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irga5000 [103]
3 years ago
8

When NAD+ becomes NADH, it is being

Biology
1 answer:
ipn [44]3 years ago
5 0

NAD+ accepts a hydrogen ion (H+) and two electrons (2e−), as it becomes reduced to NADH + H+. The NADH moves to the electron transport chain and donates a pair of electrons (becomes oxidized) to the first compound in the chain.

Explanation:

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Which enzyme(s) involved in fatty acid synthesis utilize ATP? Select all that apply.
GREYUIT [131]

Answer:

a. Acetyl CoA carboxylase  

Explanation:

Much of the fatty acids used by the body is supplied by the diet, excessive amounts of carbohydrates and protein obtained from the diet can be converted to fatty acids and stored as triglycerides. Fatty acid synthesis occurs mainly in the liver and mammary glands, and to a lesser extent in adipose tissue and kidney, the process incorporates acetyl CoA carbons into the forming fatty acid chain using ATP and NADPH.

The acetyl portion of acetyl CoA is transported to cytosol as citrate, produced by condensation of oxaloacetate and acetyl CoA, the first reaction of the citric acid cycle, this occurs when the concentration of mitochondrial citrate is high, observed when there is a high concentration of ATP and isocitrate dehydrogenase is inhibited.  The increase of citrate and ATP favors the synthesis of fatty acids, since this pathway needs both. Acetyl CoA should be converted to malonyl CoA. Carboxylation is catalyzed by acetyl CoA carboxylase and requires ATP, this reaction is the regulated step in fatty acid synthesis: it is inactivated by products, malonyl CoA and palmitoyl CoA, and activated by citrate, another regulatory mechanism is reversible phosphorylation of enzyme, which makes it inactive due to the presence of adrenaline / glucagon

6 0
3 years ago
The ________ is a blind spot on the retina, while the ________ contains only cones and is the retinal area of greatest visual ac
alex41 [277]

Answer:

1. optic disk 2. fovea centralis

Explanation:

5 0
3 years ago
Treatment of epilepsy is directed at thickening the meninges to dampen brain electrical activity. stabilizing overexcited nerve
Nikitich [7]

Treatment of epilepsy is directed at stabilizing overexcited nerve membranes.

<h3><u>Explanation:</u></h3>

Epilepsy is a disease whose cause is unknown, but it occurs as the nerves get too excited in the brain due to some unknown cause, and causes the centers to conduct the nerve impulses restlessly, and gets in a tetani mode, which is epilepsy. The patient presents with idiopathic seizures and that too, aggravated by stress, tension etc.  

Antiepileptic drugs like phenytoin sodium causes the change in sodium channels and pumps which releases the concentration difference on each side of the neural membrane, thereby reducing the potential difference between the two sides. Thereby it stabilizes the nerve membranes.  

3 0
3 years ago
What are the three looped fluid-filled canals in the inner ear that detect the direction of the body's movement?
masya89 [10]

Answer:

The semicircular canals ( vestibular system)

Explanation:

The inner ear of humans is made up of two parts.

  • The cochlea which aid in the hearing process.
  • The vestibular system which aid for balance of the body

The vestibular system comprises of three fluid filled looped canals . The vestibular system comprises of sensory cells which detect even a slight tilting of the head. The fluid filled canals are termed as the semicircular canals. It is due to the vestibular system that we feel a room to bespinning even after we have finished our rotation ride.

4 0
3 years ago
People with enlarged thyroid glands develop a condition called "goiter." this is often visible as:
iren2701 [21]
Swelling around the neck due to deficiency in iodine
8 0
3 years ago
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