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2 years ago

Why are enzymes necessary?

2 answers:

6 0

Without enzymes, proteins that control the speed of chemical reactions in your body would take place too slowly to keep you alive. For example, the enzymes in your gut break down large molecules into smaller ones.

ddd [48]2 years ago

5 0

to act as a catalyst in chemical reactions

This is the answer because an enzyme speeds up the rate of the reaction, as a catalyst also does this job.

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Filip, aged 64, was recently diagnosed with Alzheimer's. His medical reports will most likely reveal a diminished production of

UNO [17]

Answer:

Filip's medical report, diagnosed with Alzhaimer's, may reveal a diminished production of acethylcholine.

Explanation:

Alzhaimer's disease is a neurodegenerative condition that causes immediate memory loss, behavioral changes and cognitive impairment, due to neuronal alterations and atrophy.

The neurotransmitter acetylcholine —related to neuronal transmission and body movement— may experience a decrease in its production leading to Alzheimer's, according to the cholinergic hypothesis.

Many therapies and treatments at present are based on the use of drugs to correct the acetylcholine deficit.

Regarding other options:

Dopamine: alteration or deficit is related to Parkinson's disease.
Gamma aminobutyric acid (GABA): deficiency is not common and is related to a type of congenital and infantile neuropathy.
Serotonin: deficit of this neurotransmitter can lead to depression and psychological disorders.

3 0

3 years ago

I’m not sure what it means for the cell membrane to be semi-permeable

Lesechka [4]

Answer:

It means that the cell membrane allows certain substances to pass through and not others. As the cell membrane consists of a phospholipid bilayer with a hydrophobic core, only small uncharged hydrophobic molecules can pass through the cell membrane e.g. glucocorticoid and other larger charged particles require transporters or channel proteins to pass through the cell membrane, e.g. glucose.

8 0

3 years ago

If a cell of an organism contains a nucleus, the organism is a

asambeis [7]

Eukaryota i think this is the right answer

5 0

3 years ago

Read 2 more answers

What was the first species in a area

Lemur [1.5K]

Attach image to describe better

3 0

2 years ago

Jim does research in Antarctica. He frequently endures extremely low temperatures. Explain how his skin, muscles, and metabolism

kotegsom [21]

Answer:

Skin,muscles and metabolism play a significant role in maintaining his body temperature

Explanation:

Role of skin

In cold environment the blood vessels of the skin constrict to prevent the loss or liberation of heat from his(jim) body.

Role of muscles

The one of principle function of muscle is to store glycogen.The stored glycogen of jim"s muscle undergo glycogenolysis to generate heat inside his body.

Role of metabolism

In cold environment the rate of aerobic respiration and other catabolic reactions such as beta oxidation of fatty acid occur to generate energy in form of heat in his body.

7 0

3 years ago