Answer:
Remove Na + from the extracellular compartment and assess the early current under new conditions
Explanation:
Na+ is a critical ion that influences the action potential in nerve cells. During the transmission of an impulse, the cell membrane is open so ions can flow through it, i.e., positively charged ions such as sodium ions (Na +) move within the cell, while negatively charged ions move outside the cell. This process produces a change in the action potential by rapidly increasing the positive charge in the nerve fiber, being thus the impulse propagated when this charge reaches +40 mv. In consequence, the effects of Na + on the single-channel current can be analyzed by removing positive ions and determining the change in the reversal potential of this channel.
Nucleus definition 
Answer:
Hello!!! Princess Sakura here ^^
Explanation:
A nucleus is a membrane-bound organelle that contains the cell's chromosomes.
Explanation:
Hey there!
Nucleus can be defined as the central part of the cell which controls activities whole cell.
It is bounded by nuclear membrane. It is composed of proteinious substances.
Hope it helps..
What is Gravity?
A- a natural phenomenon that we understand completely.
B-a natural phenomenon by which all things with mass or energy-are brought toward (or gravitate toward) one another.
B-a natural phenomenon by which all things with mass or energy-are brought toward (or gravitate toward) one another.
Which is the correct isotopic notation for a potassium ion that has 19 protons, 20
neutrons, and 18 electrons? *
i think that it is c because of the picther showes
Isotopic notation for a potassium ion which has 19 protons, 20 neutrons, and 18 electrons can be correctly denoted as ³⁹K₁₉⁺¹ or ³⁹₁₉K⁺¹. Thus, the correct option is A.
What is Isotope notation?
Isotopes can also be defined in standard notation (AZE) where, A is the mass number of the atom, Z is the atomic number, and E is the symbol of the atomic element. The mass number "A" is indicated with a superscript to the left of the chemical symbol "E" while the atomic number "Z" is indicated with a subscript.
The isotope for a potassium ion which has 19 protons (atomic number), 20 neutrons and 18 electrons. A (mass number) is the sum of number of protons and neutrons in the atom. Therefore, the correct isotopic notation is ³⁹K₁₉⁺¹ or ³⁹₁₉K⁺¹.
Therefore, the correct option is A.
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what is the three cells found in the dermis
Answer:
fibroblasts, macrophages, and mast cells.
Explanation:
Consider an experiment where your goal is to isolate Bruton’s tyrosine kinase (BTK) enzyme from a whole‑cell lysate. You have an affinity chromatography column with a tyrosine kinase inhibitor molecule covalently attached to the beads. The tyrosine kinase inhibitor binds and inhibits BTK. As a result of the experiment, you are able to elute BTK from the column, but in a mixture of other tyrosine kinases. Why are tyrosine kinases other than BTK present in the eluate?
Answer:
Kinase inhibitor has low specificity
Explanation:
In humans, Bruton's tyrosine kinase (BTK) is a protein tyrosine kinase encoded by the BTK gene, which plays key functions in the mechanisms of development, differentiation, and signaling of B-lymphocytes. In the last years, many BTK inhibitor drugs have been developed, including Ibrutinib, Acalabrutinib and Zanubrutinib. It has been shown that kinase inhibitors may have low specificity because these molecules exhibit a high conservation level in the ATP binding pocket, which is known as 'inhibitor promiscuity'.
A manager wanted to test whether the amount of noise in a clothing factory affected how
much work employees accomplished. Three groups of employees were tested every day
over a 5-day period. All three groups did the same type of work, they were all equally trained
to do the work, they used the same equipment, and they were tested the same time of day.
Group one was given headphones that blocked out all of the outside noise. Group two was
given headphones that blocked out some of the noise. Group three was not given anything
to block out the noise. The number of shirts made by the employees in one hour was
determined.
Which problem is being tested in this experiment?
How long does it take to make a certain brand of clothing?
O Which employees need more training?
O Does the amount of noise affect how much work employees do?
O Are headphones unsafe in the factory?
Answer:
The problem that is being tested is Does the amount of noise affect how much work employees do?
Explanation:
When a manager wanted to test whether the amount of noise in a clothing factory affected how much work employees accomplished, he performs an experiment modifying the amount of noise that employees endure through the use of headphones.
What the manager wants to know for sure is how much the amount of noise in the factory affects the productivity of the employees, which is expressed in the amount of shirts they can make exposed or not to the noise.
Noise reduction with the use of headphones would be expected to improve employee productivity.
The other options do not really identify the study problem, since the time it takes to make a certain brand of clothing, employee training or safety in the use of headphones in the factory is not being investigated.
Which of the following lists includes only quantitative data? * 50 ml water, water pH= 7.5, temperature= 87°F murky water, purple flower, healthy worm moist soil, grass: 10 cm, sweet smell 13 leaves, tall grass, 6 petals
Describe the Synthesis of a protein from amino acids
Answer:
Protein synthesis is the process in which cells make proteins.
what features do the sea urchins and sea cucumbers, sea brittle and sea stars have in common that identify them as a echinoderms
Answer:
Whether you are a newly certified diver (if so, we offer our congratulations) or an old salt (good for you, too), odds are you are familiar with the animals known as echinoderms.The feet hold tight to the bottom as muscles within the feet contract, enabling the animal to propel itself. Repeating this process allows echinoderms to travel in a fashion that is “more turtle than hare.”One of the most remarkable traits about echinoderms is their ability to regenerate body parts that have been lost. Many tropical destinations have learned this lesson the hard way. A sea star known as the wnwn of thorns readily preys upon living corals, and a crown of thorns invasion poses a serious, but usually temporary threat, to coral reef ecosystems. A few decades ago, when crown of thorns showed up in big numbers, resort owners asked local divers to go into the water and chop them up. Bad idea. Like many sea stars and brittle stars, crown of thorns not only regenerated lost parts, but in some instances the lost part often regenerated an entirely new animal. The not-surprising lesson here, “Don’t mess around with Mother Nature.” The ability to regenerate is an important part of the survival strategy of many species as they readily sacrifice body parts to escape predation.Sexes are separate in most echinoderms, but they look very similar and distinguishing male from female is a task best left to specialists. Reproduction is most often achieved by spawning as males and females simultaneously release sperm and eggs into the water column where sexual union occurs. The resulting larval life-forms spend from a few days to a few weeks as part of the community of plankton before settling down to live their adult lives on the sea floor.
bond formed by the sharing of electrons between atoms
Answer:
molecular bond
Explanation:
Answer:
A covalent bond, also called a molecular bond
Explanation:
Microorganisms in soil _______. a. are critical to soil health b. carry out decomposition c. make nutrients available to plants d. all of the above
Answer:
D
Explanation:
Lets consider the group known as tetrapods, these include Salamanders, Turtles and the Leopard. A. Are they a monophyletic group? (1 point) B. Is the Amniotic Egg ancestral or derived for this group (tetrapods)? (1 point) C. Is the Vertebral Column ancestral or derived for this group (tetrapods)? (1 point) Now consider the group known as fish, this includes the Lamprey and the Tuna. D. Is this a monophyletic group? (2 points) E. Why or why not? (1 point)
Answer:
Yes.
Explanation:
Yes, tetrapods are monophyletic group because the ancestor of all the tetrapods have four legs. Amniotic Egg was also comes from tetrapods which enables the reptiles to lay egg on the dry land. Yes, Vertebral Column is also derived from the evolution of early tetrapods. Yes, Lamprey and the Tuna belongs to monophyletic group because they both evolved from the common ancestor.
Why is important to know about organelles?
Answer:
it helps you understand why and how a cell functions
Explanation:
Answer:
Core organelles are found in virtually all eukaryotic cells. They carry out essential functions that are necessary for the survival of cells – harvesting energy, making new proteins, getting rid of waste and so on. Core organelles include the nucleus, mitochondria, endoplasmic reticulum and several others.
Explanation:
Organelles are also called vesicles within a cell. And they really have a function that's important, because we need to compartmentalize all the functions within the cell. So there needs to be a membrane around the mechanisms for making a different product within a cell. So really, organelles are all membrane-bound
help please..............
Answer:
The last one would be the answer, sorry if its wrong tho.
Pls help it’s due todayyyy
Answer:
the number of protons, neutron and electron for a neutral atom of nitrogen is p:7E:7N:7
Would all of the planets be on the same side as the Earth? Why?
Answer: Yes
Explanation:
Our Solar System is an orderly place, with the four inner planets, the asteroid belt, and the gas giant worlds all orbiting in the same plane around the Sun. Even as you go farther out, the Kuiper belt objects appear to line up with that same exact plane. Given that the Sun is spherical and that there are stars appearing with planets orbiting in every direction imaginable, it seems too much of a coincidence to be random chance that all these worlds line up. In fact, practically every Solar System we've observed outside of our own appears to have their worlds line up in the same plane, too, wherever we've been able to detect it.
Which are considered two of the special properties that are used to identify certain minerals? hardness and luster magnetism and fluorescence streak and color cleavage and fracture
Two of the unique characteristics that are utilized to identify specific minerals are regarded to be magnetic and fluorescence. Therefore, choice B is correct.
Minerals are chemical compounds that naturally occur in their purest form and have a well-defined composition and crystal structure. A compound is referred to as a distinct mineral if it naturally occurs in a different crystal form. A mineral's chemical makeup can differ depending on the presence of minute impurities that are present in trace amounts.
The physical characteristics of minerals include color, streak, luster, specific gravity, and cleavage; they do not exhibit magnetism. In essence, magnetism is a physical characteristic of minerals; it lacks these components. have no so-called diamagnetic magnetism. Diamagnetic materials include quartz and apatite.
To know about minerals
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The complete question is
Which are considered two of the special properties that are used to identify certain minerals?
O hardness and luster
O magnetism and fluorescence
O streak and color
O cleavage and fracture
Which process requires energy to help protect the body?
Answer:
i think exercise>>
Explanation:
14. A scientist make an experiment with 12 green plants, he placed 3 in a window
sill, another 3 outside in the garden, 3 in a closet, and 3 outside but cover them
with paper bags. After a week, the plants outside and in the window sill grew
well; but the ones in the closed and covered with paper bags died. Which one
has the best hypothesis? *
green plants turn yellow because disease
green plants do not live long
green plants need light to grow
O green plants cannot grow inside
Answer:
Green plants need light to grow
Explanation:
Answer ASAP 50 points
How do the interactions of the respiratory and circulatory systems help a multicellular organism function.Be specific and tell what organism your are explaining.
Answer/Explanation:
In humans, we breathe in oxygen via the respiratory system. The oxygen enters the lungs. The air sacs in the lungs - the alveoli - are the site of gas exchange in the lungs and are where the circulatory and respiratory systems interact.
The alveoli take in the oxygen, where it diffuses into the capillaries (circulatory system). Blood, which passes through the capillaries takes this oxygen to all the cells in the body. Oxygen binds to haemoglobin in red blood cells, which transport it around the body.
Additionally, blood also transports carbon dioxide back to the alveoli of the lungs, where it diffuses into the lungs and is expelled when we breathe out
desribe the stages of the cell cycle
Answer:
The cell cycle is a 4-stage process consisting of Gap 1 (G1), Synthesis, Gap 2 (G2) and mitosis. An active eukaryotic cell will undergo these steps as it grows and divides. After completing the cycle, the cell either starts the process again from G1 or exits the cycle through G0.
Explanation:
Hope This Helps!
What is biodiversity?
Answer:
Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity.
Explanation: u wanna know how i got the answer
(secret tip, by searching it up)
Lake Baikal is the oldest and deepest lake in the world. It is found in the middle of Siberia. In Lake Baikal there are 32 species of sculpin (a type of fish). All of these species are only found in Lake Baikal. You want to understand the evolutionary history of this group of fish and how speciation occurred for sculpin in Lake Baikal. A. What mechanism of speciation do you think has occurred in Lake Baikal sculpin. Provide your answer in the form of a hypothesis. (2 points) B. What are TWO types of additional information you would want to gather in order to test your hypothesis from A? (5 points)
Answer:
The. Two populations of sculpin lived on Lake Baikal, but a genetic change in one of the populations prevented them from crossing, thus creating a new species of sculpin.
B. The additional information I would use to test the hypotheses would be: 1) is there any species of fish similar to sculpin in the same lake? 2) what is the genetic change presented by the sculpins?
Explanation:
My hypothesis about sculpin fish states that sympathetic speciation has occurred. This speciation occurs when two populations of the same species can no longer promote crossings between them, thus creating an evolutionary process, which results in the creation of two distinct species, in the same habitat. I believe that this type of speciation is more common to happen in aquatic environments and in fish, since these environments present less physical barriers than the terrestrial environment. This usually occurs with the existence of genetic modifications within one of the populations. As a result, to test my hypothesis, I would need information about the existence of species similar to sculpin within the same lake, in addition to knowing what genetic differences between them would promote this type of speciation.
what are the main 3 types of fungi?
Answer:
Mushrooms
Molds
Yeast
Explanation:
I think
Answer:
Basidiomycota
Ascomycota
Neocallimastigomycota
Explanation: These are most likely the types of fungi that are common.
How will a soccer player maintain her
water level homeostasis
Answer:
Explanation:
En los metazoos más complejos la homeostasis se mantiene por las actividades coordinadas de los sistemas circulatorio, nervioso y endocrino. Intervienen órganos que sirven de intercambio con el medio externo, los riñones, los pulmones o las branquias el tubo digestivo y la piel.
cell walls are made of cellulose in which type of cells?
a.plants
b.bacteria
c.animal
d.algae
Answer: they are made of plant cells
Answer:
plants
Explanation:
Cellulose is the main substance in the walls of plant cells, helping plants to remain stiff and upright.
Help
Picture ahead !!
Answer:
It shoud be the second choice
Explanation:
T-T
The golgi apparatus contains cisternae, membrane-bound structures, and acts as the
Which strategy should you use to determine the number of neutrons in
an atom?
Answer:
For all atoms with no charge, the number of electrons is equal to the number of protons. The mass number, 40 is the sum of the protons and the neutrons. To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.
Which statement best explains why the gold and silver in the image are balanced?
A.) The mass of the silver is greater than the mass of the gold.
B.) The volume of the silver is the same as the volume of the gold.
C.) The volume of silver is greater than the volume of the gold.
D.) The mass of the silver is the same as the mass of the gold.
The answer is D.) The mass of the silver is the same as the mass of the gold.
Answer:
The answer is d
Explanation:
I had a test
