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
barxatty [35]
3 years ago
15

What type of transport requires energy to move sodium ions from a low concentration across the intestinal wall into a higher con

centration?
A) Diffusion

B) Active transport

C) Osmosis

D) Passive transport
Biology
2 answers:
iris [78.8K]3 years ago
6 0

Active Transport is the answer

max2010maxim [7]3 years ago
4 0

Answer:

The correct answer is option B, that is, active transport.

Explanation:

In order to move a substance against an electrochemical gradient or concentration gradient, a cell needs energy. Thus, for this a cell follows active transport mechanisms, for this, energy is expended in the form of ATP in order to sustain the appropriate concentrations of molecules and ions in the living cells.  

The active transport refers to the phenomenon in which the movement of molecules or ions takes place through a cell membrane from the region of lower concentration to a region of a higher concentration, facilitated by the enzymes and the process requires energy in the form of ATP.  

You might be interested in
The Punnett square shown presents a cross between two piranhas. Both parents have large teeth.
Llana [10]

Answer:

The correct answer would be C)  75% large-toothed and 25% small-toothed.

It can be explained with the help of the law of dominance which states that the dominant allele expresses itself completely over the recessive allele in the heterozygous condition.

So, the genotype TT, as well as Tt, will result in the production of dominant trait or character in the offspring.

Thus, three (1 TT and 2 Tt) out of four offspring would have large teeth and only one offspring (tt) would have small teeth.

Hence, we can conclude that 75% of the offspring will have large teeth and only 25% will have small teeth.

8 0
3 years ago
Read 2 more answers
How do trees act as carbon sinks?
Romashka [77]


The best answer is D.

A carbon sink is anything that absorbs more carbon than it produces or releases.

The main carbon sinks found in nature are plants, the ocean and soil.  Plants such as trees capture carbon dioxide from the atmosphere and use it in photosynthesis. Part of this carbon is transferred to soil as the trees and other plants die and decompose.

Due to the effectiveness of trees and other plants as carbon sinks,  the Kyoto protocol proposed that emission reduction can be achieved through absorption of carbon dioxide by these plants. 



5 0
3 years ago
Read 2 more answers
There are different types of nerves or mechanoreceptors located in your skin. Nerves that detect deep pressure are called _____.
UNO [17]

Nerves that detect deep pressure are called Pacinian corpuscles.

Pacinian corpuscles are microscopic onion-shaped nerve structures that are situated in the dermis and hypodermis. Pacinian corpuscles detect deep pressure and vibration. This nerve has a myelinated nerve ending in the middle of its structure and the external layer contains flattened cells, a lymph-like fluid and collagen fibers. The structure of pacinian corpuscles provides a fast response and rapid recovery by transmitting fast events. This make them sensitive to pressure and vibration.


7 0
2 years ago
Read 2 more answers
Which type of vessel carry needed materials including gases and nutrients around to body? TWO(2)
Alex787 [66]
Artillery and codlery vessels
8 0
3 years ago
Corals and the algae that live in coral polyps have a special relationship. Each contributes something that the other needs to s
scoundrel [369]
The coral provides the algae with a protected safe environment (a home) and compounds they need for photosynthesis. The algae in return, produce oxygen and help the coral to remove wastes. Most importantly, zooxanthellae supply the coral with glucose, glycerol, and amino acids, which are the products of photosynthesis.
7 0
3 years ago
Other questions:
  • The lumper potatoes that were grown in Ireland during the 1800s were essentially clones of one another. They all had the same ge
    8·1 answer
  • It is likely that Earth could lose half of its species in the next ____________ years.
    7·2 answers
  • What are two brand new cells called hint
    6·1 answer
  • Many bedbugs are highly resistant to insecticides, but the scientist’s bedbugs aren’t resistant. Explain why this happens based
    5·1 answer
  • Why might it be important to the survival of a species that mutations to dna cause changes in organisms?
    14·1 answer
  • Mr. Smoke has had a persistent cough and hoarseness for several months. The doctor has scheduled Mr. Smoke for an examination of
    5·1 answer
  • A drought is a period of unusually low
    8·1 answer
  • What are the effects on the ecosystem and what is being done to help. ​
    14·1 answer
  • Which organelle is correctly matched with the cell process it performs?
    13·2 answers
  • A template strand of DNA contains nucleotides in the following proportions: 14% adenine
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!