<u>Answer:</u>
<u>A, B and C. All have same blood flow.</u>
<u>Explanation:</u>
The hemodynamic relation between blood flow (F), resistance (R) and pressure difference (ΔP) can be expressed as
F = ΔP/R
<u>RESISTANCE:</u>
Since the three blood vessel segments are of equal length and diameter, it implies that all three blood vessel segments possess equal resistance.
Since the resistance is same in all vessels therefore, in this case blood flow depends on pressure differences.
<u>PRESSURE DIFFERENCES:</u>
ΔP in vessel segment (A):
100-70= 30 mmHg
ΔP in vessel segment (B):
80-50= 30 mmHg
ΔP in vessel segment (C):
60 -30 = 30 mmHg
<u>CONCLUSION:</u>
Since the pressure differences is same i.e. 30 mmHg in all vessel segments and resistance is also same, therefore blood flow will be same in all vessel segments.
I believe the answer is acetyl CoA
Because it is malleable and doesn't melt/burn easily.
Answer:
The correct order is dehydration, embed in wax, cut into sections, staining
Explanation:
There are certain proceedings needed to obtain stained sections of vegetable or animal tissues for their microscope observations.
These steps are:
- Obtention of the material: The tissue is cut to an adequate size.
- Fixation: When tissues are extracted from the organism, they suffer autolysis and putrefaction, so they need to be fixated in order to keep their cells in the best state possible. Fixation involves preserving the original morphological and molecular characteristics of the tissue. Fixation avoids autolysis, putrefaction, distortion, and retraction of cells and the tissue that could affect its volume or morphology.
- Dehydration. Once fixated, the fixator must be eliminated and the tissue is dehydrated by using a gradual series of solutions with alcohol in ascendant concentrations. Dehydration must be gradual to avoid tissue deformation.
- Inclusion. To obtain thin cuts that can be observed under the optic microscope, the tissues must be included in a consistent, firm substance, that might be either hydrophilic or hydrophobic. A hydrophobic medium is paraffin wax, that provides hardness and plasticity.
- Cut. The tissue included in wax must be cut in slides or sections thin enough to allow the diffusion and penetration of light. A microtome is used to perform these cuts. When using paraffine for tissue inclusion, the cuts are about 5 to 20 micrometers of thickness.
- Stain. Once the cuts are performed, paraffin wax must be eliminated. This can be done by using an organic solvent. Then the tissue must be stained. Hematoxylin and Eosin are the most common dyes. Animal tissues in general do not have any natural color, so they need to be stained to be observed.
<span>He will experience a gradual drop in his testosterone levels as he ages. This will cause a lowered amount of energy and could cause a slight gain in weight. In addition, he may experience fatigue, a loss of body hair, and a general decrease in his strength.</span>
