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Ipatiy [6.2K]
3 years ago
10

PLEASE HELP!!!! WILL GIVE BRAINLIEST!!!

Biology
1 answer:
OLEGan [10]3 years ago
8 0
I think it’s option number three.
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Although the brain's early development is in large part genetically directed, its structure is continually modified by environme
Leni [432]
"Neuroplasticity", "brain plasticity", or (sometimes) simply "plasticity".
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3 years ago
Plasma membrane of a skeletal muscle fiber - _________Extension of the sarcolemma that dives into the muscle fiber and surrounds
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Answer:

1. Sarcolemma

2. T-Tubule

3. Sarcoplasmic reticulum

4. Terminal Cisternae

5. Myofibrils

6. Myofilament

7.Thick filament

8. Thin filament

Explanation:

These are all parts of the skeletal muscle and they are all involved in the contraction of your muslces.

The sacrolemma is also known as the myolemma. It is a specialized plasma membrane of the skeletal muscle cell. It is an excitable membrane that shares similarities to the cell membrane of a neuron cell.

The T-tubule extends from the sarcolemma to the sarcoplasmic reticulum (SR). This is the smooth endoplasmic reticulum of the muscle cell. When the sarcolemma gets excited, it triggers the SR to release the calcium ions stored in it. The release of Calcium ions triggers the contraction of myofilaments.

There are two types of myofilaments, the thick myofilament and the thin myofilament. These myofilaments contain contractile proteins, actin and myosin. Thick myofilaments contain myosin where one thick myofilament contains 300 myosin molecules. Thin myofilaments contain contractile and regulatory proteins. These myofilamens make up myofibrils.  

6 0
3 years ago
When a neural impulse reaches the end of an axon, it causes the tiny oval sacs at the end of the axon to release chemicals calle
evablogger [386]

Answer:

When a neural impulse reaches the end of an axon, it causes the tiny oval sacs at the end of the axon to release chemicals called neurotransmitter.

3 0
2 years ago
Use the principle of original horizontality to identify the two rocks that are nearly the same age.
Digiron [165]

The correct answer is - C and D.

The principle of original horizontality means that the rock layers have been order by age, with the layers at the top being the youngest, while the layers at the bottom being the oldest.

In this picture it is little hard to tell which rocks belong to the same layer from first look because there are multiple twists and turns, an uneven surface, caused by pressure on the crust.

By carefully examining the image though, we can trace the layers more properly and see which ones are younger, which older, and which have the same relative age. In this case, we can see that the markings C and D are actually on the same layer of rocks, thus being a good indication that they have the same relative age.

4 0
3 years ago
Why must cells be able to both transcribe and replicate their DNA? (2 points)
Artemon [7]

Answer: The correct answer is D) Replication creates new DNA while transcription creates mRNA.

Replication is a genetic process in which DNA ( deoxyribonucleic acid) is duplicated so that two copies of the genetic material is prepared. This is important for cell division.

Transcription is a process, which includes copying of the genetic formation from DNA into mRNA ( messenger RNA). This provides instructions for the synthesis of specific proteins.

Thus, the correct option is D)

8 0
3 years ago
Read 2 more answers
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