answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Firdavs [7]
1 year ago
15

Cross bridge formation between myosin heads and actin molecules is caused by the elevation of calcium ion concentration in the c

ytosol. During rigor mortis, this elevation of calcium ion concentration in the cytosol is permanent because ________.
Biology
1 answer:
almond37 [142]1 year ago
3 0

Answer:

sarcoplasmic reticulum deteriorates and ATP production is stopped

Explanation:

Rigor mortis is the third stage of death characterized by stiffening of joints and muscles in body. The stiffening occurs because muscles are not able to return to the relaxed state. There are two reasons for rigor mortis, depletion of ATP and increase in calcium concentration in cytosol. Due to these factors the actin-myosin crossbridge is not able to break and the muscles remain in contracted state.

Sarcoplasmic reticulum deteriorates and calcium is released into the cytosol. Sarcolemma ( covering of muscle fiber ) also breaks down releasing extra calcium into the cytosol. Calcium is responsible for formation of actin-myosin cross bridge and when its concentration increases the bridge is formed continuously leading to stiffening of muscles and joints.  

You might be interested in
During the year the beetles reached carrying capacity, a flood in the region decreased the population to about 77 beetles per he
tensa zangetsu [6.8K]

Answer:

After the flood the total number of beetles = number of beetles per hectare × 115 hectares = 8,855 beetles.

The carrying capacity is 14,600 beetles.

Explanation:

8 0
1 year ago
Read 2 more answers
The model below shows the structure of a portion of a plasma membrane in an animal cell. The model shows the structure of a port
Romashka-Z-Leto [24]

Answer:

The amphipathic property of the phospholipids that constitute the membrane

Explanation:

It seems like a options-based answer so it would be better if they were included here but basically, each of those phospholipid molecules has two parts with antagonistic reactions towards water.

The head is polar or hydrophilic, wich means it can be sorrounded by water. The tail, is apolar or hydrophobic which means it is repelled by water.

The interior and exterior of the cell is contain water-based substances, that's why the heads of the phospholipids are oriented like that with the tails protected inside the membrane.

This double layer structure has a fundamental role in the fluid property of the cell membrane from which derive most of it's functions.

3 0
1 year ago
In a two-point test cross, 36 of the offspring were recombinant types. The remaining 64 offspring were parental types. How many
Maksim231197 [3]

Answer:

36

Explanation:

A two-point test-cross is a cross between an individual with a double heterozygote genotype and a homo-zygous recessive individual in order to determine the recombination frequency between two linked genes. In genetics, one map unit (m.u.) can be defined as the measure of the distance (i.e., genetic distance instead of physical distance) between genes for which one (1) product of meiosis in one hundred (100) is recombinant. In this case, 36 of the offspring have the recombinant phenotype, while the remaining 64 offspring are not recombinant, and therefore both genes are separated by 36 mu (64 + 36 = 100 >> 36 mu).

6 0
1 year ago
Select the correct answer. Which of the following is an example of a beneficial mutation? A. a mutation causing uncontrolled cel
emmainna [20.7K]
B. A mutation inhibiting human immunodeficiancy virus from entering the host cell.
Please mark as brainliest.
4 0
2 years ago
Read 2 more answers
Name the three molecules that are illustrated in Model 1.
FromTheMoon [43]

Answer:

Pentanol, glucose and fatty acid.

Explanation:

Pentanol, glucose and fatty acid are the three molecules which are present in  the given model number 1. In the model, there are three different molecular diagrams for each molecule. The first one is ball and stick model, the second one is Lewis structure and the third one is line drawing method. All diagrams for a same molecule is totally different from another.

3 0
2 years ago
Other questions:
  • It can be seen on a cladogram that modern birds and reptiles share a common ancestor. Select the piece of evidence that best sup
    15·2 answers
  • What two organs release secretions into the duodenum of the small intestine:?
    13·1 answer
  • Plant and animals cells are very similar structurally, though some differences do exist. The vacuole is one organelle that diffe
    5·2 answers
  • "crabgrass preventer" is what type of herbicide? css 202
    12·1 answer
  • Zachary's student loans are an example of what type of loan? secured loan unsecured loan mortgage loan auto loan
    11·2 answers
  • Judith is receiving messages in her brain from baroreceptors in her stomach, from chemoreceptors detecting PO2 levels in her blo
    11·1 answer
  • A student notices that when bananas are kept near other fruits, the other fruits ripen faster. She wonders what causes the other
    14·2 answers
  • Watch this video that shows the leaves of a Mimosa pudica plant. What characteristic of life does the video show? Name two examp
    14·2 answers
  • Jackson will be taking his college entrance exam next weekend. Part A Relate each of the following terms to his preparation for
    7·1 answer
  • Which type of cell adhesion is useful for anchoring cells together and defending against shear forces on tissues
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!