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Maurinko [17]
4 years ago
15

The contractile unit in the muscle cell is called the

Biology
1 answer:
Debora [2.8K]4 years ago
4 0

Answer:

c. Sarcomere

Explanation:

Sarcomere is one of the basic components of striated muscle that allows muscle contraction. That is, it is the contractile unit in the muscle cell.

The sarcomere is made up of a protein complex, the most important of which are actin and myosin. In the presence of Ca2 +, the ends of the myosin bind to nearby actin molecules and fold with great velocity. The actin filament then moves to the center of the sarcomere, triggering the approach of the two Z lines. This causes the sarcomere to shrink and, to a large extent, lead to contraction of the entire muscle.

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Which organs send chemicals to the small intestine to help digest food?.
UkoKoshka [18]

Answer:

pancreas

Explanation:

Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins. The pancreas delivers the digestive juice to the small intestine through small tubes called ducts. Liver. Your liver makes a digestive juice called bile that helps digest fats and some vitamins.

7 0
2 years ago
What best describes stem cells
denis23 [38]
A stem cell is a cell that has layers of bacteria that helps protect the water that follows through it.
7 0
3 years ago
Read 2 more answers
1) How is DNA condensed to form a chromosome?
frosja888 [35]

Answer:

Hello! Here are the answers:

  1. Chromosomes are a highly condensed form of a combination of DNA and protein called chromatin. DNA strands (negatively charged) are tightly wound around these proteins called histones (positively charged) to form chromosomes.
  2. Mechanism genes code for for proteins that govern life processes. These genes or portions of DNA  are called exons. DNA segments between these exons are called introns that strictly code for regulatory proteins and also contain genetic regulatory elements (DNA sequences that control gene expression).
  3. Gene expression is the process of translation of DNA sequences into proteins. The genetic code is the nucleotide sequence in the DNA itself that codes for different amino acids that combine together to form a functional protein.

Explanation:

* 2. The intronic regions are misleadingly referred to as "junk DNA" but introns code for crucial regulatory elements that control gene expression.

* 3. The genetic code determines the sequence of amino acids in various proteins.

7 0
4 years ago
sodium, chloride, and potassium in cells and body fluids are examples of: question 54 options: phytates. electrolytes. condensat
Troyanec [42]

(b) electrolytes are what sodium, chloride, and potassium in cells and body fluids are examples of.

When dissolved in water or bodily fluids, a substance called an electrolyte separates into ions (particles having electrical charges). The ions sodium, potassium, calcium, chloride, and phosphate are only a few examples.

The many electrolytes include sodium, calcium, potassium, chloride, phosphate, and magnesium. They come from the meals you consume and the liquids you drink.

Your body's electrolyte levels might get too high or too low. When your body's water balance changes, this may occur. The amount of water you consume and lose should be equal. If something throws off this equilibrium, you can be dehydrated or have too much water on your body (overhydration).

Here is another question with an answer similar to this about electrolytes: brainly.com/question/28699046

#SPJ4

Question correction:

Sodium, chloride, and potassium in cells and body fluids are examples of:

a. phytates.

b. electrolytes.

c. condensates.

d. solvents.

4 0
1 year ago
NEED HELP ASAP WILL GIVE BRAINILIEST THANK YOU
Grace [21]

TCTCG and AGAGC are the perfect pair.

Option A

<h3><u>Explanation:</u></h3>

DNA is the genetic molecule of a living cell. The DNA stores genetic information of the species inside itself by means of particular pattern or sequence of nitrogen bases called as gene. The gene is comprised of the particular sequence of nitrogenous bases which are four in number - adenine, guanine, thymine and cytosine.

The nitrogen bases are present in both the strands of DNA and they have complementary relationship between them. The adenine forms hydrogen bonds with thymine and guanine pairs with cytosine.

Here the sequence of one strand is given as TCTCG. So according to the complementary pairing process, the opposite strand must have the sequence of AGAGC to maintain the structure.

4 0
4 years ago
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