Answer:
Varicose veins can best be described as veins cannot prevent the backflow of blood.
Explanation:
Varicose veins are a manifestation of venous insufficiency or peripheral vascular insufficiency.
Veins are blood vessels that, unlike arteries, are not able to contract, so they depend on gravity, muscle contractions and a system of valves to be able to carry blood to the heart.
<u>When the venous valves do not work, the blood is not transported properly, backflow occurs and is retained, producing dilation of the vein walls, which is characteristic of varicose veins</u>. In this case, veins cannot prevent the backflow of blood.
The other options are not correct because:
- <em>Varicose veins do not lose their ability to transport blood.
</em>
- <em>Veins cannot be used to transport blood from the heart.
</em>
- <em>Failure to adequately transport waste to the heart does not apply in this case.</em>
Answer:
this all depends on your age and weight etc...
Explanation:
but the average human needs at least 8 hours of sleep and 8 cups of water a day.
if your healthy it means you eat well and your weight is at the normal weight. exercise if you go out and run or lift weights etc...
Answer:
Increased heartbeat
Explanation:
From the perspective of classical conditioning, the unconditioned response or reaction is an unlearned reaction that happens normally in response to the unconditioned stimulus.
For instance, if the smell of nourishment is the unconditioned improvement, the sentiment of appetite because of the smell of nourishment is the unconditioned reaction.
Similarly, In the experiment, the male subject's heart beat increases as a response to the specific piece of music, is an unconditioned response.
