answer 1 and 2) The question is not clear in language. However conceptually, when the internal intercostals contract, they pull the rib cage inward, thus reducing the volume of thoracic cavity and causing expiration. Internal intercostals only contract during forced expiration.
When the external intercostals contract, they pull the rib cage outwards, this leads to an increase in volume, thus a decrease in pressure and thus inspiration occurs.
So for answer 1 and 2, correct word for gap filling must be 'increase'
Answer 3) There is a simple trick to calculate number of times inspired via a spirogram. We know that inspiration will cause rise in intrapulmonary volume of gases. This will lead to upward deviation of graph. So, the number of times curve deviates upwards is the number of times person inspired.
Here the curve deviated upward 9 times( 4+2+3 times)- so person inspired 9 times.
Answer 4) Tidal volume is the amount of air inspired and expired normally per breath. Its standard value is 500 mL. Letter D denotes the tidal volume. In the given options, closest value to 0.5L is 0.7L and thus it is the correct answer.
Answer 5) At time of star, the expiration process is complete and inspiration is about to begin. At this time, diaphragm and external intercostal must contract to increase the volume of thoracic cavity and cause inspiration.
Internal intercostal is an inspiratory muscle and only contracts in forced breathing.
Abdominal muscles are only used during forceful breathing.
Answer 6) If a person has to exert a greater level of force by muscles to cause expiration, this implies that his alveoli must have exerted a lesser force and the excess muscular force was compensatory. Therefore, the elastic recoil must be lesser than usual.
So gaps must include lower and elastic recoil respectively.
Answer 7) This is simple unitary mathematics. Partial pressure of a gas is only dependent on its own concentration. Now, since the total pressure remained constant- therefore partial pressure of some other gas must have been reduced in oxygen bars; however this is not our concern.
We know, 21 percent of 760 is 160. Now if oxygen is 40 percent, its partial pressure must be 40 percent of 760 which is 304 mm Hg.
Answer 8) As we previously mentioned, oxygen partial pressure will only be affected by changing moles of oxygen. Therefore adding or subtracting other gas will not change oxyegn partial pressure.
Adding or subtracting oxygen moles will change oxygen partial pressure thus option B is right.
Now, for option 3, both scenerios are possible. If the total atmospheric pressure is reduced by removing some gas other than oxyegen then no effect will occur.
But if in reduction in oxygen moles also occurs while reducing total pressure, oxyegn partial pressure will vary.
However, in general sense we will consider option 3 also correct.