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Romashka [77]
3 years ago
13

Which movement of substances through a cell membrane against a concentration gradient requires energy?

Biology
1 answer:
raketka [301]3 years ago
6 0
The answer to this is active transport. 

This is a kind of movement of substances. Unlike diffusion or osmosis, the substances move against the concentration gradient (ie. from low concentration to high concentration). This process requires extra energy generated such as from cellular respiration. 

In addition, this process also requires a carrier protein, where it'll pick up certain substances that are needed to transport and move it to the other side. Some examples of movements of active transports are such as root hair cells of plants picking up minerals, or our small intestine absorbing nutrients digested.
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Answer:

Is composed of trabeculae that are oriented along lines of stress. (Ans. D)

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Spongy bones are also known as trabecular and cancellous bones. It is covered by compact bones and present in the long bones. They are known as spongy because they are highly vascular and porous tissues.

Osteoblast thin area creating the turbeculae space between the tissues. Spongy bones are also known for home of hematopoietic stem cells and bone marrow, which are helping to differentiate white blood cells, red blood cells, and platelets.

Some difference between spongy bone and compact bone are:

1) Spongy bones are light weight and compact bones are heavy.

2) Spongy bones are composed of trabeculae and compact bones are composed of osteons.

3) Spongy bones are known as cancellous and compact bones are known as cortical bones.

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✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

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