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Monica [59]
3 years ago
13

At the beginning every heartbeat the heart is what?

Biology
1 answer:
PSYCHO15rus [73]3 years ago
6 0

Answer:

The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen ... It sends out an electrical signal to start the contracting (pumping) of the heart muscle.

Explanation:

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The mass of an atom is contained primarily in its _____. A. Electron Shell B. Nucleus C. Proton D. Size
igor_vitrenko [27]
The mass of an atom is contained primarily in its NUCLEUS.
An atom is made up of three sub particles, which are proton, neutrons and electrons. The proton and the neutrons are located in the nucleus of the atom while the electron  are located outside the nucleus where they move about in continuous motion around the nucleus. The proton and the neutrons, which are located in the nucleus have the same relative mass of 1, which has been estimated to be about 2,000 times bigger than that of the electron, which has a relative mass of 0.0005. This shows that, the mass of an atom is located primarily in its nucleus. <span />
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3 years ago
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Mendel's Law of ________ states that alleles for 2 different genes separate during meiosis and segregate independently.
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Mendel’s law of segregation
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2 years ago
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What is true about cellular respiration and 2 facts about photosynthesis and cellular respiration
makvit [3.9K]

Answer:

* The glucose needed for Cellular respiration is delivered by plants. Plants experience a process known as photosynthesis.

* Photosynthesis can be considered as the contrary process of Cellular respiration. Through two processes known as the light reactions and the dark reactions, plants can assimilate and use the energy in daylight. This energy is then changed over alongside water and carbon dioxide from the environment into glucose and oxygen.

* Since this is the contrary process of Cellular respiration, plants and animals are said to have a cooperative relationship. This implies that plants and animals live respectively and advantage from one another.

Explanation:

Cellular respiration is the process by which the substance energy of "food" particles is delivered and incompletely caught as ATP. Starches, fats, and proteins would all be able to be utilized as fills in cellular respiration, yet glucose is most normally utilized as an illustration to analyze the responses and pathways included.

3 0
2 years ago
Which statement best describes a keystone species
professor190 [17]

The answer is D

One way to remember this is when you are building a bridge there is one piece right in the middle that keeps the whole thing from collapsing that is called the key-stone. If a keystone species goes extinct then the rest of the ecosystem will crumble around it.

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3 years ago
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chambers A and B are placed next to each other but are separated by a film permeable to both glucose and fructose. chambers A co
Molodets [167]

Answer:

2.glucose move into chamber B faster than fructose

Explanation:  

  • Facilitated diffusion: refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this <u>passive transport</u>. If uncharged molecules need to be carried <u>this process depends on concentration gradients</u> and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.  Facilitated diffusion is a passive transport process because the cell does not need any energy to make it happen.  

The exposed scenario is an example of facilitated diffusion, a process that occurs in favor of the concentration gradient, and which rate depends on the concentration of molecules in each side of the membrane, in this case, glucose and fructose, among other factors that might also influence the diffusion rate. So, as the concentration of glucose is higher in chamber A (80%), and lower in chamber B (20%), in comparison with fructose, the first one will diffuse faster than fructose. The difference in concentration between both chambers is sharper in glucose, so its transport is faster than the fructose transport, which will also diffuse but at a lower rate.

7 0
3 years ago
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