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nevsk [136]
3 years ago
5

Why do cells need to be able to transport things across their membranes

Biology
1 answer:
Annette [7]3 years ago
6 0

Answer:

Cell membranes are selectively permeable which means it allow certain molecules to move across it into and out of the cell. Cells need to be able to transport these substances to live and grow.

Transport of ions, water maintains the osmotic pressure of the cell. Transport of sugars like glucose is necessary to generate energy for the metabolic activities of the cell. Gases like CO2 are waste products of metabolic reaction which are removed by the cell through the cell membrane. Amino acids are required to make proteins.  

Transport across cell can occur through active and passive transport and transport of these substance are necessary for a cell to live and function properly.

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after a power stroke, the myosin head must detach from acting before another powerstroke can occur. what causes
kompoz [17]

The myosin head separates from actin as a result of ATP binding. The intrinsic ATPase activity of myosin then transforms ATP into ADP and Pi. The myosin head's angle is altered into a cocked state by the energy generated during ATP hydrolysis. The myosin head is now ready to move in the future.

The myosin protein is in a high-energy conformation when the head is cocked. At the end of the power stroke, the myosin head is in a low-energy position because this energy has been used up during the power stroke. ADP is released following the power stroke, but the cross-bridge is still there and actin and myosin are joined together.

Since ATP is readily available, the cross-bridge cycle can repeat, and muscular contraction can go on as long as ATP is there.

to know more about ATP hydrolysis visit

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6 0
1 year ago
What impact does sunlight have on the marine environment?
Stels [109]
The answer to this is C because when the sun shines on the water it tends to heat up because water is like a mirror it reflects the light of it but in doing so it is heating up the water making the water really hot.
4 0
4 years ago
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1: _____ chromosomes are found in body cell but not sex cells.
pantera1 [17]

Answer:

1. homologous.

2. Meiosis

3. Human sex cells do have 23 chromosomes, but not these 23. ... None, egg cells don't have chromosomes. No, sex cells do have chromosomes. Meiosis reduces chromosome number so that sex cells (eggs and sperm) have a half set of chromosomes one homolog of each pair. This is the haploid number.

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Alex Ar [27]

Answer:

meiosis 1, anaphase

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