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netineya [11]
3 years ago
8

What makes an immune deficiency disorder so dangerous?

Biology
2 answers:
ankoles [38]3 years ago
8 0

Answer:

it makes it so dangerous because if you get sick you could die

Explanation:

igomit [66]3 years ago
4 0
In an Immune disorder, our own defensive cells, get affected. In that situation, they harm us instead of protect us from any other foreign substance (pathogen), that's why it is so dangerous.

Hope this helps!
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What best explains why the moon's surface gravity is only one-sixth of Earth's surface gravity?
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I pretty sure it is because the earth is bigger than the moon 
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3 years ago
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Many communities in Virginia benefit from watershed protection programs.
RUDIKE [14]

Answer:2. Flooding and 4 run off

Explanation:Watershed areas are prone to flooding. They also cause a lot of runoff

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The cell cycle is the regular sequence of growth and division that cells undergo.<br> True or false?
SVETLANKA909090 [29]

Answer:

True

Explanation:

The regular sequence of growth and division that cells undergo is known as the cell cycle. During the cell cycle, a cell grows, prepares for division, and divides into two new cells, which are called “daughter cells.” Each of the daughter cells then begins the cell cycle again.

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Answer:

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6 0
3 years ago
You measure levels of Ca2+ in various locations within a motor neuron and a skeletal muscle fiber when the motor neuron is NOT d
gogolik [260]

Answer:

The correct answer is 3: "<em>High levels of Ca2+ are expected to be found </em><em>within the sarcoplasmic reticulum</em>".

Explanation:

Muscular contraction is a highly regulated process that depends on free calcium concentration in the cytoplasm. Amounts of cytoplasmic calcium are regulated by <u>sarcoplasmic reticulum</u> that functions as a storage of the ion.

When a nerve impulse reaches the membrane of a muscle fiber, through acetylcholine release,  the membrane depolarizes producing the entrance of calcium from <u>extracellular space</u>. The impulse is transmitted along the membrane to the sarcoplasmic reticulum, from where calcium is released.  At this point, <em>tropomyosin is obstructing binding sites for myosin on the thin filament</em>. The calcium channel in the sarcoplasmic reticulum controls the ion release, that activates and regulates muscle contraction, by increasing its cytoplasmic levels. When <em>calcium binds to the troponin C</em>, <em>the troponin T alters the tropomyosin by moving it and then unblocks the binding sites,</em> making possible the formation of <em>cross-bridges between actin and myosin filaments.</em> When myosin binds to the uncovered actin-binding sites, ATP is transformed into ADP and inorganic phosphate.

Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.

4 0
3 years ago
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