An expectant mother of twins has been told there is a strong chance that she will go into labour early and her babies will be premature. in order to increase the chances of having healthy infants, she is given a dose of steroids to stimulate the production of surfactant in the infants' lungs. surfactant is important for survival of the babies because it reduces:
Which statement correctly compares the pH of water to that of other substances?
a: The pH of water increases as its temperature increases, while other substances have a stable pH.
b: The pH of water is neutral; it is higher than the pH of acids and lower than pH of bases
c: Water contains more hydrogen ions than most other substances, giving it a higher pH.
d: Water is neutral and has a pH of 0; acids have a pH greater than 0 and bases have a pH less than 0
The right answer is B.
The abbreviation pH refers to the notion of hydrogen potential. The pH has since become an indicator of acid solutions - when the pH is below 7 - or alkaline solution - when the pH is above 7 - of a solution. A neutral medium displays a pH of 7. This is the case of pure water at 25 ° C.
A flood kills most of a population of ants that live near a river. after the flood, the ant population increases, but its allele frequency is different. what type of effect is this?
a.genetic drift
b.mass extinction
c.bottleneck
d.founder
Answer:
The answer is: a. Genetic drifts originate from the error, in this case: c. Bottleneck.
Explanation:
Genetic drift, also known as allelic drift is an evolutionary force that acts together with natural selection by changing the allelic frequencies of species over time.
Bottleneck, is that a population undergoes a drastic reduction in its size, giving rise to a population with a high probability of suffering genetic drift. Any mutation in an individual will be amplified in the community when it grows again. Bottleneck events are also characterized by producing a reduction in the genetic diversity of species, due to the extinction of less frequent alleles.
The answer is: a. Genetic drifts originate from the error, in this case: c. Bottleneck.
The effect in which a flood changes the allele frequency of an ant population by killing most of them is known as the bottleneck effect, which is a form of genetic drift.
Explanation:The event described in the question, where a flood kills most of a population of ants and the remaining population has a different allele frequency, is known as the bottleneck effect. This type of effect is an example of genetic drift, which occurs when a large portion of a population is suddenly wiped out due to a disaster, such as a flood in this case.
The survivors' genetic structure becomes the genetic structure of the entire population, which may be very different from the pre-disaster population. The bottleneck effect reduces or eliminates alleles within a population as a result of the disaster killing individuals at random, for reasons unrelated to their traits.
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A client with chronic obstructive pulmonary disease (copd) has been prescribed an inhaled bronchodilator. which technique should the nurse implement in order to ensure safe and complete delivery of the prescribed medication?
When you eat a candy bar and then decide to go for a walk, energy transformations take place. beginning with the food energy in the candy bar, describe the forms of energy used and the changes in energy that occur as you decide to walk and as you do the walking?
While eating it indicates the potential energy, later walking indicated kinetic energy and at last the step shows heat energy.
What is kinetic energy?Kinetic energy has been defined as the energy of the object that occurs due to the motion of the object. The total work that has to be needed by the body to starts the accelerating it by the help of given mass which has been supplied from the rest position and it has been mentioned velocity.
The energy body gets due to the process of acceleration by this the body will be able to maintain the kinetic energy of the body without changing its speed of the body. The energy which has been stored in the body or any object by the help of the particular position or the proper arrangement of the parts is known as potential energy.
There would be no effect of the outside environment on the potential energy that has been present inside the body. The kinetic energy decrease or increase with change in the velocity.
Therefore, While eating it indicates the potential energy, later walking indicated kinetic energy and at last the step shows heat energy.
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The term ________ refers to the fact than an epithelial tissue has only one layer of cells.
Leucoplasts are types of?
During hemostasis, which process occurs first?
how many of the devices that identified inside the control room need electricity to operate
All of the devices that identified inside the control room need electricity to operate.
Mostly control rooms (also known as operations center, or operations control center (OCC)) are for only authorized persons and general public are not allowed to enter there. Many electronic displays, control panels and other electronic devices are there in the control room.
The only United States floral organization that has a nationally recognized and certified floral-design designation is the
Answer:
American Institute of Floral Designers
Explanation:
The American Institute of Floral Designers is a non-profit organization established in 1965 in the USA. The objective of this institute is to stimulate, promote and help the creation of artistic works in the floral area of talented professionals who wish to be recognized as professionals. This is the only floral organization in the United States that has a nationally recognized and certified floral designation designation.
Organisms that synthesize their own c-c molecules from single-carbon starting materials are named _____, while those that absorb preformed c-c compounds produced by other organisms are _____. organisms that synthesize their own c-c molecules from single-carbon starting materials are named _____, while those that absorb preformed c-c compounds produced by other organisms are _____. phototrophs; chemoorganotrophs chemoorganotrophs; heterotrophs autotrophs; chemoorganotrophs autotrophs; heterotrophs
What is the most common result when heat radiation is released from Earth?
A) The amount of carbon dioxide in the atmosphere increases.
B) The temperature of the atmosphere decreases.
C) Water vapor is produced in the atmosphere.
D) The heat causes an increase in precipitation.
E) Certain gases in the atmosphere absorb the heat.
The condition of “capture” refers to the extreme closeness that can occur between what two entities?
What forms of energy are involved with snow on the mountain breaks loose resulting in an avalanche?
Which of the choices below is an erosional karst feature?
At what point during protein synthesis are genes expressed?
Answer: When the protein for a particular gene is formed, the gene is expressed
Gene expression is the process in which the information from a gene is used for the synthesis of protein. The gene code for protein and the protein regulate the function of the cell in the body.
It involves the process of transcription in which a segment of DNA is xeroxed into mRNA by the help of enzyme RNA polymerase. The next step is the translation in which the messenger RNA is decoded in the ribosome to produce a specific amino acid or the polypeptide chain that perform a specific function in the cell.
Because it's a site of heat production which type of connective tissues found in animals that hibernate during the cold winter months
A. Dense fibrous connective tissue
B. White adipose tissue
C. Reticular fibrous connective tissue
D. Brown adipose tissue
which of these conditions would promote aldosterone release from the adrenal glands
Conditions that promote aldosterone release from the adrenal glands include decreased blood pressure/volume, increased potassium levels, and activation of the renin-angiotensin system. These conditions lead to increased sodium and water retention, thus elevating blood pressure.
Explanation:Several conditions stimulate the release of aldosterone from the adrenal glands. These include situations that trigger a decrease in blood pressure or blood volume, an increase in potassium levels in the blood (hyperkalemia), or the activation of the renin-angiotensin system (RAS), a hormone system that regulates blood pressure and fluid balance. For instance, if blood pressure drops, the kidneys respond by releasing renin, which leads to a series of reactions that ultimately results in the production of aldosterone. The aldosterone then acts on kidneys, causing them to retain sodium and water, which in turn increases blood volume and pressure.
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Is J. Evans male or female? How can you tell?
How many chromosomes does J. Evans have?
Label the parts of a cell membrane with the term that describes each part.
The cell membrane consists of several parts, including the phospholipid bilayer, integral proteins, peripheral proteins, glycoproteins, and cholesterol. These components work together to maintain the structure and function of the cell membrane.
Explanation:The cell membrane is composed of several parts that play important roles in the functioning of a cell. These include:
Phospholipid bilayer: This is the main structural component of the cell membrane. It consists of two layers of phospholipids arranged with their hydrophilic heads facing the external and internal environments and their hydrophobic tails facing each other.Integral proteins: These proteins are embedded within the phospholipid bilayer and can span the entire membrane. They are involved in various functions, such as transporting molecules across the membrane and cell signaling.Peripheral proteins: These proteins are bound to the outer or inner surface of the cell membrane. They play roles in cell signaling and maintaining the cell's shape.Glycoproteins: These are proteins with attached carbohydrate chains. They serve as recognition sites for other cells and molecules.Cholesterol: Cholesterol molecules are interspersed within the phospholipid bilayer and help maintain the fluidity and stability of the cell membrane.Learn more about Cell Membrane here:https://brainly.com/question/33722277
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The cell membrane is composed of a phospholipid bilayer, proteins, and carbohydrates, each with a specific function. These parts work together to regulate the passage of substances, maintain internal conditions, and facilitate cell communication.
Explanation:The cell membrane is composed of several parts, each with a specific function. Here are the main parts of a cell membrane:
Phospholipid bilayer: This is the main component of the cell membrane, consisting of two layers of phospholipids. The hydrophilic heads face outward, while the hydrophobic tails face inward, creating a barrier.Proteins: Embedded within the phospholipid bilayer, proteins have various roles, including transport of molecules, cell signaling, and structural support.Carbohydrates: Attached to some proteins, carbohydrates help cells recognize and communicate with each other.These parts work together to regulate the passage of substances in and out of the cell, maintain internal conditions, and facilitate cell communication.
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The lowermost level of the epidermis is known as the:
How does the structure of a cell suggest its function? list three examples?
Explanation:
The structure of a given cellular component has a lot to do with its function, these relationships are called structure-function relationships.
Examples:
Cell membranes: This structure is responsable for the cell's physical integrity, it also regulates it's interaction with outer molecules and other cells. Cytoplasm: Consists of a watery matrix that supports the interior cell contents. Most chemical reactions occur here with the help of enzymes. The watery nature of this structure make reactions more viable. Ribosomes: Responsible for the manufacture of all proteins the organism needs through a process called transcription where mRNA is made by DNA then taking individual amino acids linking them together to create chains, forming proteins. Their two subunits suggest the ability to construct proteinsI hope you find this information sueful and interesting! Good luck!
Here are three examples:
The cell membrane is a thin layer that surrounds the cell and protects it from the outside environment. The nucleus is the control center of the cell. It contains the DNA, which is the genetic material that determines the cell's structure and function.The mitochondria are the "powerhouses" of the cell. What are these examples about?The cell membrane also helps to control what substances can enter and exit the cell. This is important because cells need to be able to take in nutrients and get rid of waste products.
The nucleus also contains the ribosomes, which are responsible for making proteins. Proteins are essential for all of the cell's functions.
They are responsible for converting food into energy that the cell can use. The mitochondria are also important for cell growth and reproduction.
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A client suffers from low mood and disturbed sleep. this client is most likely experiencing a change in which neurotransmitter?
What are narcotics?
A. drugs that act as sedatives and slow down activity and make a person calm, sleepy, or even unconscious
B. drugs that are derived from opium as well as drugs that have similar chemicals but are man-made
C. drugs that energize behavior and are often used to help a person stay awake, lose weight, or elevate mood
D. drugs that have chemicals that influence perceptions, moods, consciousness, or behavior
An example of programmed cell death (death at maturity) is the differentiation of
The soils best associated with tropical rainforest areas such as the amazon basin and the wet-dry climate area are
What is a vertical section through the body, dividing it into left and right, called? what is a vertical section through the body, dividing it into left and right, called? regional sagittal transverse frontal?
A person has 3 beers in an hour. how long does it normally take to process and eliminate this alcohol from the system?
The _______ is a set of flattened stacks of membrane-bound sacs in an animal cell.
Channels in the membrane of the neuron allow ions to flow between the inside and outside of the cell. of these, ___________ open only when certain electrical conditions are met.