What chemical ion is responsible for initiating the contraction of a muscle fiber?

Which of the following best describe gas particles?

timama [110]

Answer:

a, b, d (see below)

Explanation:

So, looking at the 3 states of matter:

Solid - holds a shape and is made up of particles that vibrate in place (because particles are always moving no matter what)

Liquid - holds shape of its container and has particles with some space in between them that allow them to flow

Gas - holds shape of its container and has particles with huge gaps of space between them that are always, constantly moving and zooming around

Refer to the image below for a better visual understanding.

So, now, looking at the answer choices:

a) moving randomly

Yes. They are—they're speeding around super fast all the time.

Every time heat is added to something, the particles start loosening up and moving. A lot.

So when you add heat to a solid, it starts loosening up and moving around until it becomes flowy enough to be a liquid. Then, if more heat is added, the particles moving faster and loosen up even more until they're a gas.

Imagine doing that one more time, and you'll have plasma. As you may have guessed it, plasma moves super fast

b) collide into each other

Yes. Because they're moving so fast and uncontrollably all the time, they're bound to have rammed into one another a few or more times.

Imagine bumper cars at a carnival, except the speed of each car is sooo fast that you could be on a highway. You're probably going to hit someone, which is why bumper cars are not that fast in reality. For safety reasons.

c) move slow

No. Since we know that they're always zooming around (refer to my bumper car example above, in bold), they obviously can't be slow.

d) high kinetic energy

Yes. Anything moving (a.k.a. in motion) has kinetic energy. If gases zoom super fast 24/7, they will have high kinetic energy.

Having high kinetic energy means that the something is moving really fast or a lot. In this case, gases are both.

e) moving orderly

No. They're moving everywhere and really fast, so they have no control over how they move because of how fast they are.

(refer to my bumper car example in answer b, in bold)

7 0

2 years ago

If you eat a hamburger, you are mainly eating ground-up beef muscle. what levels of organization are represented in this ground-

Ghella [55]

The right answer is: organelle, cell, and tissue

Muscle is a soft tissue, found in animals. Composed of muscle tissue and connective tissue (+ blood vessels + nerves). The muscle cells (a component of the muscle tissue) contain actin and myosin protein filaments that slide on each other, producing a contraction that changes both the length and shape of the cell.
The muscle cells, like other cells, consists of a plasma membrane containing a cytoplasm, which is formed of an aqueous solution (Cytosol) in which there are many biomolecules such as proteins and nucleic acids, organized or not in the context of organelles.

5 0

3 years ago

Read 2 more answers

When his husband turns out the light at night, Rodney cannot see anything at all in his bedroom. After a while his eyes adjust a

saul85 [17]

Answer:

rod photoreceptors

Explanation:

The retina of the eye has 2 types of sensory receptors or photoreceptors. They are the rod cells and the cone cells. The rod cells mostly found at the outer edge of the retina of the eye, which are numerous and more sensitive compared to the cone cells. The cone photoreceptors are found in the macula.

The rod photoreceptors are responsible for night vision mainly and function in dim light or less intense light, while the cone receptors are responsible for color sensitivity.

The rod photoreceptors are responsible for processing his ability to see objects in the darkness.

3 0

3 years ago

What is the function of adrenaline in the digestive system?

ehidna [41]

Nerve Regulators: Two types of nerves help to control the action of the digestive system. Extrinsic (outside) nerves come to the digestive organs from the unconscious part of the brain or from the spinal cord. They release a chemical called acetylcholine and another called adrenaline

8 0

3 years ago

A bacterium that you isolated from pond water appears to use light for energy. Based upon this information, you inoculate the or

FinnZ [79.3K]

The question is incomplete as it does not have the options which are:

there was no sulfur compound added to the medium, that could be used as an electron donor.
no oxygen was added to the medium so the organism died.
there is some inhibitory chemical that is preventing the growth of the bacterium.
you were using the wrong type of sunlight as the energy source for the bacterium.

Answer:

There was no sulfur compound added to the medium, that could be used as an electron donor.

Explanation:

In the given question, the bacteria which are found in the pond uses light energy to use carbon dioxide and form the glucose molecule. These bacteria are known as phototrophic bacteria.

The process of photosynthesis requires an electron donor and an electron acceptor to use molecule.

The organism when provided the light and carbon dioxide artificially in a culture, the bacteria were not able to grow. The reason for this could be accounted as that there was no electron donor found in the media like sulfur which could donate the electron during the chain reaction.

Thus, the selected option is correct.

4 0

2 years ago