a. What factors determine lung compliance?
b. Describe the role of pulmonary surfactants in stabilizing the
alveoli to ensure that smaller ones do not collapse into larger
ones.
c. At the end of normal respiration, a person has a lung volume
of 3 L, alveolar pressure of 0 mmHg and trans-chest-wall pressure
of -2 mmHg. At the end of inspiration, this person has inhaled 500
mL of fresh air into the alveoli, and the alveolar pressure is 0
mmHg while...
In the dataset airways (see R code), we have the change in
airflow from moderate exercise for 19 subjects under 2 different
exposure conditions – regular air (air) and 0.25% sulpher dioxide
(so2).
a) Look at the correlation, and use the t-table to test the null
hypothesis that air flow change under these two conditions is
uncorrelated. Test at significance level 0.05. Show your work.
b) Use a linear model and the summary function in R to test the
null...
Which statement about mammalian blood flow is NOT true?
Select one:
a. The pulmonary veins carry oxygen rich blood from the lungs
into left atrium.
b. The right atrium receives oxygen poor blood from veins and
contracts, forcing blood into the right ventricle.
c. The left ventricle contracts and sends oxygenated blood into
the aorta, which sends it to body tissues.
d. The systemic circuit carries blood between heart and lungs;
CO2 diffuses into blood from lungs and O2 diffuses...
1- Describe, with the aid of diagrams, the structure and
functions of the airways as they transition from the trachea to the
terminal bronchioles.
2- Describe, with the aid of diagrams, the oxygen-haemoglobin
dissociation curve and how it relates to the function of
haemoglobin.
1. Outline the steps of electrical conduction through the
mammalian heart.
2. What is the importance of the skeletal muscle and respiratory
pumps?
3. What happens to heart rate, stroke volume, cardiac output,
mean arterial pressure, and patterns of blood flow at the onset of
exercise in humans?
Describe the mitochondrial electron transport pathway and the
synthesis of ATP by mammalian mitochondria.
Describe the urea cycle including its function, energy costs and
regulation.
If palmitic acid (16:0) labeled in C-1 were metabolized under
anaerobic metabolism in mammalian tissues, what carbon atom would
be tagged with 14C in what compound?