The fluid mosaic model states that a membrane is composed of lipids that form a fluid 'base', with proteins floating in it that are responsible for the functionality of the membrane. Carbohydrates attached to these proteins or lipids serve to identify the cell.
Explanation:According to the fluid mosaic model, a membrane is composed mainly of phospholipids, proteins, and carbohydrates. In this model, the membrane behaves more like a fluid than a solid. The lipids provide the basic structure of the membrane and form a 'sea' in which proteins can float. These proteins are responsible for most of the functionality of the membrane.
The proteins can be either peripheral (on the surface of the membrane) or integral (embedded within the membrane). Carbohydrates, usually attached to proteins or lipids on the outside layer of the membrane, serve to identify the cell to other cells.
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According to the fluid mosaic model, a membrane is composed of a phospholipid bilayer with proteins and other molecules embedded in it.
The phospholipid bilayer is a thin, double layer of phospholipid molecules. Phospholipid molecules have a hydrophilic (water-loving) head and a hydrophobic (water-hating) tail. The hydrophilic heads of the phospholipid molecules face the outside of the cell and the extracellular fluid, while the hydrophobic tails face the inside of the cell and the cytosol.
Proteins are embedded in the phospholipid bilayer. Some proteins span the entire bilayer, while others are only partially embedded. Proteins play a variety of roles in membranes, including transport, signaling, and cell adhesion.
Other molecules, such as cholesterol and carbohydrates, are also embedded in the phospholipid bilayer. Cholesterol helps to stabilize the bilayer and prevent it from becoming too fluid. Carbohydrates are often attached to proteins and glycolipids on the outside of the cell membrane. Carbohydrates play a role in cell-cell communication and adhesion.
The fluid mosaic model is a dynamic model of the cell membrane. The phospholipid bilayer is fluid, meaning that the phospholipid molecules can move laterally within the bilayer. This fluidity allows the membrane to bend and fold, which is important for cell movement and division.
The fluid mosaic model is a widely accepted model of the cell membrane. It provides a good explanation of the structure and function of the cell membrane.
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The complete question is:
According to the fluid mosaic model, a membrane is composed of a ______ with______ and other molecules embedded in it.
Give three reasons why the polar ice caps do not support any vegetation
Thyroid hormones exert their effects on cells in a manner similar to steroid hormones; describe the mechanism of action of thyroid hormones.
they excerpt as well and produce.
Which type of cell division results in a daughter cell with 1/2 of the genetic information as the parent cell?
Select the proper cell parts listed below to fill in the blanks of the sentences that follow: 1. the is the semi-liquid portion of the cell in which the cell parts are located. 2. the is referred to as the headquarters of cell operation. 3. the structure found in a plant cell, but not in an animal cell, that carries out process of photosynthesis is the . 4. proteins are manufactured by the . 5. the structure that surrounds the cell and regulates what enters and leaves the cell is the . 6. nicknamed the "powerhouse of the cell", the are involved in energy production for the cell. 7. the surrounds the nucleus and controls what enters and leaves it. 8. in addition to a cell membrane, plant cells also have a that serves to provide strength and support to the cell. 9. are structures that contain digestive enzymes. 10. storage chambers within the cell are called . 11. found mostly in animal cells, the plays a role in cell division. 12. the cell structure that prepares and packages proteins either for use within the cell or for shipment out of the cell is the . 13. located within the nucleus, the is involved in making ribosomes for the cell. 14. among other tasks, the serves as a transportation system within the cell. 15. another name for the dna material located within the nucleus of the cell is .
What makes a heterogeneous mixture different from a homogeneous mixture?
The components are mixed unevenly instead of evenly within the heterogenous mixture.
Insoluble instead of soluble particles are suspended within the heterogenous mixture.
Two liquids that normally are not mixable are mixed in a heterogeneous mixture.
The components within a heterogeneous mixture are elements instead of compounds.
The correct answer is that the components are mixed unevenly instead of evenly within the heterogeneous mixture.
A heterogeneous mixture basically refers to any kind of mixture, which is not uniform in composition. It is an uneven mixture of smaller component parts. In the heterogeneous mixture, with the help of certain procedures, the mixture can be separated from each other.
On the other hand, a homogeneous mixture refers to a liquid, solid, or gaseous mixture, which exhibits the similar ratios of its constituents all through a given sample.
What sort of environment (hypotonic, hypertonic, isotonic) did the extra fertilizer create around the roots of the corn?
The extra fertilizer creates a hypertonic environment around the roots of the corn, causing water to leave the cells leading to wilting. Ideally, plants prefer an isotonic environment where the solute concentration is the same inside and outside the cell, allowing the plant to maintain its rigidity.
Explanation:The extra fertilizer creates a hypertonic environment around the corn roots. The fertilizer, which is a solute, raises the solute concentration of the soil solution compared to the inside of the plant cell. When a plant cell is in a hypertonic environment, there is more solute outside the cell than inside. As a result, water moves out of the cell and towards the higher solute concentration. This loss of water from the cell leads to plasmolysis: the plasma membrane peels away from the cell wall and the plant droops or wilts. However, the cell wall prevents the cell from completely shrinking.
For plants, an isotonic environment—where the solute concentration inside and outside the cell is the same—is ideal. In this case, water enters and exits the cell at the same rate, and the plant maintains turgor pressure which helps keep the plant upright.
In summary, the hypertonic environment created by extra fertilizer can cause water loss in plant cells, resulting in wilting, whereas an isotonic environment is more conducive to plant health.
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A pregnant woman recently diagnosed with the genital herpes virus asks the nurse for more information on the virus. which responses by the nurse would be appropriate? select all that apply.
data displayed in rows and columns is called a table ? true or false.
Describe the process of speciation in relation to change in gene frequency, change in environment, natural selection, and genetic drift.
Final answer:
Speciation is the formation of new species due to evolutionary processes like mutation, natural selection, genetic drift, and environmental changes. Allopatric speciation occurs when a species is geographically separated, leading to evolution of distinct traits. Over time, these processes can lead to reproductive isolation and the emergence of new species.
Explanation:
Speciation and Evolutionary Mechanisms
The process of speciation involves the formation of new and distinct species in the course of evolution. This can occur through various mechanisms including change in gene frequency, change in environment, natural selection, and genetic drift. The change in gene frequency, also known as allele frequency, can occur due to mutation, which introduces new alleles into a population. Natural selection acts upon these mutations by favoring alleles that provide a reproductive advantage, thus increasing their frequency in the population.
Environmental changes can lead to new selection pressures, which in turn can lead to allopatric speciation, where a species becomes geographically separated and evolves distinctive traits. Another way speciation can occur is through genetic drift, a random process where some individuals just by chance leave more offspring, and their genes become more common in the population.
Over time, populations may accumulate enough genetic differences to become distinct species, especially if these differences lead to reproductive isolation. Genetic variation, along with evolutionary processes like selection and gene flow, plays a crucial role in how species evolve over time in response to genetic characteristics and environmental conditions.
Termites are unable to digest some plant materials (fiber). Termite stomachs contain bacteria that digest the fiber in wood. Which type of relationship does this describe? commensalism mutualism parasitism competition
Answer: Mutualism
Mutualism is a symbiotic relationship in which two or more than two living organisms live together and benefits each other in the best possible way.
In this scenario, termites provide shelter to the bacteria in their gut and in response bacteria produces enzymes in the gut that breakdown the food and helps in digestion.
Each segment of lung tissue is divided into a number of ____ wrapped in elastic connective tissue with a lymphatic, an arteriole, a venule, and bronchioles from a terminal bronchiole.
Lobules
Explanation;In respiratory system the lungs are two spongy, cone shaped organs in the thoracic cavity and are separated from each other by the heart and other structures found in the mediastinum.Deep grooves called fissures divide each lung into lobes. Each lobe receives its own secondary bronchus. Each lung lobe is divided into smaller segments that are supplied by a tertiary bronchus.The segments, in turn are subdivided into small compartments called lobules, which contains, lymphatic vessel, arteriole, venules and also a branch from terminal bronchiole wrapped in elastic connective tissue.Each segment of lung tissue is divided into a number of bronchioles wrapped in elastic connective tissue.
Further Explanation:
The lower respiratory tract consists of lungs and tubes that control the air entering into the lungs. The tube that terminates into alveoli includes trachea, bronchi, bronchioles, and alveolar ducts. Lungs are present above the diaphragm and surrounded by the rib cage. They are a very crucial component of the respiratory system. The size of the lung is different; the left lung is less wide than the right one. Lung tissues are sub-divided into various numbers of bronchioles. The inner lining of bronchioles contains cilia and goblet cells that secrete mucus. The cilia help in the up and down movement of the mucus in the conducting airways. These cells are termed as mucociliary escalator and are responsible for preventing the entry of foreign particles and microorganisms into the lungs.
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Learn more about the fibrous skeleton of the heart https://brainly.com/question/7301375 Learn more about blood cells bring oxygen and take carbon dioxide away https://brainly.com/question/1213217 Learn more about the system prepares food for absorption into the bloodstream https://brainly.com/question/310282
Answer Details:
Grade: High School
Subject: Health
Chapter: The respiratory system
Keywords:
Lower respiratory tract, remove, particle, responsible, mucociliary escalator, secrete, mucus, bronchioles, lung, tissue.
Which is the following correctly matches a compound with its molecular geometry
The one that correctly matches a compound with its molecular geometry is Methane (CH4): tetrahedral.
Molecular geometry is commonly described as a three-dimensional placing of the atoms that makes up a molecule.It comprises of the general shape of the molecule, with bond lengths, bond angles, torsional angles and any other geometrical parameters that is used to find out the position of each atom.
Molecular shapes are essential in finding out macroscopic properties example melting and boiling points etc.
These geometries are often near, trigonal, tetrahedral, trigonal bipyramidal, and octahedral and they can be determined by the VSEPR theory.
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The full question is below
Which of the following correctly matches a compound with its molecular geometry? VSEPR THEORY
Water (H2O) : linear
Carbon dioxide (CO2): tetrahedral
Ammonia (NH3): trigonal planar
Methane (CH4): tetrahedral
The movement of water molecules through a semi-permeable membrane is called
A client has black, sticky, tarry, foul-smelling stools from digested dark blood. which term should the nurse use in report to describe this finding?
The term the nurse should use to report and describe the findings in the patient is known as “Melena”. Melena is known to be the dark sticky feces containing a part of digested blood. Melena can be produced by swallowing blood or it may indicate that a person is bleeding internally.
What would happen if the sun stopped producing energy?
The 2 major components of the cell membrane are ______ and _______
The two major components of the cell membrane are proteins and phospholipids.
What is a cell membrane?The cell membrane is a biological membrane that distinguishes the interior of all cells from their surroundings and safeguards the cell.
It is mainly composed of proteins and phospholipids that constitute the structure of the cell membrane.
Thus, the major component of the cell membrane are proteins and phospholipids.
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Ant is eating mesquite tree and other insects what type of energy is this ant consuming
The most common treatment for alzheimer's disease is to give drugs that stimulate ____.
Angiosperms _____.
have flowers
have cones
are nonvascular
are seedless
Answer: The correct answer for the blank is -
have flowers.
Angiosperms are also known as flowering plants. These plants bear fruit and possess seeds that are enclosed within ovary (unlike gymnosperms that have naked seeds).
Example of angiosperm- Roses, tomatoes.
Thus, Angiosperms have flowers is the right answer.
Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes ________.
Answer:
Positive feedback mechanism.
Explanation:
Feedback mechanisms are important as they maintains the homeostasis of the organism. Two main types of feedback mechanism are positive feedback mechanism and negative feedback mechanism.
The suckling of newborn increases the milk production in the female body. This is an example of positive feedback mechanism in which the final output increases the original stimulus.
Thus, the answer is positive feedback mechanism.
what are the implications of cloning
Which part of the neuron sends information to other cells?
At what molarity is the sucrose solution isotonic to the cells? (solve for x, when y = 0)
Explain how a longleaf pine tree might be more likely to survive a forest fire than a deciduous tree, such as a maple or oak tree
Final answer:
Longleaf pine trees are more likely to survive a forest fire than deciduous trees due to their fire-adapted traits such as flammable needles, well-developed root systems, and serotinous cones that release seeds in high temperatures, unlike deciduous trees that tend to lack such adaptations.
Explanation:
Longleaf pine trees have several adaptations that increase their likelihood of survival in the event of a forest fire compared to deciduous trees like maple or oak. These adaptations include fire-adapted traits such as flammable needles that promote low intensity fires to clear competitive understory plants without seriously harming mature pines, as well as a well-developed root system that enables them to quickly regrow after a fire. Additionally, some pine species have serotinous cones, which only open and release their seeds when exposed to high temperatures from a fire, thereby capitalizing on the open, sunny conditions post-fire for seedling growth.
In contrast, deciduous trees tend to lack these fire-adaptive characteristics. They often possess thinner bark, which doesn't protect as effectively against the heat of a fire, and they do not typically have a mechanism like serotinous cones for post-fire seed dispersal and regeneration.
Fire ecology plays a crucial role in shaping the dynamics of forest ecosystems. While fires can be destructive, fire-adapted species like longleaf pines demonstrate how some trees have evolved to use these events to their advantage, ensuring their dominance in certain fire-prone habitats.
Human skin becomes dry during winter, making it more prone to infections than during summer. How do the sebaceous glands protect the skin normally?
A. Sebaceous glands produce a substance that moisturizes and protects the skin. B. Sebaceous glands cause the hair to stand erect, which insulates and protects the skin.
C. Sebaceous glands produce keratin, which gives the skin a tough structure and protection.
D. Sebaceous glands contain collagen fibers, which provide strength and protection.
Which mechanism requires energy?
A. Exocytosis
B. Osmosis
C. Diffusion of oxygen into a red blood cell.
D. Diffusion of ions through a potassium channel
Exercise habits and sleep habits are examples of:
What factors influence naturally occurring fluctuations in the levels of dissolved oxygen?
The full extent of my __________ skill is preparing scrambled eggs on toast.
I most biological systems, cells are ________ to their environment.