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Jlenok [28]
3 years ago
7

!!! Please answer this ASAP!!!

Biology
1 answer:
ValentinkaMS [17]3 years ago
6 0

Chemotherapy targets fast growing cells , including cancer cells ,skin cells, Gastro intestinal cells, blood cells etc.

Explanation:

  • Chemotherapy refers to use of chemicals to treat diseases like, cancer.
  • This procedure involves the use of cytotoxic chemicals that inhibit mitosis.
  • Drugs used in Chemotherapy principally target fast growing cells of the body .
  • Thus along with cancer cells these drugs also effect normal body cells such as , blood cells, skin cells etc.
  • Damage to blood cells weakens the immune system and the patient is susceptible to other diseases also.
  • To avoid such situation chemotherapy is accompanied with other combination medicines.
  • Even after having several side effects chemotherapy is suggested as most suitable treatment to reduce symptoms of most type of cancer because it involves the introduction of drugs into the blood and thus can be targeted to any anatomical location in the body.
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A) Identify and describe the four levels of protein structure.
fgiga [73]
The four levels of protein structure are distinguished from one another by the degree of complexity in the polypeptide chain. A single protein molecule may contain one or more of the protein structure types: primary, secondary, tertiary, and quaternary structure. 1. Primary Structure: describes the unique order in which amino acids are linked together to form a protein.

2. Secondary Structure: refers to the coiling or folding of a polypeptide chain that gives the protein its 3-D shape. There are two types of secondary structures observed in proteins. One type is the alpha (α) helix structure. This structure resembles a coiled spring and is secured by hydrogen bonding in the polypeptide chain. The second type of secondary structure in proteins is the beta (β) pleated sheet. This structure appears to be folded or pleated and is held together by hydrogen bonding between polypeptide units of the folded chain that lie adjacent to one another

3. Tertiary Structure: refers to the comprehensive 3-D structure of the polypeptide chain of a protein.

4. Quaternary Structure: is the structure of a protein macromolecule formed by interactions between multiple polypeptide chains. Each polypeptide chain is referred to as a subunit. Proteins with quaternary structure may consist of more than one of the same type of protein subunit.
6 0
3 years ago
What structure is the functional unit of contraction in a skeletal muscle fiber??
DiKsa [7]
The structure is calcium ions.
5 0
2 years ago
Help please!!! I give Brainliast please help
Simora [160]

Before you tackle this essay, there are two charts attached, which will probably help you a lot more, but I still wanted to provide you with a written portion just in case. Be warned, the essay is pretty large. :) Hope this helps!

Non-living Components

There are subatomic particles like electrons, protons, and neutrons. And we could go at micro nano levels too. But we will start with atoms to explain the hierarchy.

Atoms: it’s the smallest unit of any substance in the entire world. Atom is made of neutrons, protons, and electrons. The number of electrons and protons in an atom decides what kind it is starting with Hydrogen in the periodic table which has only 1 electron and 1 proton

Molecules: it’s a group of atoms which are attracted together to bind together in strong or weak bonds.

Biomolecules: there are specific molecules which are required for living organisms called biomolecules. These help in different metabolic activities happening in a living body. Biomolecules are naturally found in the environment or are synthesized in the body.

Living components

Organelle: these are a specific section in the where biomolecules are used or synthesized. Several biochemical reactions happen in this particular space. Each organelle has its own lipid layered membranes to enclose all the reaction in them.

Cell: cells are the basic unit of life in which each has its own set of organelles in it. All the organelles have their own function and collaborate with each other taking care of the requirements of the cells.

Tissue: Cluster of the same group of cells functioning at its own. Cell to cell interaction can be seen in a tissue.

Organ: Group of tissue which cluster up to become functional and work with specific goal.

Organ systems: the organs connect together to work for a specific goal creating an organ system.

Organism: it’s an independent living system which comprises at least one cell or more.

Population: it’s a cluster of organisms of the same species associated together.

Biocoenosis or Community: 2 or more species assemble in a particular geographical area interacting each other.

Ecosystem: According to a particular environment, a group of organisms collaborate and survive as an ecosystem. This depends on the nonliving environment surrounding the organism.

Biome: it’s a community of ecosystem which survives in common environment. There are 2 major subdivisions for a biome. They are Terrestrial and Marine. But again there are a number of subdivisions for these 2 which include types like Tropical, Tundra, desert, Pelecypod, Coral etc.

Biosphere: biosphere is the collection of all ecosystem. Earth is one biosphere where you can find all the living ecosystem that we know exist.

All the living organisms we find are a small part of this hierarchy. It took a ton of research, which meant a lot of time and work to put forth this organization from a single atom to a biosphere which is the most complicated one. The hierarchy of organizations of life, help us to understand that we humans are not the dominant beings present in this world. This world belongs to much more than we can think of. Also, we need a mutual relationship with each segment of the hierarchical levels.

Here are a few charts/diagrams to help you out.

Hope this helps!


3 0
2 years ago
Which of the following is an example of an animal that might be culled?
Dmitriy789 [7]

Answer:

D. Sami had low birth weight as a lamb but quickly grew into a large sheep.

Explanation:

The Sami lamb is an example of culled because it has the characteristics of quick growth. Culling is the process of separating organisms from a group of same type of organisms due to presence of desired or undesired characteristics. Sami sheep has a unique characteristic of having less weight at time of birth but having quick growth features that make to gain more weight and become large sheep so this sheep is removed from the population for its good traits.

7 0
3 years ago
Where does myosin get the energy to perform a contraction?.
Nonamiya [84]

Answer:

Energy Supply for Muscle Contraction. Energy for the release and movement of the myosin head along the actin filament comes from adenosine triphosphate (ATP). Recall from the sliding filament theory that the actin and myosin chains slide past one another. The binding of ATP allows the myosin heads to detach from actin

Explanation:

8 0
2 years ago
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