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aleksandr82 [10.1K]
3 years ago
14

Cells that engulf and destroy bacteria

Biology
1 answer:
Fofino [41]3 years ago
5 0

Answer: Phagocytic cells

Explanation:

cells that engulf, ingest, and destroy foreign bodies or toxins-innate.  (all types of cells that engulf and destroy bacteria)

Recognize Invaders - Kill pathogens & infected cells

White Blood Cells - engulf foreign cells or pieces of dead body cells by phagocytosis (cellular "eating").

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Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. what is the likely stimuli
o-na [289]

Answer:

Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. The likely stimulis for this behavioral response are relative humidity & temperature. Since the nematode breathes via the skin, the mucus coating may become dry & the organism would die if exposed to extreme cold & dryness.

Explanation:

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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
If all other aspects of their lifestyles were equivalent, a vegetarian would have a smaller ecological footprint than someone wh
iogann1982 [59]
The answer u r looking for is- True. Hope I’ve helped ;)
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2 years ago
Why can't most plants grow in dark places?
likoan [24]

Answer:

Most plant can't grow in darkness because they need energy from light to carry out photosynthesis

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2 years ago
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