Key Points
Digested food is able to pass into the blood vessels in the wall of the small intestine through the process of diffusion.
The inner wall, or mucosa, of the small intestine is covered in wrinkles or folds called plicae circulares that project microscopic finger-like pieces of tissue called villi, which in turn have finger-like projections known as microvilli.
The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients.
Each villus transports nutrients to a network of capillaries and fine lymphatic vessels called lacteals close to its surface.
Key Terms
villi: Tiny, finger-like projections that protrude from the epithelial lining of the intestinal wall.
plicae circulares: These circular folds (known as the valves of Kerckring or the valvulae conniventes) are large, valvular flaps that project into the lumen of the bowel.
diffusion: The act of diffusing or dispersing something, or the property of being diffused or dispersed; dispersion.The Small Intestine
The small intestine is the part of the gastrointestinal tract between the stomach and the large intestine where much of the digestion of food takes place. The primary function of the small intestine is the absorption of nutrients and minerals found in food.Digested nutrients pass into the blood vessels in the wall of the intestine through a process of diffusion. The inner wall, or mucosa, of the small intestine is lined with simple columnar epithelial tissue.
Structurally, the mucosa is covered in wrinkles or folds called plicae circulares—these are permanent features in the wall of the organ. They are distinct from the rugae, which are non-permanent features that allow for distention and contraction.
From the plicae circulares project microscopic finger-like pieces of tissue called villi (Latin for shaggy hair). The individual epithelial cells also have finger-like projections known as microvilli. The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients.
Each villus has a network of capillaries and fine lymphatic vessels called lacteals close to its surface. The epithelial cells of the villi transport nutrients from the lumen of the intestine into these capillaries ( amino acids and carbohydrates) and lacteals (lipids).
The absorbed substances are transported via the blood vessels to different organs of the body where they are used to build complex substances, such as the proteins required by our body. The food that remains undigested and unabsorbed passes into the large intestine.
How do I work this question out I’m struggling
Name 2 features/tools in Drive that makes it easy to collaborate on assignments?
if you think about fat as old stuff,what new stuff can be made from it
Answer:
Paints, Lubricants, Biofuel, Face cream, Soap,
Explanation:
Fat is derived from plant and animal sources. They include seeds, fruits, fatty fish.
Fats serve as a source of energy in organisms and also serve as insulation.
If you think about fat as old stuff,what new stuff can be made from it means of the things fats can be made from and they include Paints, Lubricants, Biofuel, Face cream, Soap etc. These products are manufactured in industries on a large scale due to their high demand.
Answer:
Paints, Lubricants, Biofuel, Face cream, Soap,
Explanation:
how does the cell wall contributes towards maintaining homeostasis in the cell
Answer:
The water wants to flow from the higher concentration, which is outside of the cell, to the lower concentration, which is inside of the cell. The cell membrane helps to regulate and slow down the flow of water into the cell. This is yet another way that the cell membrane helps maintain homeostasis.
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-gene 1
-gene 2
-gene 3
How are these three genes related?
Answer:
Depends on the locations of these gene segment on the chromosome whether it be found on the same or different.
It can either be linked or unlinked.
Why does the land around a once active coal mine remain barren?
A: Toxic nitrous oxides were released into the soil killing all plants.
B: C: Ozone is formed from hydrocarbons which prevent the growth of plants.
Please don't just take points. Thank you and have a good day
Hello!!
The answer is A. Toxic nitrous oxides were releassed into the soil killing all plants
Answer:
Empty coal mines are flooded with acid rain so no life forms can survive.
Explanation:
explain the gaseous exchange in lungs
Answer:
Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
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Tysm!
Answer:
breathing allows the exchange between 2 gases: oxygen and carbon dioxide. Gas exchange occurs in millions of lung alveoli and the capillaries that surround them
Explanation:
Protects the cell and controls what enters and leaves the cell
Answer:
- Endoplastic reticulum
-cell membrane
-ribosomes
-mithocondrion
^ all the ansers
Explanation:
Cell membrane protects the cell and controls what enters and leaves the cell. So, the correct option is (C).
What is Cell Membrane?
The cell membrane is also called the plasma membrane. It is composed of a semipermeable lipid bilayer that regulates the transport of materials into and out of the cell. It protects the cell and provides a stable environment within the cell, and this membrane serves many functions.
The main function of the cell membrane is to transport nutrients into the cell, while another is to remove toxins from the cell. Cellular membranes are composed of glycerophospholipids, which are molecules composed of glycerol, a phosphate group, and two fatty acid chains.
Thus, Cell membrane protects the cell and controls what enters and leaves the cell. So, the correct option is (C).
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Your question is incomplete, most probably complete question is:
_____Protects the cell and controls what enters and leaves the cell
A) cell wall
B) lysosomes
C)cell membrane
D)Vacuole
what type of cash crops have been genetically modified..... please help!!!!!
Answer:
Most food modifications have primarily focused on cash crops in high demand by farmers such as soybean, corn, canola, and cotton. Genetically modified crops have been engineered for resistance to pathogens and herbicides and for better nutrient profiles.
Explanation:
Ultra-high-temperature sterilization effectively reduces microbes that cause spoilage. removes only mesophilic microbes. reduces microbes that cause disease. removes all microbes that cause diseases or spoilage. reduces microbes that cause disease or spoilage.
Answer:
kills all microbes that cause disease or spoilage.
Explanation:
There are different methods of sterilization, such as ultraviolet radiation, autoclave mechanisms, etc.
The sterilization mechanisms eliminate the microorganisms completely, thus generating sterile surfaces.
These mechanisms are used with surgical instruments, the operating room environment.
The autoclave method is the most widely used today due to its economical price, its ease of use and its practicality.
Sterilization methods must be strictly controlled with pilot or test microbiological cultures to be able to corroborate that these mechanisms function correctly, since otherwise they could trigger strong pathologies due to cross contamination.
carbohydrate are store in animal cell in the form of
Answer:
molecule glycogen
Plants store carbohydrates in long polysaccharides chains called starch, while animals store carbohydrates as the molecule glycogen.
The opposable thumb is a trait that connects us to other primates; allowing us to grab and use tools and increasing chances for survival. This means it is a(n) __________.
Answer:
The options to this question are;
A. genotype
B. adaptation
C. selective pressure
D. stabilizing pressure
The answer is B) Adaptation
Explanation:
Adaptation is the process whereby an organism becomes well suited to survive in its natural environment, which is aided by the possession of certain traits called adaptive features. For example, the fins of a fish makes it fit to survive in an aquatic environment, likewise the opposable thumbs of humans make us well suited to survive in our environment.
As stated in the question, the opposable thumb i.e. movement of the thumb independently of the other four fingers, is a characteristics of primates. This unique feature (opposable thumb) allows us to grab things, get a good grasp of tools, use tools effectively, write things, etc. All these ability due to the possession of opposable thumb increases our chances of survival. Hence, the possession of opposable thumb is regarded as an ADAPTATION
What can you learn about by studying DNA?
Answer:
Explanation:
The study of human DNA and genetics can be intellectually fascinating, but it also has plenty of practical applications. From the use of DNA in court cases to the discovery of new therapies for genetic diseases, a thorough understanding of the human genome can have important medical, social and legal impacts.
HELP
In humans, ventilation, digestion, and blood flow are important biological processes. Explain the relationship between the structure of tissues or organs and one of these processes.
Answer:
I am assuming the question is asking how do the processes relate to one another.
Explanation:
Ventilation happens in the lungs, where carbon dioxide and oxygen are exchanged in the alveoli. This is done via cappilaries that surround the alveoli. Cappilaries are small blood vessels, which are collecitelvy part of the blood flow system (circulation) of the body. In reguards to the digestion, there are capillaries in the vili (which are tiny finger-like structures) so that they can pick up the nutrients during digestion. Another way blood flow and digestion are connected is because the stomach is a muscle, thus is moves and requires energy. That energy comes from the oxygen and nutrients that is supplied by the blood. These are just some examples.
The destruction of an organism's habitat either through human impact or natural causes, such as a fire or flood, increases the likelihood that an organism could become extinct. Which of the following could also increase an organism's chances of extinction? A. an increase in predation, competition, and/or disease B. a lack of genetic diversity in an organism's species C. the inability to reproduce D. all of these
Answer:
D
Explanation:
all of those are likely to increase an organisms chances of extinction
Mention the types of bees
Answer:
ok thus very good percent few Mohammad khan
john is testing the effect of temperature on the solubility of sugar in water
Answer:
As John is testing the effect of temperature on the solubility of sugar in water. To test this, he will measure the amount of sugar dissolved at different temperature level.
Which of the following are all examples of pollution
Pesticide Run-off
Desertification
Global Warming
Poaching
Burning of Fossil Fuels
A possible answer to a scientific question that can be tested is a
Help!!!
I'll give brainliest the brainliest.
Answer:
resists the turgor pressure of the cell: A : cell wall
controls the activities of the cell : C : nucleus
site of the chemical reactions of the cell including synthesis of proteins: D : cytoplasm
Answer:
1. A - Cell Wall
2. C - Nucleus
3. B. Mitochondria
Give brainliest
Please I need help with this
Why is it necessary to separate oxgynated blood and deoxgynated blood in living organisums?
Answer:
For efficient transportation of blood.
Explanation:
why is it necessary yo separate oxgynated and deoxgynated blood in livng oranisum
Explanation:
it is necessary in mammals and birds to separate oxygenated and deoxygenated blood because this makes their circulatory system more efficient and helps in maintaining a constant body temperature
What factor about cellular respiration are you testing? ( what makes the three bottles different?)
Answer:
Gas.
Explanation:
Gas which is present makes the three bottles different from one another. There are three factors which is used for testing of cellular respiration such as amount of oxygen consumed during this process, amount of glucose used and amount of carbondioxide produced during cellular respiration. During cellular respiration, oxygen used in order to break down glucose and releases high amount of energy with the waste materials such as carbondioxide gas.
A molecule will become an ion when which of the following happens?
how many different versions of a gene are carried in a single normal cell?
Answer:
two versions of a gene are carried in a single normal cell called alleles
Which of the following statements is true?
Photosynthesis is a type of homeostasis.
Unicellular organisms have differentiated cells.
Respiration is a type of metabolism.
Multicellular organisms are made of only one cell.
Answer:
Respiration is a type of metabolism.
Answer:
C. Respiration is a type of metabolism
Explanation:
Both B and D are incorrect because:
Multicelluar organisms have more than one cell; while singlecelled organisims only have one cell.
Also, homeostasis is a natural way an organisms body reacts to different situations, like when you sweat, your body is realising a way to lower the heat in your body. Therfore, A. is also incorrect.
Hope this helped!
what is a warning safety sign
Answer:
Hey there!
A warning safety sign is a sign that warns you that there may be a safety hazard around you.
Let me know if this helps :)
1. Viruses such as avian (bird) flu and swine flu that mutate and can spread from animals to human populations are known as what?
O A. Vectors
O B. Transmuting viruses
O C. Epidemics
O D. Zoonoses
Answer:
B
Explanation:
they are transmuting viruses
1. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. A phylogenetic tree containing two main branches for evolutionary relationships among the animals.
B. The first branch leads to Drosophila.
C. The second branch divides into two branches, 2a and 2b. Branch 2a leads to Lancelet.
D. Branch 2b divides into two branches: 3a and 3b. Branch 3a leads to Zebrafish.
E. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Frog.
F. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Chicken.
G. Branch 5b divides into two branches leading to Human and Mouse, respectively.
2. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
B. The nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
C. A frog is the ancestor of both a mouse and a chicken.
The figure shows a tree diagram with two main branches. The first branch leads to Drosophila. The second branch divides into two branches 3a and 3b. Branch 3a leads to Lancelet. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Zebrafish. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Frog. Branch 5b divides into two branches: 6a and 6b. Branch 6a leads to Chicken. Branch 6b divides into two branches leading to Human and Mouse, respectively.
This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
The nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
A frog is the ancestor of both a mouse and a chicken.
The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
Answer:
The answer is below
Explanation:
Given the information above, and from the available pictures which showed the detailed analysis of the information presented in the question. It can be concluded that, the nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
Hence, the right answer is option B.