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BabaBlast [244]
3 years ago
8

Difference between extrafusal and intrafusal muscle fibers

Biology
1 answer:
Aleonysh [2.5K]3 years ago
5 0
Extrafusal muscle fibers are the skeletal standard muscle fibers that are innervated by alpha motor neurons and generate tension by contracting, thereby allowing for skeletal movement. They make up the large mass of skeletal muscle tissue and are attached to bone by fibrous tissue extensions (tendons). whereas Intrafusal muscle fibers are skeletal muscle fibers that serve as specialized sensory organs (proprioceptors) that detect the amount and rate of change in length of a muscle.
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9. Write an mRNA strand that is complementary to the DNA strand AATTGC. Circle a codon.
andrew-mc [135]

Answer:

UUAACG

Explanation:

The complementary strand of the DNA strand AATTGC would be UUAACG.

The complementary nucleotide for Guanine [G] will be Cytosine [C] and applies to both DNA and RNA. But the complementary nucleotide for Adenine [A] will be Thymine [T] in DNA and Uracil [U] in RNA.

A codon is a triplet of nucleotides, so it could be any three nucleotides in the strand. Example: AAT, ATT, TTG or TGC.

3 0
3 years ago
Which statement is true of jet streams?
maw [93]

D

The largest contrast in temperatures between cells, which forms jet streams, occurs between the Ferrel and Polar cells, and especially during Winter. This forms a strong polar jet stream with high-speed that can exceed 120 km/h.

Explanation:

There are usually 3 circulating air masses from the equator to the poles on either hemisphere. These cells are called the Hadley, Ferrel and Polar cells. The polar jet stream occurs between the Ferrel and Polar cells while the subtropic jet stream occurs between the Ferrel and Polar cells. These jet streams occur due to the temperature difference between the air masses of the cells.

These jet streams are high altitude narrowing blowing winds. They occur in the tropopause and blow at speed of 120 to 250 mph.

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brainly.com/question/3142066

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3 0
4 years ago
Read 2 more answers
Two proteins bind to the same ligand, and protein A has half of its binding sites occupied when the ligand concentration is 0.5
liq [111]
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in 2002, the fossil of a four- winged dinosaur was discovered in china and named a microraptor. what was the significance of the
zimovet [89]
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Microraptor was a four-winged dinosaur, that lived about 120 million years ago. It is suggested that it was able to fly using all for limbs. It also had feathers, which suppose the connection between birds and dinosaurs. But, its feathers are used for gliding and not for flying. This suggests that flight evolved in the trees and not on the land.
7 0
3 years ago
Study these images.
Eva8 [605]

Answer:

2: A tall, fluffy cloud shaped like an anvil

Explanation:

These clouds are usally large and fluffy with a smoothed over top.

5 0
3 years ago
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