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lys-0071 [83]
3 years ago
6

Define element and explain element

Biology
1 answer:
tamaranim1 [39]3 years ago
8 0

Explanation:

  • An element is a material that consists of a single type of atom.
  • Each atom type contains the same number of protons.
  • Chemical bonds link elements together to form more complex molecules called compounds.
  • A compound consists of two or more types of elements held together by covalent or ionic bonds.

hope it helpful

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2. What do you notice about the cellular respiration and<br> photosynthesis equations?
ryzh [129]

Answer:

Photosynthesis and cellular respiration are connected through an important relationship. ... Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O

Explanation:

8 0
3 years ago
Why is the human heart cooled for surgery?
Natalka [10]

Answer:

By cooling the heart, its need for oxygen is reduced. This allows surgeons to work on the heart for two to four hours without damaging the heart tissue.

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Degeneration of the dopamine-releasing neurons of the ________ is the ultimate cause of Parkinson's disease. Degeneration of the
slavikrds [6]

Answer:

a. substantia nigra

b. substantia nigra (it is repeated)

Explanation:

Parkinson's disease is a neurodegenerative disease that is caused by the death of neurons that release the neurotransmitter dopamine in the <u>substantia nigra</u>, or locus niger, -a region of the brain that regulates brain circuits that give the 'orders' to initiate voluntary movements- .

The lack of this neurotransmitter leads to the occurrence of the main symptoms suffered by patients: decreased movements, muscle stiffness, postural instability and tremor. These failures are generated by the abnormal way in which neurons work in the absence of dopamine through a mechanism that is not known in depth.

It is the second most frequent neurodegenerative disease, after Alzheimer's disease, with a prevalence of 2% in people over 65 years. The characteristic symptoms of stiffness, bradykinesia and tremor are associated with losses of neurons in the substantia nigra and dopamine depletion in the striatum. There are large cytoplasmic inclusions, called Lewy bodies, which are the pathological mark of the disease and appear predominantly in neurons that contain melanin of the nigra substance. Genetic studies in a subgroup of families with Parkinson's disease with autosomal dominant inheritance found a locus on chromosome 4q-21 23 and a mutation in the gene that encodes a synaptic protein, α-synuclein.

7 0
3 years ago
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zvonat [6]

Answer:

<em>T</em><em>he cytoskeleton</em>

<em>The cytoskeleton functions to create a network organizing the cell components and to also maintain the cell shape. It also provided a uniform movement of the cell and its organelles, by the filament system network found in the cell's cytoplasm</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

3 0
3 years ago
What are the two<br> processes in which<br> almospheric oxygen<br> is absorbed?
nikitadnepr [17]

Answer:

respiration and decomposition

Explanation:

Respiration is when animals breathe in oxygen and use it to produce energy, releasing carbon dioxide and water as by-products. In simpler terms, it is the act of breathing.

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3 years ago
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