BCMB 230 Lecture Notes - Lecture 21: Intrapleural Pressure, Peritubular Capillaries, Alveolar Pressure

37 views5 pages
11/15/16
The lungs are not connected to the chest wall
So how does the volume of the chest wall change with the lungs?
Plewral cavity- Space between lungs and chest cavity
Dependence upon 2 factors:
o Compliance- How easily something is stretched. In this case the lungs
o Not always linked to surfactant, but can be
o May be used in cardiovascular system- Stretch of blood vessels
Affected by:
Surfactant- Redues sufae tesio of a liuid ate
Surface of stream or pond- Insects walk across- Hydrogen bonding
greater than weight of these insect
Soap is a surfactant
Our lungs produce surfactant to prevent them from collapsing
In fetal development first sys: cardiovascular
Resp last to develop, because gas exchange is performed by the placenta.
If a baby is born before surfactant is produced it will die. Why lots of
premature babies die.
Example with a healthy and unhealthy mom in a car accident. Baby is
delivered
Baby from unhealthy mom lives because it has been producing surfactant
due to high stress levels.
o Transpulmonary Pressure- Pressure difference between alveoli and intrapleural
pressure. What keeps the lungs connected Pip-Palv= Ptp Patm-Pip=Pcw
3 spaces
o Alveolar pressure
o Atmospheric
o Intrapleural Pressure
Recoil of the chest wall and recoil of the lung causes Pip to be negative
If you poke a hole in the chest wall- Pneumothorax- Air goes into intrapleural cavity-
Lung collapses
Only one lung will collapse
Sitting on someones chest- Affects intrapleural pressure. Can lead to death.
The urinary system and kidney (Renal) function
Filtration: Blood(Glomerulas) filtate Boa’s apsule o ells o potei; stat of
the renal tubes; mixture of waste and nutrients
Reabsorption-“eletie filtate/renal tubesperitubular capillaries/blood
Renal Secretion- selective blood peritubular capillary filtrate renal tubular
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in
Tubular metabolism- Control of chemical reactions in the renal tubules to influence
blood and filtrate
Filtrate= Urine-to-be
Urine is the anatomical point where we can no longer manipulate it.
Am I regulating blood or urine
Kidneys are regulating blood/blood volume
Urine is used to regulate what is in the blood.
Several ways to measure the concentration of solute
Yellow pigment- Produced by liver hemoglobin bilirubin Goes to feces to make it
brown and urine to make it yellow
Specific gravity- Heavier things have higher specific gravity
Water(1.000) Salt (1.030)
Specific gravity can be measured by a hydrometer/urometer. Where the water floats=
level of solute concentration
Need lot’s of olume for the hydrometer to work
Urinary system 4 organs: Figure 14.1
Physiology in the kidney
2 regions
Outer- Cortex
o Lot’s of ey fie tues lood essel eal
Inner-Medulla
o Large tubes
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in

Document Summary

In fetal development first sys: cardiovascular: resp last to develop, because gas exchange is performed by the placenta. If a baby is born before surfactant is produced it will die. Why lots of premature babies die: example with a healthy and unhealthy mom in a car accident. Baby is delivered: baby from unhealthy mom lives because it has been producing surfactant due to high stress levels, transpulmonary pressure- pressure difference between alveoli and intrapleural pressure. What keeps the lungs connected pip-palv= ptp patm-pip=pcw: 3 spaces, alveolar pressure, atmospheric. Intrapleural pressure: recoil of the chest wall and recoil of the lung causes pip to be negative. If you poke a hole in the chest wall- pneumothorax- air goes into intrapleural cavity- Lung collapses: only one lung will collapse, sitting on someones chest- affects intrapleural pressure. Where the water floats= level of solute concentration: need lot"s of (cid:448)olume for the hydrometer to work.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents