0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What will be the effect of cholinergic agonist on the pyloric sphincter?
The pyloric sphincter is mediated by excitatory cholinergic vagal fibers, so a cholinergic agonist would constrict the sphincter.
Why veins in head and face don't have valves?
I assume you mean "Why do veins in the head and face lack valves?"The answer is due to being organisms with upright posture. You need valves in your legs to keep the blood from falling down to your feet, and instead propel the blood to your heart. Your head, though, is above your heart, so you don't want valves trapping the blood in the head. That would cause headaches and perfusion issues. So lacking valves allows blood to flow down to the heart.
Why are there valves between the different chambers of the heart?
The valves between the chambers of the heart are there to prevent the backflow of blood between the atria and the ventricles. (Bicuspid and Tricuspid Valves) and to prevent the backflow of blood between the Aorta and the ventricle on the left side and the ventricle and the pulmonary artery on the right side. (Semi lunar valves) If there are problems with valves, this can lead to varicous veins.
Why are stomata and guard cells called turgor operated valves?
This is so because their opening and closing is determined by their turgidity.
Which is the function of a sphincter which specific function does the pyloric sphincter have how does this aid the digestive process?
A sphincter is basically a hatch keeping stuff in and other stuff out of an organ such as the stomach. The pylorus is the muscle keeping the exit of the stomach shut, or opening it so that half-digested food may enter the duodenum to be digested further. The muscle ensures food can stay in the stomach long enough, and not flow right on through without being modified long enough by the stomach acids and digestive enzymes. It also regulates the amount of stuff that goes through.
What do you think are the functions of the pyloric valve and the cardiac valve in a pig?
The cardiac sphincter is located at the top of the stomach and controls the direction of food passing through the esophagus so that no food will re enter the esophagus. The Pyloric sphincter stops bile and digested food from entering the stomach, this valve is located at the bottom of the stomach.
The pressure exerted by food on what valve causes it to open so that food can enter the stomach?
The lower esophageal sphincter. Actually it is triggered to relax by the nervous system as part of the swallowing reflex so the question is a bit overly simplistic if not just wrong.
When semi-lunar valves close the AV valves do what?
Open so the ventricle can receive more blood to pump.
What will be the effect of cholinergic agonist on the pyloric sphincter?
The pyloric sphincter is mediated by excitatory cholinergic vagal fibers, so a cholinergic agonist would constrict the sphincter.
How can I make my heart valves healthier?
You can get a heart valve surgery to fix that. You can also avoid eating oily food that can clog up the valves. By not doing so, you are at risk of heart attacks.
Will timing chain break ruin dodge ram 1500 4.7 engine?
It can if the pistons hit the valves while they are open. The timing chain ensures that when the piston is at the op of it's storke the valves are closed. When the chain breaks the cam stops turning allowing the valves to open and close so if the piston is still trying to travel up in the cyclinder with the valves open it will hit them and bend or break them. Also trying to start the engine with the timing change broken can have the exact same result.
What are the functions of the cardiac and the pyloric sphinctors?
i dont know wat the answer is so find it out yourself
What is meant by the term valve overlap?
There is a short time between the exhaust and intake stroke where all the valves are slightly open at the same time. This period of time is called valve overlap. This is because the intake valves are just starting to open as the exhaust valves are just finishing closing. This is done so flow through the engine can be maintained at engine operating speeds.
What the function of valves?
Valves prevent blood from going backward.Valves in general open to allow or close to prevent liquid flow. Heart valves opens to let blood into the heart then close to keep it there so that when the heart muscle contracts and squeezes the blood it is then forced out into the arteries of the body.
Which heart valve is open under pressure?
When the atria contract, there is increase in pressure in the atrial chambers. So both bicuspid and tricuspid valves opened up. When both the ventricles contract, both the bicuspid and tricuspid valves get closed. This opens up the aortic and pulmonary valves.
What happens to the tricuspid and miltral valves when the heart contracts?
they open to allow the blood through then close again so the blood can't flow back
Can the valves be adjusted if so how?
can the valves be adjusted on the 454 7.4 engine
