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jarptica [38.1K]
3 years ago
13

The first one will be the brainest

Biology
1 answer:
just olya [345]3 years ago
7 0
<h2>Cell Analogy</h2>

Explanation:

  • Nucleus: Parents

As we see that parents control everything in the house. Similarly,the nucleus controls everything in the cell.

  • Cell membrane: Door

A door is analogous to the cell membrane because it allows people come and go. Similarly,the cell membrane in a cell can allow certain things to enter and exit.

  • Cytoplasm: Air

The cytoplasm fills the space in a cell. It is similar to air which is filled everywhere in the house.

  • Nuclear membrane: Security guard

The nucleus in a cell is protected by nuclear membrane. The nuclear membrane is analogous to secuity guard. As people in a house are protected by security guard, similarly nucleus is protected by nuclear membrane.

  • Endoplasmic reticulum: Hall ways

Endoplasmic reticulum transport things to other places in the cell. It is similar to hallways which help us to reach different places in the house.

  • Golgi bodies: Car

The golgi bodies modify,sort and package proteins.

It send them to other parts of the cell when needed.

It is similar to a Car which transports people and can store stuffs.

  • Mitochondria: Stove

The mitochondria in a house is analogous to Stove as it breaks down nutrients and turns them into energy. Similarly, the Stove in our house, cooks foods and it is converted into energy when consumed.

  • Ribosomes: Kitchen

The ribosomes are a cell structure that make protein. It is same as a kitchen in our house where people make food or proteins.

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Captive-bred trout reduce the fitness of wild populations, Relative fitness Wild Captive Captive Wild Wild Captive What statemen
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Answer:

A) The gene flow between hatchery-reared and wild populations is leading to a decline in fitness of wild populations.

Explanation:

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therefore option a answers the question

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3 years ago
Place these events in the correct order of occurrence in the muscle contraction: End plate potential triggers an action potentia
Sunny_sXe [5.5K]

Answer:

1. Acetylcholine binds to receptors on the motor end plate

2. Ligand-gated channels open leading to depolarization

3. End plate potential triggers an action potential  

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5. Calcium is released from the sarcoplasmic reticulum

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Explanation:

Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules​) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.

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