1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PolarNik [594]
3 years ago
14

The net filtration across relaxed skeletal muscle capillaries is about 0.005 mL/min per 100 g of tissue. Assume the following va

lues: the density of muscle is 1.08 g/cm3; the length of the capillaries is 500 μm and their cross-sectional density is 250 capillaries/mm2. Their average radius is 4 μm. Pressure at the arteriolar end of the capillary is 40 mm Hg and it decays linearly to 15 mm Hg at the venule end. The oncotic pressure of plasma is 25 mm Hg. Interstitial fluid pressure in relaxed muscle is -1 mm Hg and intersitial fluid oncotic pressure is 5 mm Hg
a. Calculate the surface area of the capillaries per 100 g of muscle. (Hint: calculate the mass of muscle 250 mm2 in cross-section and 500 um long)
b. Does the capillary filter fluid along its entire length, or does it reabsorb fluid at the venule end? Support your answer with calculations based on the givern information.
Medicine
1 answer:
algol [13]3 years ago
3 0

Answer:

0.58 m²/100 g

Explanation:

Let us consider a chunk of muscle with a cross-sectional area of 1 mm² and which 500m long. If this chunk contain 250 capillaries and each with 4m radius long .

Now if we calculate the muscle slab weight along with the surface area of capillaries in the muscles. To calculate the surface area per unit weight of muscle we will neee to divide the surface area of capillaries that are there in the muscle to the area by the mass of the muscle long.

This slab of muscle contains 250 capillaries with a radius of 4m each. We calculate how much this muscle slab weighs,

how much surface area of capillaries there are in the muscle,

and then we will divide the area by the mass of the muscle to find the surface area per unit weight of muscle

The volume of the piece of muscle is;

=1 mm²  x 500 x 10⁻⁶ m

= 1 mm²  x 0.5 mm

= 0.5 mm³

Now  since 1cm = 1000mm

Therefore, the volume will be equal to

= 0.5 x 10⁻³ cm³

And its mass is 0.5 x 10 ⁻³ cm³ x 1.08 g cm⁻³

= 0.54 x 10⁻³ g

surface area of a single capillary is = 2B × r × l

where;

r = radius, l = length

∴ surface area = 2 B x 4 x 10⁻⁶ m x 500 x 10⁻⁶ m

= 12566 x 10⁻¹² m²

Now for 250 capillaries the total surface area is 250 x 12566 x 10⁻¹² m²

= 3141500 x 10⁻¹² m² in a mass of muscle that weighs 0.54 x 10⁻³ g.

So the surface area of capillaries is 3.1415 x 10⁻⁶ m²/ 0.54 x 10⁻³ g

= 5.818 x 10⁻³ m² g⁻¹ x 1 g /100 g

= 0.58 m²/100 g

You might be interested in
Why do desert women know about survival? List 5 reasons why?
aliya0001 [1]

Answer:

Explanation:

1) The heat and cold has thickened their skin

2) They do not have many supplies so they will have to deal with what they have.

3) They will have faced many hard days and know what to do to prepare

4) They know when to make their move.

5) They are used to many things and know what to do at what time.

3 0
3 years ago
In a patient who has an open chest wound, the sound of air rushing with exhalation and a characteristic sound with inhalation is
DiKsa [7]

Answer: D. Sucking chest wound

Explanation:

A sucking chest wound is a wound that is caused by the hole inside the chest. This can be caused by the gubshot injury, puncture wound and stabbing. It makes a path in the chest for the air. Inhalation and exhalation of air produces a characteristic sound.

8 0
3 years ago
What are then tubes that carry blood back to the heart
lakkis [162]
The blood vessel is the tube that carry’s blood to heart
4 0
3 years ago
Read 2 more answers
Basophils are O granules a) involved in the process of making hemoglobin. b) involved in the allergic process. Q) that resist in
astraxan [27]
Basophils contain large cytoplasmic granules which obscure the cell nucleus under the microscope when stained. However, when unstained, the nucleus is visible and it usually has two lobes. ... Both cell types store histamine, a chemical that is secreted by the cells when stimulated.
5 0
3 years ago
The inability or unwillingness to express thoughts and feelings is *
Aneli [31]

Answer:

<h2>reactive attachment disorder</h2>

<h3>It depends. If you are not aware of your thoughts and feelings and therefore cannot express them then you may have reactive attachment disorder or something like it.</h3>

hope it helps follow please...

6 0
3 years ago
Other questions:
  • What do you view as important issues within healthcare<br> delivery?
    9·1 answer
  • Body systems working together to combat pathogens are example of what type of immunity
    9·2 answers
  • Icd 10 code for urinary frequency and urgency
    12·1 answer
  • The hallux is the __digit of the foot.
    15·1 answer
  • He information gathered in the "Five Ws," where, what, when, who, and weapons, will help you articulate the call over the radio
    6·1 answer
  • SNJ meas in<br>nursing language​
    7·1 answer
  • Macronutrients (needed in relatively large amounts) are often listed as CHONPS. What does each of these letters indicate, and wh
    6·1 answer
  • Which white blood cells produce antibodies to fight<br> microbes?
    5·1 answer
  • Blood is taken from veins not from arteries. Why?​
    13·1 answer
  • Health maintenance organizations (HMOS) are the oldest type of managed care. Members must see their primary care provider first
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!