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3 years ago

Secretions of the pituitary gland are most directly regulated by the

Biology

1 answer:

erik [133]3 years ago

3 0

The hypothalamus.

The hypothalamus is the link between the nervous system and the endocrine system. It synthesizes and secretes hypothalamic hormones. These hormones will either stimulate or inhibit the pituitary gland, which releases hormones that go throughout the body to the glands and organs.

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if sodium and chloride ions from Salt enter a fish with no energy spent, what type of transport is this an example of?

Verdich [7]

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Passive transport: Movement of materials across a membrane that does not require energy from the cell. Movement of material against the concentration gradient (from high concentration to low concentration)

Hope this helps!

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Answer for number 22 ?

anzhelika [568]

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Marizza181 [45]

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

$2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)$

$\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]$

= $2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]$

$= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]$

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

In this question, the enthalpy of formation has positive value and hence the reaction is endothermic in which the heat is released.

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3 years ago

What are the elements in LIAISI206

Levart [38]

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Explanation:

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