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Firdavs [7]
3 years ago
5

The first line of defense involves which structure(s)?

Biology
1 answer:
olya-2409 [2.1K]3 years ago
6 0

Answer:

Skin

Explanation:

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What type of membrane proteins are integral proteins that move ions or molecules across plasma membrane?
blsea [12.9K]

Answer:

Channel proteins and Carrier proteins

Explanation:

These are type of membrane proteins that transcend the entire length of  phosphoslipid  bi- layer  in the plasma membrane.They facilitate the movement of ions  and molecules across  the walls of the plasma membranes.

Generally, substances like glucose, amino acids, are too large to pass through the phopholipid bilayers. Likewise ions of  potassium, sodium calcium, because of their polarities can not pass through either. They are ferried across the phospholipid by  group of protein structures called channel proteins. Some are also transported across by carrier  proteins.  The process by which these protein structures  aided the  diffusion of substances across the phospholipid bilayer is called Facilitated diffusion.

Channel proteins are pores, that are filled with water molecules with the entrance  well gated.  That is the entrance  is controlled by part in the inner structure  of the protein  which can open or close the pores  like a gate to control the movement of ions across it. e.g Sodium channels are gated for  movement  of sodium ions by voltage or ligands(chemicals) during  nervous  transmission to elicits action potential. Like wise Potassium channels allow  diffusion of potassium ions across the phospholipid bilayers. it gates are shut when sodium channels are open; this  regulate ion exchange.

Their structures are well fixed in shape , specific  to the substance or ions being  transported;and the rate of diffusion  depends on  the like hood of opening of the gate or closure.

Carrier molecules  also in the membranes  do not have a fixed shape, and their transport  direction is determined by the direction of concentration gradients. Thus they can flip on either sides of the membranes to aid diffusion across. Their movement can  be both passive and active, and the rates  of diffusion depends on the number of available carrier proteins in the membrane. They are also specific to the ions they transport.And are not gated,

Therefore these two membrane integral  proteins  facilitate movements of substances across the phospholipild bilayers

8 0
3 years ago
List 5 ways we can help the ocean and the organisms living in it.
mamaluj [8]

Answer:

1. Reduce Pollutants

2. Conserve Water

3. Eat sustainable seafood

4. Don't purchase items that exploit marine life

5. Don't throw trash into the ocean

Hope this helps :)

8 0
3 years ago
Read 2 more answers
Charles is an engineer who is evaluating a prototype of an artificial heart. The prototype beats in a synchronized fashion, is h
Scorpion4ik [409]

The correct answer is a structure that would differentiate the hollow heart into chambers to separate oxygenated blood.

The heart has four chambers: two ventricles and two atria. The right atrium gets oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-deficient blood to the lungs.

The left atrium gets oxygen-enriched blood from the lungs and pumps it to the left ventricle, and the left ventricle pumps the oxygen-enriched blood to the body. The right and left atrium are distinguished by a wall of tissue known as the atrial septum, and the left and right ventricles are separated by the ventricular septum.


5 0
3 years ago
Read 2 more answers
Write the function of synaps​
vekshin1

Answer:

The function of synapse is to transmit the electrical impulses from one neuron to other.

Explanation:

hope it help goodluck:)

6 0
2 years ago
Read 2 more answers
What dictates how we assemble amino acids to build proteins, tissue, and organs?
Nina [5.8K]

Answer:

C- DNA

Explanation:

DNA is responsible for protein synthesis.

6 0
3 years ago
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