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Nady [450]
3 years ago
7

Compare and contrast the three main types of muscle tissue.

Biology
1 answer:
kogti [31]3 years ago
4 0
Cardiac muscle tissues are in the walls of the heart, striated and have involuntary control. Skeletal muscles tissue is in all muscle that are connected to the bones of the skeleton, these are under voluntary control. Smooth muscle tissue are in hollow organs beside the heart and are spindle shaped. 
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What are the two different results of a lack of calcium and a lack of atp?
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Muscle cells contract by interactions of myosin heads on thick filament with actin monomers on thin filament. The myosin heads bind tightly to actin monomers until ATP binds to the myosin. This causes the release of the myosin head, which subsequently swings foward and associates with an actin monomer further up the thin filament. Hydrolysis and of ATP and the release of ADP and a phosphate allows the mysosin head to pull the thick filament up the thin filament. There are roughly 500 myosin heads on each thick filament and when they repeatedly move up the thin filament, the muscle contracts. There are many regulatory proteins of this contraction. For example, troponin I, troponin C, and tropomyosin form a regulatory switch that blocks myosin heads from binding to actin monomers until a nerve impulse stimulates an influx of calcium. This causes the switch to allow the myosin to bind to the actin and allows the muscle to contract. </span><span>
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6 0
3 years ago
Mastication is an example of the _______ digestion of food.<br><br> physical<br> chemical
sineoko [7]
Mastication is just a fancy way to say chewing. Since nothing chemical is going on and the food is just being chewed, the answer is physical.
6 0
3 years ago
what is the correct sequence for the events of mitosis, meiosis, fertilization, and birth in sexual reproduction?
notka56 [123]
Fertilization, mitosis, meiosis, birth
5 0
3 years ago
Consider the abbreviated model of meiosis and the four gametes produced at the completion of meiosis II. Imagine that these game
den301095 [7]

The right answer is A) Trisomy

Aberrant karyotypes containing an abnormal number of chromosomes are known in the human species. The best-known (and most common) chromosomal abnormality is trisomy 21, which is responsible for Down syndrome (mongolism). There are others such as Turner syndrome (woman with a single X chromosome) or Klinefelter syndrome (man XXY).


These abnormalities originate from the non-disjunction of the chromosomes of a pair of homologues during metaphase I of meiosis. At the end of division I, a daughter cell contains the two chromosomes of the pair considered and the other cell does not contain a chromosome of this pair. A similar result can be obtained during a bad distribution of chromatids during anaphase II.


After fertilization from a gamete of this type, a trisomy or a monosomy is obtained.

4 0
3 years ago
Read 2 more answers
Integral proteins are important to maintain the strength of the cell membrane. true of false?
Gelneren [198K]

Answer:

false

Explanation:

7 0
3 years ago
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