1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhuklara [117]
3 years ago
15

I need a answer please!

Biology
1 answer:
iogann1982 [59]3 years ago
8 0

Answer:

I think it is A

You might be interested in
Is the movement of water along the concentration gradient
Nuetrik [128]

Answer:

<em>- Is the movement of water along the concentration gradient: </em><em>Osmosis</em><em>. </em>

<em>- Is the use of energy to move the particles against the concentration gradient: </em><em>Active transport</em><em>. </em>

<em>- Is the movement of particles by diffusion without energy: </em><em>Simple diffusion</em><em>. </em>

<em>- Is the movement of particles along the concentration gradient: </em><em>Passive transport</em><em>.</em>

Explanation:

The mechanisms of cellular transport involve all the processes that the cell carries out to incorporate substances into its interior or send them to the extracellular space, through its semipermeable cell membrane.

<h3>- Osmosis</h3>

Is a type of transport that consists of the passage of water from a space with a lower concentration of solutes to one with a higher concentration, in order to reach equilibrium, following a concentration gradient.

The concentration gradient is given by the difference in concentration between two substances, which indicates the direction in which molecules, such as water, should move from one place to another.

<h3>- Active transport</h3>

Unlike passive transport mechanisms, which depend on a concentration gradient that determines the movement of particles, in active transport there are two characteristics that define it:

The passage of substances into the cell against a concentration gradient.

The use of energy to carry out this process.

In this case, the passage of substances through the cell membrane will be according to the requirements of the cell, or when they cannot pass through the membrane.

<h3>- Simple diffusion</h3>

According to the characteristics of the cell membrane, some substances can pass freely through it while others require special mechanisms. When a molecule is able to pass through the membrane without the use of special mechanisms or energy we speak of simple diffusion.

In a cell membrane, whose composition is by hydrophobic or non-polar lipid molecules, simple diffusion allows the passage of non-polar molecules, gases and alcohol.

<h3>- Passive transport</h3>

Refers to the mechanism of entry and exit of substances from the cell that does not require the use of energy.

The mechanisms involved in the passive transport of the cell are simple diffusion, osmosis, facilitated diffusion - which requires special conveyors or channels - and ultrafiltration, which depends on hydrostatic pressure. Examples of substances using this mechanism are lipid molecules, water and electrolytes.

Learn more:

Lipidic bilayer and cellular transport brainly.com/question/6955159

3 0
3 years ago
9.
svetoff [14.1K]

Answer:

The body parts are arranged like spokes on a wheel

Explanation:

Bilateral symmetry is when it is as two halves. And the other two options are not types of symmetries.

3 0
3 years ago
What is the function or the role of mitosis in a cell that is about to divide?
Zanzabum
Mitosis is cell division in to daughter cells with the same chromosome number as the parent cell
3 0
3 years ago
Of the following choices, what is the approximate LD50 of the least toxic substance? 20 mg/kg, 70 mg/kg, or 130 mg/kg
pychu [463]

The approximate LD50 of the least toxic substance will be 130 mg/Kg.

  • The dose necessary to cause the death of 50% of a population under test after a predetermined test period is known as the LD50 value for a drug.
  • Commonly used as a broad indicator of a substance's acute toxicity are LD50 values.
  • Greater toxicity is indicated by a lower LD50. A low LD50 of 500 mg/kg or less implies severe toxicity.
  • Moderate toxicity is indicated by an LD50 of 500 to 1,000 mg/kg. A modest toxicity level of 1,000 to 2,000 mg/kg is indicated.
  • The species is especially vulnerable to the poison if the LD50 is low. The lethal dose (LD50) of a specific poison might change significantly between several animal species.
  • Thus out of all the options, LD50 130 mg/kg will have the lowest toxicity and 20 mg/kg will be the highest.

learn more about LD50 here: brainly.com/question/24845532

#SPJ1

8 0
1 year ago
A client who is on monoclonal antibody medication reports rigors, headache, myalgia, and gastrointestinal disturbances. the medi
Mama L [17]
<span>Muromonab-cd3 can activate T cells to release cytokines within the body. This excess of cytokines is likely what is producing these symptoms in the client. The client should start taking some type of glucocorticoid, as well as acetaminophen and diphenhydramine to reduce global inflammation and counteract the effects of the Muromonab-cd3.</span>
5 0
3 years ago
Other questions:
  • Which of the following is not a characteristic of all living things ?
    14·1 answer
  • What’s the difference between a standing defense and an induced defense?
    9·1 answer
  • If your mother is homozygous recessive and your father is heterozygous for the autosomal dominant huntington disease, what are y
    10·1 answer
  • Identify two food chains that share at least one organism. Write each food chain below, showing the flow of energy with arrows.
    13·2 answers
  • A marine biologist discovers a new species of green algae, which, under the microscope, appears to be multinuclear. Which of the
    6·1 answer
  • Why is weathering slow in cold dry places
    6·2 answers
  • Which type of weathering most often occurs in windy environments?
    8·1 answer
  • What are some other biotic and abiotic factors that may influence the mouse and hawk populations?
    10·1 answer
  • Which of he following represents a group of tissues working together to perform a specific funcion
    14·2 answers
  • Which body system is most responsible for the removal of waste?.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!