How do both sodium and potassium ions travel​

Answer:

Sodium ions pass through channels in the hydrophobic barrier that have been formed by membrane proteins. The crossing membrane is called facilitated diffusion because it is facilitated by the channel

Potassium ions have to be transocated through specific membrane transport proteins. It is then transported into the cell through potassium pumps with energy being consumed int the form of ATP.

The sodium-potassium pump goes through cycles of shape changes to help maintain a negative membrane potential. In each cycle, three sodium ions exit the cell, while two potassium ions enter the cell. These ions travel against the concentration gradient, so this process requires ATP.

Explanation:

Answer:

The sodium potassium pump goes through cycles of shape changes . In this way they help maintain a negative membrane potential. In each cycle, two potassium ions enter the cell while three sodium ions exit the cell . These ions travel against the concentration gradient. And this process requires ATP.

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the eye is a delicate organ, which is formed from multiple_____?
AHHHH please helpp!!!

*
Which example is NOT an outcome of the ecosystem modifying a phenotype?
A.the changing of the color of an animal's fur as the temperature changes
B.the increased intelligence of a person who attended school for many years
C.the pink-flowered snapdragons that result from crosses between red-flowered and
white-flowered snapdragon plants
D.the very short stature of a kind of tree that grows at a high altitude in comparison with
the same kind of tree growing at a lower altitude

Transcribe the following strand of DNA into mRNA:
DNA: TAC-GCC-GAC-ACT

The elephant and silverback are similar because they both travel looking for *
Water
Fruits and seeds
A mate

Curly hair (C) is dominant where straight hair (c) is recessive. If a person who is CC were to have children with a person who is cc, could it be possible for them to have a child with straight hair?

a
yes
b
no

why do hot springs in Yellowstone national park at wooden walkway built around them

sample 1
sample 2
sample 3
sample 4

As you increase altitude, air pressure increases.
True
False

A chewing insect damages the vascular tissue of a plant system. This damage will most directly affect the

n the picture below, what are biotic factors?

How is natural selection similar to selective breeding? How is natural selection different from selective breeding?

True or false glucose is the primary nutrient for all living things

The leaves of plants have many specialized structures. Which statement explains the importance of the stomata and guard cells for the plant?
o They protect the plant from pests
o They are involved in plant reproduction
They work together to regulate water loss and gas exchange.
o They regulate the amount of water that enters the plant for cellular respiration

Which one is the true answer

A land breeze occurs during the ________ because the air above the land is a _________ pressure

What is the best reason that producers are the most numerous group in an ecosystem?

A. Producers produce food energy for themselves and all the other levels

B. There is more room for small organisms than there is for large ones.

C. As energy flows through the ecosystem some anergy is added at each step.

D. Soil and temperature conditions is an ecosystem always favor producers.

What would happen within a few months if all decomposers on Earth disappeared overnight?
There would be an overabundance of organic waste.
Plants would grow out of control.
Animals would grow out of control.
There would be no visible impact.

A scientific _______ is an explanation based on many observations by many different researchers.

A scientific _______ is usually an explanation based on one observation by one researcher.
A.
theory; hypothesis
B.
deduction; inference
C.
hypothesis; theory
D.
inference; deduction

How does gene expression differ between human fibroblasts and induced pluripotent stem cells (iPS)?

I am giving 15 ponits! pls answer!!
How do you predict that a change to a single nitrogen base, such as an adenine or a thymine, could affect the function of a gene?

What is the difference in height between low tide and high tide on Wednesday?

which one of the following answers has clear ectoplasm, pseudopodium, nucleus, contractile vacuole, cell membrane, and granular endoplasm
A.Protista
B.Animalia

Select the activities in which crop estimates play a critical role.


develop sampling pattern

plan harvest and storage requirements

estimate necessary soil inputs

obtain delivery estimates

budget for cash flow

obtain organic certification

obtain crop insurance

organize recommended timing

Sharks protect producers (sea grasses)
by
acting as abiotic limiting factors
allowing populations of sea grass consumers
(organisms that eat sea grass) to grow
uncontrollably
keeping the populations of sea-grass.
consumers in check (controlled)

Do mutations in body cells contribute to genetic variation?(1 point)

A) No, the causes of body cell mutations are outside the body and cannot alter DNA.

B) Yes, the mutations can be passed on to offspring and contribute to variation in the population.

C) Yes, these body cell mutations lead to mutations in the gametes.

D) No, the mutations cannot be passed to offspring and only affect the individual.

If two organisms are in the same order, which statement is also true?
A. Same species
B. Same family
C. Same genus
D. Same class

Scientists have discovered a fossil skeleton of a whale-like creature that lived in the early Eocene epoch. The skeleton shows an organism with large fore and hind limbs with distinct toes. Fossil skeletons of closely related species from later periods show organisms lacking hind limbs. Which conclusion does this observation best support?

A. Ancestors of whales may once have been able to walk.

B.Ancestors of whales had fewer bones than modern whales.

C. Whales and their ancestors have always been ocean dwellers.

D. Whales and their ancestors have always been the largest living ​

50 POINTS

How can the environment impact a particular population of a species?

Compare the composition of Nucleic acids to lipids

I am made up of nucleotides. Am I DNA RNA or both?