A group of unicellular organisms that live together but have on relationship to one another

What Is An Example Ecosystem Of Fungi?

hodyreva [135]

Any area in a damp or closed surface.

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3 years ago

How did it get away with flint's water crisis

makvit [3.9K]

I did this on a test

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3 years ago

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Richard is an avid gardener who spends a lot of time caring for the plants in his garden. to minimize damage from pests from his

timama [110]

This is an example of; evolution

Evolution is a gradual process in which the characteristics of a species are changed in response to its environment over several generations. Evolution depends on the process of natural selection. Some of the changed characteristics (traits) may be beneficial to the organism and it can be transferred to their offspring.

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3 years ago

You measure levels of Ca2+ in various locations within a motor neuron and a skeletal muscle fiber when the motor neuron is NOT d

gogolik [260]

Answer:

The correct answer is 3: "High levels of Ca2+ are expected to be found within the sarcoplasmic reticulum".

Explanation:

Muscular contraction is a highly regulated process that depends on free calcium concentration in the cytoplasm. Amounts of cytoplasmic calcium are regulated by sarcoplasmic reticulum that functions as a storage of the ion.

When a nerve impulse reaches the membrane of a muscle fiber, through acetylcholine release, the membrane depolarizes producing the entrance of calcium from extracellular space. The impulse is transmitted along the membrane to the sarcoplasmic reticulum, from where calcium is released. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. The calcium channel in the sarcoplasmic reticulum controls the ion release, that activates and regulates muscle contraction, by increasing its cytoplasmic levels. When calcium binds to the troponin C, the troponin T alters the tropomyosin by moving it and then unblocks the binding sites, making possible the formation of cross-bridges between actin and myosin filaments. When myosin binds to the uncovered actin-binding sites, ATP is transformed into ADP and inorganic phosphate.

Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.

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3 years ago

Which of the following best describes the hydrolysis of carbohydrates? a.The removal of a water molecule breaks bonds between su

In-s [12.5K]

Answer:

c.The addition of a water molecule breaks a bond between sugar mono-mers.

Explanation:

Hydrolysis refers to reaction with water. When water molecules are added to carbohydrates, the bonds between the sugar monomers are broken. This is the chemical reaction known as hydrolysis reaction.

Generally, since carbohydrates are polymers we can say that hydrolysis reactions result in the breakdown of carbohydrate polymers into sugar monomers by using water molecules

5 0

3 years ago