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SVETLANKA909090 [29]
3 years ago
8

Which organism has cells that work together to form tissues, tissues that combine to form organs, and organs that work together

in organ systems?
A.)Panda
B.)Amoeba
C.)Bacterium
D.)Paramecium
Biology
2 answers:
Debora [2.8K]3 years ago
4 0
The answer you're looking for is Panda because a panda has an organ system, the other choices are all microscopic organisms so they don't have an organ system

Hope this helped you out :)
Reil [10]3 years ago
4 0
The answer you’re looking for is A
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muminat
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Explique a frase:"O citosol é um coloide e o movimento das celulas está associado ao citoesqueleto presente nesse meio."
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8 0
3 years ago
I need to know the hypothesized enzyme
worty [1.4K]

Answer:

Hypotheis:

<em>If high amounts of product in the samples, '+++' , correlates with optimal temperatures and pH for enzyme activity, then...</em>

  • <u>A- Pepsin</u>
  • <u>B- Amylase </u>
  • <u> C- thermophilic enzyme</u>

Explanation:

Enzymes are specialized proteins that function as biological catalysts- <u>they speed up chemical reactions.</u> As proteins, these are susceptible to changes in temperature and pH- they function best at optimal values for both conditions, but can be denatured, rendering them inactive at relative extremes.

Each enzyme provided has its own optimal temperature and pH values.

  • Thermophilic enzymes are usually found in regions characterized by high temperatures. They show high thermostability, and do not become denatured at high temperatures- they thrive, and do not function well at lower temperatures.
  • Amylase is a hydrolase digestive enzyme found in the mouth, that acts on polysaccharides like starch to break 1,4  glycosidic bonds between glucose molecules. It works best at a physiological (neutral) pH and temperatures (around 37°)
  • Pepsin, another digestive enzyme, is a peptidase that breaks down proteins into peptide molecules. It is found in the stomach lining, where the pH  is typically low i.e. acidic due to the hydrochloric acid in digestive juices.

Thus from the table A- pepsin, B- Amylase and C- thermophilic enzyme can be hypothesized.

6 0
3 years ago
Computer enhanced x-rays are called____ scans
jeka57 [31]
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6 0
3 years ago
Action potentials (nerve impulses) are changes in the membrane potential that, once started, will affect the entire excitable me
stich3 [128]

Answer:

The order of events would be:

4.Threshold stimulus, Na+ channels open.  This is the first event

5.Na+ influx, Depolarization. Second event

2.Na+ channels close, K+ channels open.  This is the third event

1.K+ efflux, Repolarization.  Fourth event

3.Hyperpolarization, K+ channels close

Explanation:

In resting state, the membrane is negative inside, and  K+ concentration is higher than outside.   Na+ concentration is higher outside instead.  

Sodium influx is responsible for membrane depolarization.  It's the event to produce the action potential.  When sodium channels are closing, potassium channels open and K+ go outside until repolarization occurs. But now we have both ions in different sides of the membrane, and this can't be stimulated again to produce other action potential. The membrane will remain refractory to respond to the adequate stimulus until ions migrate to their original sites.  This is Na+ outside, and K+ inside.  This is responsibility of the Na+/ K+ pump, that uses ATP to pump Na+ out, and  K+ in. Once both ions had been relocated in the membrane, this is ready to receive a correct stimulus to produce a new action potential.

6 0
3 years ago
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