How do polar water molecules pass through the plasma membrane? (3 points)
Water molecules pass through channel proteins to cross the membrane.
Water molecules can pass through the membrane freely and rapidly.
Water molecules dissolve into the lipid bilayer and cross the membrane.
Water molecules attach to cholesterol and cross the membrane.

Answers

Answer 1
Water passes through the membrane in a diffusion process called osmosis. During active transport, energy is expended to assist material movement across the membrane in a direction against their concentration gradient. Active transport may take place with the help of protein pumps or through the use of vesicles.

Related Questions

just answer the questions and pull sentences 4-5
:(

Answers

Answer:

top carnivore is alligator sorry o dont really know much about the others hope this helps a little bit

members of phylum rotifera are single-celled organisms.

Answers

Answer:

False

Explanation:

hope i helped

what is the function of carbohydrates for the body

Answers

Answer:

to provide energy to the body

Explanation:

The function of carbohydrates for the body is mainly to provide us with energy. Carbohydrates are broken down into simple sugars and are absorbed into your bloodstream!

how does cardiac muscle differ from skeletal muscle

Answers

Answer:

Cardiac muscle differs from skeletal muscle in that it exhibits rhythmic contractions and is not under voluntary control.

all female mammals have one active x chromosome per cell instead of two. what causes this?

Answers

Answer:

maybe its because of pregnancy

Explanation:

which statement is true about cell differentiation?

Answers

Answer:

It causes cells to change and specialize.

Explanation:

hope this helps you if it does please mark brainiest

when inactive, the alpha subunit of the g-protein is bound to:

Answers

Answer:

the beta-gamma subunit to form an inactive trimeric protein.

Explanation:

When inactive, the alpha subunit of the G-protein is bound to a GDP molecule.

The guanine nucleotide-binding proteins (commonly called G proteins or GTPases) represent an evolutionarily conserved protein family that serves to switch on/off different signaling pathways within the cell.

G-proteins are composed of three different subunits: Gα, Gβ, and Gγ subunits.

When GDP is bound to , this subunit remains bound to the Gβ subunit in order to form an inactive heterotrimeric protein.

When GTP is bound to the G-protein, then Gα dissociates from the other subunits and triggers the activation of the G-protein.

In conclusion, when inactive, the alpha subunit of the G-protein is bound to a GDP molecule.

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The table below shows some of the ingredients in the four different drinks. Which of these drinks would give an athlete the most energy we litre

Answers

Answer: 2

Explanation: the numbers add up to make the highest number

The geosphere gives the planet the mass it needs to keep the atmosphere from escaping into space

it’s a true or false question.

Answers

I’m going to say, false. Gravity is what keeps the Earth from escaping into space. Gravity pushes down on all of Earth’s atmosphere, keeping it from leaving into space. (Sources: scijinks.gov, Madison.com)

plants use the ____________ to make organic molecules.

Answers

The answer is light-independent reactions.

there are 22 grams of media per 1000 mL of liquid, how many grams of media would it take to make only 100 mL of liquid?

Answers

Answer:

1ml

Explanation:

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How do cells make energy?

Through photosynthesis.
Through the breakdown of macromolecules.
Through exercise.
Through the production of methane.​

Answers

Answer:

through the break down of macromolecules

The answers is b
Through the breakdown of macromolecules

During one year, the birthrate in a country is 28 births per 1000 people, and the death rate is six deaths per 1000 people. What is the population growth rate?

Answers

Answer: 22

Explanation: 28/1000-6/1000=22/1000

Birth rate is the births per 1000 people which is subtracted by the death rate which is the deaths per 1000 people, this phenomenon is known as Population growth rate. So, 22/1000 is the population growth rate for this.

What is Birth Rate?

Birth rate is the total number of people born per year per 1000 in the population. Birth rate is also known as Natality.

For example, if 65 births occur per year per 1000 individuals, the birth rate is 65. If it is expressed in the percentage, it is 6.5 per 100 or 65%.

Population is divided into many parts like Juveniles (Period before puberty), adults and Post reproductive adults. Birth rate is higher than the death rate as the population is younger, the faster that population grows.

When the birth rate is expressed as per the age group, this is called the standardized birth rate. Birth Rate is determined by the ratio between the number of live births in a population during a year and total mid-year population for the same year multiplied by 1000.

Thus, birth rate is the births per 1000 people which is subtracted by the death rate which is the deaths per 1000 people, this phenomenon is known as Population growth rate. So, 22/1000 is the population growth rate for this.

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why do tropical rainforest ecosystems have the highest productivity
check all that apply
1.A lot of light
2. A lot of water
3. A lot of photosynthetic organism
4. A lot of organism that carry out cellular respiration ​

Answers

Answer:

i think its all of them

Explanation:

why do you think it is important to understand chemistry and chemical cycles? Write at least 5 sentences.

Answers

Explanation:

Image result for why do you think it is important to understand chemistry and chemical cycles

Chemical cycling plays a large role in sustaining planetary atmospheres, liquids and biological processes and can greatly influence weather and climate. Some chemical cycles release renewable energy, others may give rise to complex chemical reactions, organic compounds and prebiotic chemistry.

Chemical reactions help us understand the properties of matter. By studying the way a sample interacts with other matter, we can learn its chemical properties. These properties can be used to identify an unknown specimen or to predict how different types of matter might react with each other

Answer:

Chemistry is essential for:

1. meeting

2. our basic needs of food,

3. clothing,

4. shelter,

5. health,

6. energy,

7. clean air,

8. water,

9. soil.

Knowing something about chemistry is worthwhile because it provides an excellent basis for understanding the physical universe we live in. For better or for worse, everything is chemical!

Explanation:

Hope it helps you

the connective tissue covering around a fascicle is the

Answers

Answer:

a layer of connective tissue called the perimysium.

Explanation:

8. What muscle is immediately medial to the brachioradialis?

Answers

The brachioradialis’ proximal part is medically covered by the distal part of the brachialis muscle, while the tendon of biceps brachii passes deep to it, on it’s way towards the radial tuberosity.


Q.1. Which of the following statements is false?

a) The particles in a solid are packed tightly together and can only vibrate in place.

b) Liquid particles are moving more slowly than gas particles.

c) Particles in the gas are much farther apart than particles in liquid or solid.

d) The particles in a solid have more energy than the particles in a liquid.​

Answers

The answer is D because the particles in a liquid have more kinetic energy than the particles in the corresponding solid.

4. What muscle joins with the short head of the biceps brachi?

Answers

Answer:

attaches to the coracoid process of the scapula

Why are bacteria called the borderline between plants and animals​

Answers

Answer:

it's because they have the both characteristics of plants and animals

example:-

bacteria have cell wall that is a characteristic of the plants.but at the same case they also produce some nucleic acids that are only found in animals.

so, they are the borderline between plants and animals.

Explanation:

brainliest plz

Why isnt there a solar eclipse during every new moon?

Answers

Answer:

Eclipses do not happen at every new moon, of course. This is because the moon's orbit is tilted just over 5 degrees relative to Earth's orbit around the sun. For this reason, the moon's shadow usually passes either above or below Earth, so a solar eclipse doesn't occur.

Explanation:

Make this in own words if it's for a test or smth

Explanation:

Solar eclipse don't happen every new moon, because the moon's orbit tilted over degrees relative to the earth's orbit around the sun. The moon's shadow usually passes either above or below earth, so therefore that is the reason a solar eclipse does not occur every new moon

describe a mature community. how does a mature community develop?

DUE IN 30 MINUTES HELP

Answers

Answer: simply has organisms*living things) that are well adapted to live together in the same area over time.

Paired funnel shaped organs used for excretion in annelids

Answers

Answer:

Nephrdia(metanephridium)

a paleoanthropologist specializes in the study of the

Answers

Explanation:

study of human evolution through the fossil and archaeological records

POSSIBLE POINTS: 3
are made from smaller building blocks known as nucleotides. Their main function is
Two examples include

Answers

Answer:

Proteins are composed of amino Acids

Answer:

Nucleic acids are made from smaller building blocks known as nucleotides.

The main function of nucleotides: is to form polynucleotides, which are strands of genetic information that can wrap around each other to form a DNA double helix.

Explanation:

prokaryotic cells are smaller than eukaryotic cells. what is a plausible explanation?

Answers

Answer:

prokaryotic cells are smaller than eukaryotic cells because they have fewer organelles.

Explanation:

prokaryotic cells do not contain a nucleus, vacuoles, endoplasmic reticulum, mitochondria, Golgi apparatus, lysosomes, or peroxisomes, thus making them smaller than eukaryotic cells.

how to find percentage change in mass
and how to find change in mass if you're only given the mass before and mass after? ​

Answers

Answer:

Mass Difference= Final Mass- Initial Mass

To find the “Percent Change in Mass,” divide the “Mass Difference” by the “Initial Mass.”

Explanation:

About_____________ percent of the solar energy reaching the outer atmosphere is reflected or scattered back into space.
ANSWER ASAP
a.10
b.30
c.50
d.90

Answers

Answer:

What is b.30

Explanation:

About 29 percent of the solar energy that arrives at the top of the atmosphere is reflected back to space by clouds, atmospheric particles, or bright ground surfaces like sea ice and snow. This energy plays no role in Earth's climate system.

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What biomolecule is a cell with a lot of ribosomes attached to its rough endoplasmic reticulum probably specialized to manufacture?

Answers

Answer:Ribosomes are the cellular structures responsible for protein synthesis. When viewed through an electron microscope, ribosomes appear either as clusters (polyribosomes) or single, tiny dots that float freely in the cytoplasm. They may be attached to the cytoplasmic side of the plasma membrane or the cytoplasmic side of the endoplasmic reticulum and the outer membrane of the nuclear envelope. Electron microscopy has shown us that ribosomes, which are large complexes of protein and RNA, consist of two subunits, aptly called large and small (Figure 1). Ribosomes receive their “orders” for protein synthesis from the nucleus where the DNA is transcribed into messenger RNA (mRNA). The mRNA travels to the ribosomes, which translate the code provided by the sequence of the nitrogenous bases in the mRNA into a specific order of amino acids in a protein. Amino acids are the building blocks of proteins.

Because proteins synthesis is an essential function of all cells, ribosomes are found in practically every cell. Ribosomes are particularly abundant in cells that synthesize large amounts of protein. For example, the pancreas is responsible for creating several digestive enzymes and the cells that produce these enzymes contain many ribosomes. Thus, we see another example of form following function.

Mitochondria

Mitochondria (singular = mitochondrion) are often called the “powerhouses” or “energy factories” of a cell because they are responsible for making adenosine triphosphate (ATP), the cell’s main energy-carrying molecule. ATP represents the short-term stored energy of the cell. Cellular respiration is the process of making ATP using the chemical energy found in glucose and other nutrients. In mitochondria, this process uses oxygen and produces carbon dioxide as a waste product. In fact, the carbon dioxide that you exhale with every breath comes from the cellular reactions that produce carbon dioxide as a byproduct.

In keeping with our theme of form following function, it is important to point out that muscle cells have a very high concentration of mitochondria that produce ATP. Your muscle cells need a lot of energy to keep your body moving. When your cells don’t get enough oxygen, they do not make a lot of ATP. Instead, the small amount of ATP they make in the absence of oxygen is accompanied by the production of lactic acid.

This transmission electron micrograph of a mitochondrion shows an oval outer membrane and an inner membrane with many folds called cristae. Inside the inner membrane is a space called the mitochondrial matrix.

Figure 2. This electron micrograph shows a mitochondrion as viewed with a transmission electron microscope. This organelle has an outer membrane and an inner membrane. The inner membrane contains folds, called cristae, which increase its surface area. The space between the two membranes is called the intermembrane space, and the space inside the inner membrane is called the mitochondrial matrix. ATP synthesis takes place on the inner membrane. (credit: modification of work by Matthew Britton; scale-bar data from Matt Russell)

Mitochondria are oval-shaped, double membrane organelles (Figure 2) that have their own DNA and ribosomes (we’ll talk about these later!). Each membrane is a phospholipid bilayer embedded with proteins. The inner layer has folds called cristae. The area surrounded by the folds is called the mitochondrial matrix. The cristae and the matrix have different roles in cellular respiration.

Peroxisomes

Peroxisomes are small, round organelles enclosed by single membranes. They carry out oxidation reactions that break down fatty acids and amino acids. They also detoxify many poisons that may enter the body. Many of these oxidation reactions release hydrogen peroxide, H2O2, which would be damaging to cells; however, when these reactions are confined to peroxisomes, enzymes safely break down the H2O2 into oxygen and water. For example, alcohol is detoxified by peroxisomes in liver cells. Glyoxysomes, which are specialized peroxisomes in plants, are responsible for converting stored fats into sugars.

Explanation:

during which checkpoint would damaged or improperly replicated dna halt progression through the cell cycle?

Answers

Answer:

G2/Growth 2 phase

Answer:

When a cell's DNA is damaged, a sensor protein activates p53, which halts the cell cycle at the G 1start subscript, 1, end subscript checkpoint by triggering production of a cell-cycle inhibitor. This pause buys time for DNA repair, which also depends on p53, whose second job is to activate DNA repair enzymes.

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