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IrinaVladis [17]
3 years ago
6

The parents of a school-age child with asthma express concern about letting the child participate in sports. what should the nur

se tell the parents about the relationship between exercise and asthma?
Biology
1 answer:
Sedaia [141]3 years ago
3 0
Exercise can often trigger asthma so it's important to have an inhaler available. Although sports isn't always recommended for a child with asthma. 
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Which one of the following accurately describes the Lac operon?
andre [41]

The lac operon, which stands for Lactose operon is known as an inducible system. It is the an operon required for the transport and metabolism of lactose some enteric bacteria (Echerichia coli for example). The Lac operon is only activated in the presence of a key molecule. The key molecule is lactose.
From the given options the following best describes the Lac operon:

D. The repressor is freed from the operator when lactose is present.

5 0
3 years ago
Select the structures and functions of the large intestine from the choices below
grin007 [14]

Answer:

Structure of large intestine: Large intestine is the part of digestive system which comes in the end. It consist of four parts. Large intestine length is 150 cm and width is 5 cm.

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Marine organisms that are euryhaline would most likely be found in which environment?
finlep [7]

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Explanation:

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The coastal estuary is one of the habitat of such animals. The green crab, molly fish are some example of the animals found in this environment.

Some of the euryhaline animals are also found in the salt and brackish water, fresh water, moderately haline et cetera.

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Brass gets discoloured in air because of the presence of which of the following gases in air?
leonid [27]
B. Hydrogen sulphide
4 0
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What second messenger most directly causes calcium ions to be released from intracellular stores?
NemiM [27]

Answer: adenylyl cyclase inositol triphosphate mainly known as IP3 causes the release of Calcium ions directly from the inracellular stores and causea contraction.

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IP3, inositol phosphate is a second messenger a signaling molecule. It is made by hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2), a phospholipid that is located in the plasma membrane, by an enzyme phospholipase C.

IP3 binds to the calcium channels and opens Ca2+ channels that are embedded in the ER membrane, releasing Ca2+ into the cytosol. Calcium ions released may cause contraction and regulate the Ca2+ channels in the membranes.

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3 years ago
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