Myasthenia Gravis is a disease characterized by the production of antibodies against nicotinic acetylcholine receptors resulting in a decrease of functioning receptors at Motor end plates. Physiologically, what might you expect to happen as a result?
a. clonus
b. increased frequency of motor neuron firing
c. chorea
d. paralysis of skeletal muscle
Answer:
The correct answer is - option d.
Explanation:
Myasthenia gravis is an autoimmune condition in which nerve endings are targeted due to the body produces antibodies against receptors of nicotinic acetylcholine which results in less or no functioning of nerve endings of motor neurons mostly.
Options A, B, and C all three conditions are all due to an increase in muscle movement which is not the case as it causes weakness in the muscles due to less functioning in motor end plates.
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Answer:
I can't see the media clearly:'(
Active cells such as muscle cells likely contain
Muscle cells contain actin and myosin protein filaments that slide across each other to create a contraction that modifies both the cell's length and shape. Muscles act for strength and movement
10 POINTS !!! Why is it risky to build something whose natural frequency can be matched by
external vibrations?
Answer:Most objects have at least one natural frequency of vibration. If a nearby object vibrates at the same frequency, it can cause resonance. Resonance is an increase in amplitude of a vibration that occurs when external vibrations match an object's natural frequency.
Explanation:
It is risky to build something whose natural frequency is matched with external vibrations because of ; The effect of resonance
When an object constructed has a natural frequency which is equal to the frequency of a nearby external vibration, the amplitude of the vibration of the object will increase due to the resonance effect which occurs because the external frequency matches up with the natural frequency of the constructed object.
The negative effect of resonance is the increase in the amplitude of the vibration of the object which might lead to the partial or complete collapse of the constructed object.
Hence we can conclude that It is risky to build something whose natural frequency is matched with external vibrations because of ; The effect of resonance
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1) What are estuaries? 2) How/why do shallow estuary waters create unique habitats for organisms living here? 3) How does the salinity in water change as you move from inland areas out towards the ocean? Be sure to include the phrase "brackish waters" in your response . 4) List 4 ways estuaries provide protection for inland areas. 5) How does dredging impact fish living in an estuary? 6) How could too many nutrients impact the natural balance in an estuary? 7) List and describe 3 ways the land terrain change as we move from Charlotte, NC to the coastal plains of North Carolina ) List 4 ways estuaries provide protection for inland areas. 9) List 5 factors that can change the flow of water through an ecosystem 10)List and describe 4 reasons estuaries are important for both wildlife and human activity
Answer:
Estuaries is a water body where freshwater from rivers and streams combines with salt water that is coming from the ocean.
Explanation:
Estuaries is a type of water body that is partially enclosed present at the coastal side where freshwater from rivers and streams combines with salt water that is coming from the ocean. Shallow estuary waters create unique habitats for organisms living there because the presence of brackish water refers to the mixture of fresh water draining from the land and salty seawater. The salinity in water change as you move from inland areas out towards the ocean because the water of inland has less salt in it while water of ocean has huge amount of salt present in it so when we move from inland to the ocean salt concentration increases in it. estuaries provide protection for inland areas by filtering pollutants, prevent shoreline erosion, flooding and storm.
These pellets are not eliminated as _________________, but are regurgitated through the ___________________.
Answer:
These pellets are not eliminated as feces, but are regurgitated through the mouth. Pellets are not found exclusively within the owl families. There are many species of birds known to regurgitate pellets: hawks, eagles, kites, harriers, falcons, and even robins are some of the more familiar ones.
tell me if im wrong :/
which graph best shows the motion of a car stopped at a pedestrian crossing?
Two parents decide to have a child. The parents plan to have their genes tested before they have their child to see if there is a possibility of their child having sickle cell, a recessive blood disorder. The parents find out they are both heterozygous. What percentage does their child have to get sickle cell?
Answer:
1/4 chance.
Explanation:
I used a punnet square to calculate the possibility and it seems to be a one in four chance.
Answer:
The answer to that question is 25%
Explanation:
Reason is because 1/4 = 25%
A partial DNA sequence for normal hemoglobin and a partial DNA sequence for sickle-cell anemia are shown below. G-G-A-C-T-T-C-T-T Normal hemoglobin G-G-A-C-A-T-C-T-T Sickle-cell anemia Based on the DNA sequences, sickle-cell anemia is caused by A. a sex-linked trait. B. a dominant nucleotide. C. a mutation in the genetic code. D. an incomplete separation of chromosomes.
Answer:
C. a mutation in the genetic code.
Explanation:
A mutation refers to any change or alteration to the nucleotide sequence of a gene caused by mutagen or mistakes during replication. Depending on the manner of occurrence, mutation can be of different types. In this question, partial DNA sequence for normal hemoglobin is given as: G-G-A-C-T-T-C-T-T while the partial DNA sequence for sickle cell anaemia is given as: G-G-A-C-A-T-C-T-T.
From careful observation of the two two DNA sequences above, it can be realized that a SUBSTITUTION MUTATION from T to A has occurred in the sequence of sickle cell. Note that substitution mutation is the replacement of one base by another in a sequence.
PLZ HELP WILL GIVE BRAINLIEST
Which of the following best describes how the types of cell reproduction relate to major groups of organisms?
Group of answer choices
Meiosis only occurs in organisms that reproduce sexually.
Meiosis only occurs in plants and fungi.
Mitosis occurs only in animals with backbones.
Mitosis occurs only in organisms that have cell walls.
Which of the following is not part of the cell theory?
A. All organisms are composed of one or more cells.
B. Cells are the basic unit of life for all living things.
C. All cells come from pre-existing cells.
D. All cells contain a nucleus.
Answer:
the answer is D. All cells contain a nucleus
What are the building blocks of proteins ?
A. Nucleotides
B. Monosaccharides
C. Fatty Acids
D. Amino acids
Distinguish the types of forgetting: anterograde amnesia, retrograde amnesia, encoding failure, retrieval failure, and interference (both retroactive and proactive).
Answer:
Anterograde amnesia is the inability to create new memories after the onset of amnesia, while memories from before the event remain intact. Brain regions related to this condition include the medial temporal lobe, medial diencephalon, and hippocampus. Anterograde amnesia can be caused by the effects of long-term alcoholism, severe malnutrition, stroke, head trauma, surgery, Wernicke-Korsakoff syndrome, cerebrovascular events, anoxia, or other trauma. Retrograde amnesia is the inability to recall memories made before the onset of amnesia. Retrograde amnesia is usually caused by head trauma or brain damage to parts of the brain other than the hippocampus (which is involved with the encoding process of new memories). Brain damage causing retrograde amnesia can be as varied as a cerebrovascular accident, stroke, tumor, hypoxia, encephalitis, or chronic alcoholism. The there is encoding failure. Encoding is the process of converting sensory input into a form able to be processed and stored in the memory. However, this process can be impacted by a number of factors, and how well information is encoded affects how well it is able to be recalled later. On the other hand, retrieval failure is the failure to recall information in the absence of memory cues. Proactive interference occurs when old memories hinder the ability to make new memories. In this type of interference, old information inhibits the ability to remember new information, such as when outdated scientific facts interfere with the ability to remember updated facts. This often occurs when memories are learned in similar contexts, or regarding similar things. It’s when we have preconceived notions about situations and events, and apply them to current situations and events.Retroactive interference occurs when old memories are changed by new ones, sometimes so much that the original memory is forgotten. This is when newly learned information interferes with and impedes the recall of previously learned information. The ability to recall previously learned information is greatly reduced if that information is not utilized, and there is substantial new information being presented. This often occurs when hearing recent news figures, then trying to remember earlier facts and figures.
Explanation:
Found it on a similar question
In a food web, where should all organisms have the arrows pointing to? Multiple choice question: (Consumers, producers, decomposers)
Answer:
producers
Explanation:
producers are usually plants and veggies/ fruits. These producers don't get their energy from other organisims. They get it from sunlight and water etc. They are the end stage of the food chain.
what is the difference between cell structure and cell function?
Answer:
These cells have a membrane-bound nucleus that houses their DNA and contain extensive internal organelles (“little organs”) that perform specific functions. ... Differences occur in size, shape, and presence and number of various organelles and other structures. Each cell's structure correlates with its specific function.
Explanation:
Answer:
A cell can be defined as the smallest unit of life and an example include muscle cells. An aggregation of cells form tissues.
The major difference between a cell structure and cell function is in their functions and physical properties.
Cell structure: This talks about how the cells look like when viewed. A call contains components such as the nucleus, cytoplasm, cell membrane etc and each has their various functions to ensure the organisms/animals are able to perform various life activities.Cell function: This on the other hand refers to the various functions which a cell is able to perform and this is dependent on the component in question such as the nucleus which controls cell activities and cytoplasm which provides support and helps to house other organelles.
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Someone help plz like plz
Answer:
expreesiom
Explanation:
exp 90
expe 80
omg ppn
ppn tenzin
ff
fortnite
pubg
A biologist counts the number of zebras in a population each year, and notices an increase in the zebra population. Which describes the biologist’s actions?
Answer:
if I'm correct he is gathering information and is probably making a chart to graph the information about how much the zebra population is growing
Answer:
The correct answer is that he is observing.
Explanation:
Describe skin cells and their function
Help please I'll give brainlist
The environment limits population growth by changing birth and death rates. Briefly describe how each environmental factor listed below influences population size. Also, identify each environmental factor as a biotic or abiotic factor
Competitors
Disease
Food
Ph level
Prediction
Soil type
Temperature
Water availability
Answer:
Disease
Ph level
Water availability
Soil type
Explanation:
what are the causes of antibiotics resistance ?
Answer:
Over-prescription of antibiotics.
Patients not finishing the entire antibiotic course.
Overuse of antibiotics in livestock and fish farming.
Poor infection control in health care settings.
Poor hygiene and sanitation.
Explanation:
Answer: Antibiotic resistance has become a global threat, and with Antibiotic Awareness Week, it is important to understand the series of events that have led the world to this predicament. Originally touted as a miracle discovery, we are seeing that there can be too much of a good thing.
Explanation: The use of antibiotics has saved millions of lives, but its pervasive use to treat any infection, whether serious, minor, or even viral has lead to the increase in antibiotic resistance. Antibiotics strictly target bacteria, but it is sometimes difficult to differentiate between viral and bacterial infections without costly tests. It is often less time-consuming and more cost effective to proactively prescribe antibiotics, rather than take precautions and prescribe only the correct treatment.
Another issue with antibiotics is the inability to monitor patient intake. Antibiotic dosages are designed to eradicate entire populations of the pathogens. When antibiotics are not taken for the entire prescribed course, pathogenic bacteria can adapt to the presence of low dose antibiotics, and eventually form a population that is completely resistant to the antibiotic regardless of the dosage.
Antibiotic usage is also not exclusive to humans. Every day, antibiotics are used to treat livestock and fish to prevent infections. Similar to overuse in humans, uncontrolled use of antibiotics creates a reservoir of bacteria that could become resistant, thus rendering the antibiotic useless.
We have learned to:
control some energy forms
destroy some energy forms
make some energy forms
Answer:
Energy can not be created or destroyed. Therefore, the only possible answer is that we learned to control some energy forms. Hope this helps :)
Explanation:
Answer:
Thae answer is "control some energy forms"
Explanation:
3)What is the epiglottis?
4)Why do the walls of the stomach secrete hydrochloric acid?
5)Which TWO parts of the alimentary canal make up the small intestine?
Answer:
3)The epiglottis is a small, movable "lid" just above the larynx that prevents food and drink from entering your windpipe. But if the epiglottis becomes swollen — either from infection or from injury — the airway narrows and may become completely blocked.
4)Your stomach lining also secretes hydrochloric acid, which creates the ideal conditions for the protein-digesting enzymes to work. The potent hydrochloric acid kills bacteria, protecting your body from harmful microbes which can enter your body in food.
5)Made up of three segments -- the duodenum, jejunum, and ileum -- the small intestine is a 22-foot long muscular tube that breaks down food using enzymes released by the pancreas and bile from the liver.
Explanation:
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True or False? Many marine organisms depend on estuaries during at least some point of their life.
Answer:
False
Explanation:
It is false because it is not true.
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3. Where are the reproductive parts of an angiosperm located?
Answer:
The reproductive parts of an angiosperm are located in the flowers. A flower of an angiosperm usually consists of four whorls namely calyx, corolla, androecium and gynoecium.
Explanation:
Stamen includes anther (where pollen grains are produced) and filament, while carpel includes stigma, style, and ovary (where eggs are produced).
In the lumen of the proximal tubule, Na concentration is ________ the Na concentration inside the cells of the tubule wall.
Answer:
The correct answer is - higher than
Explanation:
In the lumen of the proximal tubule of the kidney, most of the solutes are absorbed in the form of sodium. There is a gradient of sodium ions which allows the absorption of the solutes from the lumen into the cell.
It is due to the solute or Na concentration is higher in the lumen than Na concentration inside the cells of the tubule wall. So movement of the solutes is due to the concentration gradient.
Scientists describe the processes of photosynthesis and cellular respiration as "being interrelated". What is this statement most likely referring to?
A. The reactants of both processes are the same.
B. The products of both processes are the same.
C. The products of each process are the reactants to the other.
D. The processes occur at the same time.
Answer:
C. The products of each process are the reactants to the other.
The statement that photosynthesis and cellular respiration are interrelated means that the products of each process are the reactants to the other.
PHOTOSYNTHESIS:
Photosynthesis is the process whereby green plants obtain their food using energy from sunlight. Photosynthetic process combines carbon dioxide (CO2) and water (H2O) to form glucose and oxygen gas.CELLULAR RESPIRATION:
Cellular respiration is the process whereby living organisms obtain energy (ATP) by breaking down food molecules in their cells. Cellular respiration uses oxygen to breakdown glucose, thereby, forming carbon dioxide and water. Therefore, the statement that photosynthesis and cellular respiration are interrelated means that the products of each process are the reactants to the other.Learn more at: https://brainly.com/question/13721588?referrer=searchResults
What molecules in the cell membrane help move molecules from a low to a high concentration gradient?
Answer:
In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient).
Explanation:
Movement of individuals into or out of the population, called gene flow, impacts evolution of populations because:_________.
a. it can lead to extinction of one or more populations.
b. it may cause genetic drift.
c. it leads to a redistribution of alleles
d. adaptive radiation results.
e. a founder effect will occur.
Answer:
c. it leads to a redistribution of alleles
Explanation:
The gene flow can be defined as the movement of genetic material from one population to another within the same species. This movement may be associated 1-with the migration of individuals and subsequent reproduction of these organisms in the new population or 2-with the movement of gametes (eg., pollen dispersal) among populations. In both cases, gene flow is known to alter the frequency of particular alleles between populations and consequently also modify the evolutionary patterns of these populations.
Gene flow is the migration of genes or alleles and refers to the transfer of the genetic material. If the rate of the gene flow is high then two populations will say to be an effective population.
It just leads to redistribution of the genes or alleles with the in the popualtion of species. Hence the option C is correct.Learn more about the individuals into or out of the population, called gene flow.
brainly.com/question/12021027.
why did china remain isolated
Answer:
In the last 50 years or so of the Ming Dyansties, the emperor simply lacked the necessary resources and man power to sustain large amounts of trade, causing China to become isolated from the world.
Explanation:
A waxing moon *
pls help
occurs between a Full Moon and 3rd Quarter Moon.
occurs between a New Moon and a First Quarter Moon.
is when the light of the moon is diminishing (going away).
is when the entire face of the moon is completely illuminated.
Answer:
Between a New Moon and a First quarter Moon.
(And I think when the entire face of the moon is completely illuminated. But I'm unsure about this part.)
Explanation: