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Helen [10]
3 years ago
9

What hormone functions both as a flight or fight response and as a neruotransmitter, sending messages from one neuron to the oth

er?
Biology
1 answer:
zimovet [89]3 years ago
7 0

the hormone that functions both as a fight or flight response and a neurotransmitter is epinephrine

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Why is it useful for an ecologist to identify the keystone species of an ecosystem?
RideAnS [48]

It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.

6 0
3 years ago
A transmembrane protein has the following properties: it has two binding sites, one for solute A and one for solute B. The prote
Usimov [2.4K]

Answer:

The protein is a symport protein.

Explanation:

Transport proteins are proteins which are involved in the transport of solutes across the cell membrane. The binding of the solute to be transported across the membrane causes a conformational change in the shape of the protein, thereby moving the molecule to the side of nthe membrane it is to be transported. The difference in the concentration of the solute across the membrane known as concentration gradient is mainly responsible for the transport of molecules by the transport proteins.

There are three types of transport proteins: uniport, symport and antiport transport proteins.

Uniporters are involved in moving only one molecule across a membrane

Symporters are involved in moving two or more molecule across a membrane in the same direction.

Antiporters are involved in moving two or more molecule across a membrane in opposite directions.

From the description of the transport protein in the question, both solutes A and B are moved across the membrane simultaneously in the same direction. Therefore, the protein is a symport protein.

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3 years ago
A cyclist starts a race. As she pedals, she begins to breath faster. Why? plz answer fast!!!
Advocard [28]

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The primary syllable it goes like ha-lu-ci-na-tion. na is the primary syllable.
The secondary syllable is ha-lu-ci-na-tion where the secondary syllable is lu.
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a dream is one its synonym with one syllable.
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3 years ago
What in the human brain do addictive substances like nicotine react with?
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4 0
3 years ago
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