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alexdok [17]
2 years ago
5

Which definition is the best for “semipermeable membrane”?

Biology
1 answer:
kirza4 [7]2 years ago
5 0

Answer:

Semipermeable membrane is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by osmosis—or occasionally by more specialized processes of facilitated diffusion, passive transport or active transport

Explanation:

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How are consumers classified into different groups?
galina1969 [7]
Consumers are usually animals. Consumers cannot make their own food, so they have to eat other organisms. They can be classified into three main groups. These groups are herbivores, carnivores and omnivores.
3 0
3 years ago
What structural component gives arteries the ability to passively adapt to changes in blood pressures that accompany the heartbe
Andrews [41]

Answer: elastic fibers

Explanation:

Elastic fibres are the essential durable component present in mammalian connective tissueand functions to provide proper pulmonary,  cardiovascular and intestinal system structure and function. Their structural function is to provide elastic recoil and resilience for the tissues.

Elastin fibers ahve two main including microfibrils and elastin containing fibrillin play a mechanical and structural role in the arteries, and their important function is to provide the tissues with resilience and elasticity.

Hence, elastic fibers helps arteries to adapt to changes in blood pressures that accompany the heartbeat.

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3 years ago
How are scientific theories formed?
almond37 [142]
Through a series of tests and data
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3 years ago
What does nucles do as a function in a cell?
Jet001 [13]
Nucleus has genetic material (DNA) inside it, so it commands the cell about how it has to be function......
4 0
2 years ago
Caffeine aids in the movement of calcium ions across cell membranes by both making it easier for the Ca2+ channels to open and b
Llana [10]

Caffeine cause dose dependent prominent increase in force of contraction and period of contraction of muscle

<u>Explanation:</u>

Caffeine is widely used in foods and drinks. Its long time use can effect central nervous system include lethargy memory, sleep disorder and anxiety.

Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.  However latent period and relaxation period are unaffected by caffeine. Increase in concentration of calcium ion will result increase number of power stroke and force for contraction.

Because of calcium ion release in skeletal muscle, caffeine causes peripheral manifestation such as hyper-reflexia, muscle twitching etc.

High amount of caffeine leads to increase in release of Ca2+ from sarcoplasmic reticulum. It increases tension development in single tetanic contraction and re-initiate maximum tension in fatigue single myofibre by restoring Ca2+ release from sarcoplasmic reticulum to non-fatigued levels.

8 0
3 years ago
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