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
Agata [3.3K]
3 years ago
9

The first sphincter encountered in the alimentary canal is the: The first sphincter encountered in the alimentary canal is the:

pyloric sphincter. ileocecal sphincter. gastroesophageal sphincter. upper esophageal sphincter.
Biology
1 answer:
Arte-miy333 [17]3 years ago
4 0

Answer:

The correct answer is: upper esophageal sphincter.

Explanation:

The alimentary canal is a very long tract responsible for the digestion of the food. It is composed of several organs with many different and important functions. The alimentary canal also has a few sphincters, which are muscular valves that open and close when needed for the food to pass or be retained.

The first sphincter is the upper esophageal sphincter. One particularity of this sphincter is that is one of the few sphincters in the body that opens and closes under our conscious control, which happens when we decide to swallow our food.

From the first to the last, the order of the sphincters in the gastrointestinal tract is: upper esophageal sphincter, lower esophageal sphincter or gastroesophageal sphincter, pyloric sphincter, ileocecal sphincter, and anus.

You might be interested in
Natural selection involves energetic trade-offs between ________. Group of answer choices high survival rates of offspring and t
koban [17]

Answer:

The correct answer is ''high survival rates of offspring and the cost of parental care''

Explanation:

Natural selection is the differential reproduction of some genetic variants with respect to others. Natural selection favors individuals who maximize their total reproductive success throughout life, that is, it favors certain phenotypes or variants are associated with greater offspring and / or greater survival, that also means that selection will favor those who stop spending on a particular breed at the right time to invest in another, that is, the amount of energy invested in each of them. This same natural selection also favors those genes that make it effective when the body that carries them is in development to extract all possible parental investment from their parents.

7 0
3 years ago
It is important that cells make the correct proteins necessary for survival. Which of these is true concerning the processes of
Talja [164]
C.) <span>Plants produce proteins much differently than animals.

Hope this helps!</span>
5 0
3 years ago
1.how is the sound of thunder created?
Naddik [55]
1. Thunder is caused by the rapid expansion of the air surrounding the path of a lightning bolt. ... From the clouds to a nearby tree or roof, a lightning bolt takes only a few thousandths of a second to split through the air. The loud thunder that follows the lightning bolt is commonly said to come from the bolt itself.
2. thunderstorms mostly occur in rainforests. Some of the most powerful thunderstorms happen in the United States of America.

3. Cumulonimbus is a dense, towering vertical cloud, forming from water vapor carried by powerful upward air currents. If observed during a storm, these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along cold front squall lines.

4. The air cools as it rises. Water vapor condenses and forms cumulus clouds. When condensation occurs, heat (latent heat/energy ) is released and helps the thunderstorm grow. At some point, condensation high in the cloud (now in the form of water droplets and ice) falls to the ground as rain.
5 0
3 years ago
What is the blending theory of inheritance? Why did Mendel question this theory?
Elan Coil [88]
1. What is the blending theory of inheritance? Why did Mendel question this theory? The theory is that offspring have a blend, or mix, of the characteristics of their.
6 0
3 years ago
Plant cells have a ____ white animal cell do not.
masha68 [24]

Plant cells have cell wall but animal cells don't have any cell wall.

6 0
3 years ago
Other questions:
  • Need help fast please!!!
    12·1 answer
  • How does momentum and impulse affect roller coasters?
    9·1 answer
  • Carolina Bays along with cypress and gum ponds are important inland wetlands that provide habitat for a wide range of plants and
    11·2 answers
  • A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive bett
    5·2 answers
  • 20 PTS!!!+ PROMISING BRAINLIEST Why are coral reefs given the nickname “rain forests of the sea”?
    8·2 answers
  • explain how scientists can know if the wolves are having a negative or positive impact at yellowstone.
    12·1 answer
  • A _____ feeds on the waste of other living things.
    6·2 answers
  • What are some ways that living things can be classified? What characteristics should we look at when putting living things into
    7·1 answer
  • honey bees make honey from nectar that they collect from flowers nectar is a clear liquid that contains the sugar called sucrose
    6·1 answer
  • How are the nervous systems of a flatworm and a fish different?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!