Answer:
a. Tight junctions form a ring of protein around the cell which connects to neighboring cells. This forms a physical barrier restricting lateral diffusion within the membrane.
Explanation:
Epithelial cells in the small intestine act absorbing nutrients from the digestive tract. The cell membranes in these cells are divided into two domains: the apical domain specialized in nutrient absorption, and the basolateral domain, which transfers the absorbed nutrients to the blood vessels.
In order to maintain these functions differentiated, the mobility of proteins must be restricted to the pertinent domains. One of the mechanisms to achieve this is the formation of tight junctions between the adjacent cells of the epithelium. This acts as a barrier to the movement of lipids and membrane proteins. As a result, proteins can diffuse within their domains but can not cross from one domain to the other.
These tight junctions are formed by interactions between strands of transmembrane proteins, and generally, associate with adherent unions and desmosomes forming an union complex.
What are some(4) similarities between dark field microscopes and bright field microscopes?
Answer:
Explanation:
Bright field microscopy is the conventional technique. It is suitable for observing the natural colors of a specimen or the observation of stained samples. The specimen appears darker on a bright background. Darkfield microscopy shows the specimens bright on a dark background
What amazing thing can plants do with carbon dioxide and water molecules? How?
Answer:
In the process of photosynthesis the plants make their own food by using carbon dioxide, water, sunlight and soil.
The energy from sun light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen.
Explanation:
Hope this helps you
Crown me as brainliest:)
The _____ temperature and the _____ pressure on Earth's inner core force it to remain a solid. (4 points)
Answer: high and low
Explanation: high and low
Answer:
Low and high
Explanation:
List the characteristics of plants
Answer:
Plants are multicellular eukaryotes. They have organelles called chloroplasts and cell walls made of cellulose.
Plants also have specialized reproductive organs.
Almost all plants make food by photosynthesis.
Life as we know it would not be possible without plants.
How might pandemic flu impact the functioning of society?
Schools may need to be closed
Vaccine manufacturers may shut down.
Workers may need to use their sick leave time.
Healthcare facilities may become overwhelmed.
Answer:
D. ?
Explanation:
Kinda whats going on rn lol
Hope this helps!
-BB
Answer:
Health facilities may become overwhelmed. If this is multiple choice picking I would also choose "Schools may need to be closed" and "Workers may need to use their sick leave time."
Explanation:
It's a bit self explanatory, no?
What is the range of the absolute value function shown in the graph?
A.
3 ≤ y < ∞
B.
-∞ < y ≤ 3
C.
-6 ≤ y < ∞
D.
-∞ < y < ∞
Answer:
b
Explanation:
Answer:
C
Explanation:
-6 ≤ y < ∞
Why is it important for the daughter cells to divide a second time In meiosis?
Answer:
The second time the daughters cells divided haploid cells form and then migrate to other haploid cells in the process of fertilization.
Explanation:
Daughter cells divide a second time In meiosis because it creates cells that are destined to become gametes.
What is Meiosis?This is the type of cell division common in reproduction and gamete production and produces four unique daughter cells.
The daughter cells divide twice because it creates cells that are destined to become gametes as its union during fertilization would result in offspring with twice the normal number of chromosomes.
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In your own words, What is osmosis?
Answer:
Osmosis is the movement of water molecules through a semi-permeable layer from high concentration to low concentration until equilibrium.
Explanation:
the release of.one phosphate group from ATP powers the reactions in the cell. Which phosphate is the one released from ATP
Answer:
Hey sorry, Considering this was ages ago did you finish this? what was the answer? Its too late to comment but can you rate the answer (like if it's the first option [which is #2] rate it 2 stars or if its C rate this 1 star, so on and so forth)
Explanation:
Sorry
A phosphate that is released from ATP is the third one. Thus, the correct option for this question is D.
What is ATP?ATP stands for Adenosine triphosphate. It may be defined as a type of high-energy compound that significantly delivers energy to the cells for the accomplishment of metabolic activities. Therefore, it is known as the energy currency of the cell.
The removal or elimination of the phosphate group from ATP to yield ADP significantly liberates energy. This released energy is captured or consumed by the cells of living organisms in order to derive energy for the completion of metabolic activities. While the adjoining of these phosphate groups significantly required energy.
Therefore, the third phosphate is the one that is released from ATP. Thus, the correct option for this question is D.
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Identify the way in which photosynthesis and cellular respiration are different
Answer:Photosynthesis makes the glucose that is used in cellular respiration to make ATP. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.
Explanation:
How does the digestive system interact with the circulatory system?
A. Messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system.
B. Nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system.
C. Oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.
D. Nutrients and gases are absorbed by organs in the circulatory system. Then, they are transported to all parts of the body by organs in the digestive system.
Answer:
D
Explanation:
the circulatory absorbs nutrients and carries the chemical to signal through endocrine to control the speed of digestion.
(PLZ help me ill give brainiest)
Which of the following explains why anatomy and physiology are closely related?
A. Biological systems are organized in a hierarchical manner.
B. These disciplines have implications in diverse medical and scientific fields.
C. Humans are complex living beings, with multiple organ systems required for human life.
D. Structure and function are interdependent.
A mutation has occurred that results in a drastic reduction in mRNA transcription from very high levels to low levels. What region is likely responsible?
Answer:
Enhancer region
Explanation:
An enhancer is a cis-regulatory DNA region that binds to transcription factors in order to stimulate transcription. Enhancer regions are localized both upstream and downstream of the gene whose transcription regulates, at a variable distance ranging from 1 to 100 kilobases (kb) from the transcription start site. The first enhancer to be identified was found in an intron of the immunoglobulin gene. Conversely, a silencer element is a DNA region that binds to proteins known as repressors in order to suppress transcription.
_________________________________________ are large bodies of air with similar characteristics such as temperature and humidity.
Answer:
Air masses.
They can be cold or warm.
What is the name of the tube that our hair grows from?
Helpppp meeeeeee plssss
Answer:
ok
Explanation:
ok thats the answer
How many amino acids are coded for the following segment GGCCTGGCA?
A complete living thing, for example
a rabbit or an oak tree, is
A. a biome.
B. an organelle.
C. an organism.
D. a population.
Lihts Reserve
Answer:
C
Explanation:
a single living thing is an organism
HELP ME. don't know what this means
Answer:
1. Leaf
2. Chloroplasts
3. Thylakoids
4. Chlorophyll
Explanation:
Hope that helps!
A geochronological scale measured in Millions of Years Ago or M Y A. Mesozoic era: Triassic period, 250 to 201 MYA, first dinosaurs, first mammals, conifers, ocean-living reptiles. Jurassic period, 201 to 145 MYA, dinosaurs, first birds, ocean-living reptiles. Cretaceous period, 145 to 65 MYA, dinosaurs, first flowering plants.
Which describes the geological time of the first land plants.
Conifers appeared after the first flowering plants.
Conifers first appeared around 182 million years ago.
The first flowering plants appeared around 240 million years ago.
The first flowering plants were introduced toward the end of the Mesozoic era.
Answer:
D. The first flowering plants were introduced toward the end of the Mesozoic era.
Explanation:
Following the Paleozoic Era, the Mesozoic Era or Age of Conifers began approximately 250 million years ago. This major geological era brought about the ancestors of many of the plant and animal groups still in existence today.
The Mesozoic era is marked by 3 divisions:
the Triassic Period, the Jurassic Period, and the Cretaceous Period.Animals and plants slowly recovered after the mass extinction in the Permian-Triassic extinction that led to the eradication of most aquatic marine species. They evolved to exploit varying niches in their environment, leading to a boom in terrestrial animals. Over time the planet's increasingly warm climate, abundant in atmospheric oxygen and carbon dioxide, contributed to the growth of diverse megaflora, that rapidly dominated the planet's terrestrial biosphere.
By the end of the Mesozoic Era, in the Cretaceous period, flowering plants (angiosperms) largely replaced the dominant seed ferns of the Triassic, and the conifers, cycads and gymnosperms of the Jurassic.
Varied dispersal mechanisms in angiosperms co-evolved with the evolution of certain types of fauna. Plants used animal life, including herbivorous reptiles and early mammal-like species to disperse large seeds.
Answer:
D
Explanation:
The first flowering plants were introduced toward the end of the Mesozoic era. Also Did The Test
please help i give 48 points !!!which correctly lists the three layers in which water moves easily
A: ROCK, CLAY ,GRANITE
B: SOIL,ROCK,ORGANIC LAYER
C: CLAY,ORGANIC LAYER, GRANITE
D: GRANITE, ROCK, SOIL
soil, rock, organic layer
Explanation:
Permeability is the ability of a layer of rock to transmit fluid such as oil or water
The factors that affect the permeability of a rock layer includes the sizes of the rock particles, the ratio of the available voids to the solid mass of the rock, the presence of trapped air and the presence of organic matter
Rocks such as gravels, and sparingly cemented sands have high permeability
The most impermeable of the options are granite and clay which for granite has large particle mass and contain no voids while clay has very fine particles packed together with little room for water
Therefore, water moves easily between layers soil, rock, organic layer
Answer:
SOIL, ROCK, ORGANIC LAYER
Explanation:
Edge 2020, hope this helps :)
PLEASE HELPPP!!!!
Choose the best explanation of a partial solar eclipse?
A. The earth only partially covers the sun during the eclipse
B. The moons phase is full and blocks out most but not all of the sun
C. During a new moon phase there is usually a partial but not total eclipse
D. The moon only partially covers the sun during the eclipse
Answer:
The best explanation for a partial solar eclipse is that moon only partially covers the sun during the eclipse (option D).
Explanation:
A solar eclipse occurs when the moon stands between the sun and the earth, which happens when the moon is near the plane of the ecliptic, that is, the point where the orbits of the earth and the sun intersect.
A partial solar eclipse occurs when the moon partially covers the sun, which depends on the observer's point of view on the earth and his geographical location.
The other options are not correct because:
A. If the earth stands between the sun and the moon, lunar eclipses occur.
B and C. During a solar eclipse it is not possible to see lunar phases, which occur when the sun's rays are reflected off the satellite.
Answer:
for a little easier answer from the other one on this question basically the answer is D.
Explanation:
What does dilation, and therefore increased permeability, of the capillaries during the inflammatory response allow to happen
Answer:
During the inflammatory reaction and cytokine / cell diffusion, a chemical compound called nitric oxide, known as NO, is released. This chemical compound increases the permeability of the vessels, that is, the separation between the endothelial cells of the vessels to promote diffusion, inflammation and diapedesis.
Explanation:
Another factor that promotes permeability of the vessels are pro-inflammatory cytokines and chemicals released by antigen-presenting cells.
plssss help i’m timed
starch and water molecules in potato cells are stored in what organelle?
Potatoes synthesize and store starches in organelles is called amyloplasts.
What is amyloplast?Amyloplast is a type of plastid that formed as well as store starch. They are commonly found tubers (potatoes) and bulbs. Amyloplasts are also helping plant roots grow in a downward direction.
So we can conclude that Potatoes synthesize and store starches in organelles is called amyloplasts.
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A protein was not folded correctly after translation and needs to be degraded. Which organelle will this protein be transported to?
A. Mitochondria
B. Nucleus
C. Lysosome
D. Golgi apparatus
E. Rough ER
Answer:
The correct answer is - lysosome
Explanation:
Protein that are not correctly folded and needed to be degraded require help of lysosome an organelle that helps in degrading macromolecules.
It is also helps in digestion and regulate cellular functions by removing protein and molecules that are not required anymore and prevents from unwanted accumulation.
PLEAS HELP!!! Clara had to choose between making an animal or a plant cell. Which type of cell does her model represent?
a. plant
b.animal
Describe the function of two structures identified in Clara's cell, other than the mitochondria.____
Identify two cell structures that are missing from Clara’s model. ____
Describe the function of each cell structure you identified in the question above. ___
B. Animal cell, I believe so because of the shape of the cell and it does not clarify if it has a cell wall, if it has a cell wall and mehran then it's a plant cell if it only has a cell membrane in them it's an animal cell
Clara's model represents an animal's cell. The Golgi body and ribosome are missing. Hence, option B is correct.
What are the functions of different cell organelles?The gel-like substance that fills a cell is called cytoplasm. It serves as a catalyst for chemical reactions. It offers a foundation for other organelles to function within the cell. A cell's cytoplasm is where all of the processes for cell division, growth, and replication take place.
The nucleus' principal jobs include storing the cell's DNA, preserving its integrity, and assisting with transcription and replication. The main function of the nucleolus is to facilitate and assemble ribosomes. The plasma membrane is the outer covering of the cell, which provides it protection and allow the transportation of nutrients and other essential material into the cell.
In Clara's model cell wall is absent. Hence, option B is correct.
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Hypertonic means...
A. High in solute
B. Low in solute
C. Equal in solute
D. Hyperactive
Answer:
D Hyperactive
Explanation:
Answer:
A.High in solute
Explanation:
Ok,In the reasoning of the word hyper,this brings up a conclusion that it means something high as in raised level thus the term being made to be hypertonic then it refers to the whole term meaning it is a solute of higher or high solute concentration.
A base is best defined as a substance that:
O A. both captures and releases hydrogen (H+) ions in a s
B. removes hydrogen (H) ions from a solution.
C. adds hydrogen (H-) ions to a solution.
O D. stays in a solution whenever it contains hydrogen (H-)
Answer:
B
Explanation:
a base is a negatively charged anion capable of reacting with anion species such as H ions
What is a list of combination biomolecules?
Answer:
Biomolecules include large macromolecules (or polyanions) such as proteins, carbohydrates, lipids, and nucleic acids, as well as small molecules such as primary metabolites, secondary metabolites and natural products. A more general name for this class of material is biological materials.
Explanation:
