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pashok25 [27]
2 years ago
7

Tại sao chúng ta lại bị trụt rút

Biology
1 answer:
cestrela7 [59]2 years ago
3 0

Khi bạn quỳ lâu, đứng lâu sẽ gây ép lên các cơ bắp và mạch máu. Hoặc một tình trạng khác là khi ngủ bạn thường xuyên để cong chân, cơ bắp ở bắp chân khá ngắn, không được duỗi ra, duy trì tư thế này lâu, khi cử động nhẹ bạn sẽ bị chuột rút.

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Someone please help!!LEVELS OF ORGANIZATION Identify each of the following as:
miskamm [114]

Answer:

1 community

2population

3ecosystem

4habitat

Explanation:

the classroom is a community because its people of different cultures and race that come together  and be one

all the mice in the classroom are considered a population because population is the number of people in a certain area

in the third statement there are all forms of organisms hence showing the biodiversity that ecosystems tend to have

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2 years ago
Which of the below would not be considered an advantage of ebusiness?
AlladinOne [14]

because its the power house of the call


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2 years ago
As a molecule moves through the plasma membrane it passes through a hydrophobic layer of phospholipid tails then a hydrophilic l
Firdavs [7]

Answer:

"As a molecule moves through the plasma membrane it passes through <em>a hydrophilic layer of phospholipid heads then a hydrophobic layer of phospholipid tails and then another hydrophilic layer of phospholipid heads".</em>

Explanation:

Biological membranes are formed by two lipidic layers, proteins, and glucans.

Lipids characterize for being amphipathic molecules, which means that they have both a hydrophilic portion and a hydrophobic portion at the same time. These molecules have a lipidic head that corresponds to a negatively charged phosphate group, which is the polar and hydrophilic portion. They also have two lipidic tails that correspond to the hydrocarbon chains -the apolar and hydrophobic portion- of the fatty acids that esterify glycerol.

Membrane lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other, constituting the internal part of the membrane.

Through this lipidic bilayer, some molecules can move from one side of the cell to the other, which happens because of concentration differences. When this occurs, molecules must pass through the hydrophilic layer of phospholipid heads then through the hydrophobic layer of phospholipid tails and then again through another hydrophilic layer of phospholipid heads.              

3 0
3 years ago
6. Phylogenetic trees are used for?
ivolga24 [154]

Phylogenetic trees show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.

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Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractu
IRISSAK [1]

Answer:

A) Calcitonin injection

Explanation:

Parafollicular cells or C-cells of the thyroid gland produce a hormone which is involved in the regulation of calcium levels in the blood. This hormone is Calcitonin. It works in an antagonistic manner with the Parathyroid hormone (PTH). Calcitonin decreases the calcium level in the blood by increasing absorption of calcium ions in bones. In osteoporosis, when the patient is given the injection of hormone calcitonin, it produces and increase in bone mass because it negatively affects the rate of absorption of bone by the osteoclasts.

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