A form of diffusion in which the molecules pass through a protein instead of between the phospholipids is called _______

Improve the student’s model of gas exchange by drawing the missing component.

larisa [96]

Answer:

The diagram can be improved by:

Lungs

↓

oxygen

↓

Red blood cells (carrying oxygen)

↓

Organs (like stomach and liver etc) from where carbon

is taken and oxygen is supplied

↓

RBC's carrying Carbon dioxide to the lungs

The component which is missing in the diagram are the organs where exchange of gases occurs. The red blood cells carry oxygenated blood from the lungs to all parts of the body and carries the wast carbon dioxide gas from them back to the lungs. The carbon dioxide is then exhaled by the lungs.

8 0

2 years ago

Read 2 more answers

One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell

coldgirl [10]

<h2>Answer is option "A"</h2>

Explanation:

Oils and fats, which in science are called lipids, are known as amphipathic molecules. These molecules have two distinct ends to them: a water-loving (hydrophilic) side and a water-fearing (hydrophobic) side. While the hydrophilic sides of a lipid will associate with the water in a solution, the hydrophobic sides of the lipid all cluster together to 'hide' from the water. Lipids therefore cluster together and form spheres where the hydrophobic sides are in the center away from the water while the hydrophilic sides are on the outside, associating with the water.
The ability of the atoms within a group to form hydrogen bonds with the water molecules around them makes them hydrophilic. Oxygen and nitrogen atoms readily form hydrogen bonds with water molecules, so any organic molecules that have oxygen or nitrogen atoms bound to their carbon skeletons will be hydrophilic.
For example, if we take the molecule for cholesterol, we see the OH group on the left is hydrophilic and will form hydrogen bonds with water, while the ring structures, which only consist of hydrogen and carbon atoms, are hydrophobic and will not associate with the water.
There are many different kinds of lipids with different functions. Lets start by examining phospholipids, which compose the cell membranes of animals. They form lipid bilayers, with one set of hydrophilic heads facing the exterior of the cell membrane and the other set facing the interior (as you can see on the diagram on screen). The hydrophobic portions of the lipid bilayer - the lipid tails - face towards one another, which allows them to hide away from the water inside and outside of the cell.
So,the right answer is option A "amphipathic molecules".

5 0

3 years ago

The caterpillar, which is the larval stage of a butterfly, is very different from its adult form. Which phenomenon is responsibl

BigorU [14]

The correct answer to this question is a: metamorphosis. Many insects take on multiple forms through different parts of their lifecycle. For example, many lepidopteran species (i.e., butterflies) include a caterpillar juvenile stage. To reach the adult stage, the juvenile stage has to go through metamorphosis, where its adult form is strikingly different from its juvenile form.

3 0

2 years ago

For plants living in a dry areas, explain a possible conflict between the need to obtain carbon dioxide for photosynthesis and t

ahrayia [7]

Plants living in dry areas face conflict.

EXPLANATION:

Since they live in dry areas they will undergo more transpiration.

If they open stomata during the day there will be excessive loss of water vapor that will result in their death.

Therefore plants living in this area open the stomata during the night to obtain Carbon dioxide.

This checks the loss of water through transpiration and provides the carbon dioxide for photosynthesis.

7 0

1 year ago

"He was awakened in the middle of the night by a low growling that sounded as if it was coming from just outside his tent. In re

Nutka1998 [239]

Answer: Adrenaline, also known as epinephrine, is a hormone and medication. Adrenaline is normally produced by both the adrenal glands and a small number of neurons in the medulla oblongata, where it acts as a neurotransmitter involved in regulating visceral functions (e.g., respiration).It plays an important role in the fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation response and blood sugar level. It does this by binding to alpha and beta receptors.[

3 0

2 years ago

A form of diffusion in which the molecules pass through a protein instead of between the phospholipids is called ________.