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ololo11 [35]
3 years ago
13

Consuela stands in front of her American History class to give a presentation. She suddenly loses consciousness and suffers a ""

sleep attack"" referred to as ____.
Biology
1 answer:
densk [106]3 years ago
3 0

Answer:

The options

A. dyspnea

B. Ataxia

C. cataplexy

D. narcolepsy

Our ANSWER IS D.

D. narcolepsy

Explanation:

It is a chronic sleep disorder which leads to excessive daylight drowsiness.

It may be due to a genetic factor and unusual signal being released in the brain as a result of absence of the brain chemical called hypocretin/orexin, which controls sleep. It is often seen as the effect of the immune system erroneously working against the production of hypocretin in thr brain.

It results in unexpected attacks of sleep, abrupt loss of muscle tone and hallucinations.

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True or false: most flowers have a trunk
Ahat [919]

Answer:

Showy orange flowers that develop on the main trunk and limbs. Halleria lucida, a shrub from South Africa, is in the family Scrophulariaceae. So this statement would be true.

8 0
2 years ago
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mrs_skeptik [129]
2nd one is the right answer
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If a circle has a diameter of 16 feet, which expression gives its area in square
bagirrra123 [75]

Answer:

The options are unclear but the answer is 8^2π square feet or 64π sqfeet

Explanation:

Area of a circle is denoted by: πr^2 where r is the radius of the circle.

In this question, the diameter was given. The diameter of a circle is twice the radius. Therefore, in order to get the radius, we divide the diameter by 2 i.e. r = d/2

= 16/2 = 8 feet.

Thus, the radius = 8 feet.

Hence, Area of a circle = πr^2

= π × 8^2

= 64π or 8^2π sqfeet.

6 0
3 years ago
Positive selection tests to see if the ______ of a T-lymphocyte can recognize and bind to an MHC molecule.
DENIUS [597]

Positive selection tests to see if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

<h3>What is a T-lymphocyte?</h3>

A T-lymphocyte is a special type of immune cell that is generated inside the bone marrow.

The T-cell receptor (abbreviated as TCR) is a protein located on these immune T lymphocytes.

In conclusion, Positive selection identifies if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

Learn more about T-lymphocytes here:

brainly.com/question/17025187

#SPJ1

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