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laila [671]
4 years ago
9

What is the fatty tissue that covers axons and speeds up impulses as they travel from cell to cell?

Biology
1 answer:
sertanlavr [38]4 years ago
8 0

The fatty tissue is called the Myelin sheath. <span>The myelin sheath is a significantly extended and altered plasma membrane wrapped about the nerve axon in a spiral form. The myelin membranes somes from and are a part of the Schwann cells in the peripheral nervous system and the oligodendroglial cells in the central nervous system. Each myelin-spawning cell delivers myelin for only one segment of any given axon. The intermittent interruptions where short portions of the axon are left uncovered by myelin are the nodes of Ranvier, and they are critical to the functioning of myelin.</span>

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Which characteristic of plant root systems is most responsible for their ability to absorb water and mineral nutrients efficient
yarga [219]

Epidermis of plant root systems is most responsible for their ability to absorb water and mineral nutrients efficiently.

<h3>How do plants take up nutrients and water?</h3>

The xylem, a tissue made up of tiny tubes found just below the surface of the plant's stems, is where plants collect water and nutrients. The water is drawn upwards by the molecules in this tissue, which draw water molecules from the soil. We refer to this mechanism as capillary action.

Root hairs are single celled and large surface area , perfect for absorption of water and nutrients. Root hairs are long thin, single cell extension from the epidermis.

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brainly.com/question/22167412

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3 0
1 year ago
Describe two types of drugs and the negative impact the abuse of these drugs can have on a person's health. HELP ME PLEASE
lakkis [162]

Answer:

Narcotic Drugs and medicinal drugs

Explanation:

Narcotic Drugs's efrfects are sedation, dizziness, nausea, vomiting, constipation, physical dependence, tolerance, and respiratory depression. Physical dependence and addiction are clinical concerns that may prevent proper prescribing and in turn inadequate pain management.

3 0
3 years ago
¿Cuál es el principal polisacárido de reserva en los vegetales? ¿Y en los animales?
grandymaker [24]

Answer:

Es la reserva alimentaria de polisacáridos de animales, bacterias y hongos. El glucógeno se llama popularmente almidón animal. El glucógeno se almacena principalmente dentro del hígado (hasta 0.1 kg) y los músculos.

Explanation:

7 0
4 years ago
Answer the questions or write definitions of the first 20
S_A_V [24]

Answer:

1. Hypothesis:

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

2.Ocean systems:

The ocean is a global, interconnected system that has regions, or basins. Water and ocean life move between these basins and up and down the water column. Ocean water circulates around the globe through ocean currents that are either wind-driven currents or density-driven currents.

3.Proteins:

a class of nitrogenous organic compounds which have large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, etc., and as enzymes and antibodies.

4.Saturated fat molecules:

Saturated fat, a fatty acid in which the hydrocarbon molecules have a hydrogen atom on every carbon and thus are fully hydrogenated. (By way of comparison, the hydrocarbon molecules of unsaturated fats have two carbons that share double or triple bonds and are therefore not completely saturated with hydrogen atoms.)

5.Enzymes:

a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.

6.Prokaryote:

a microscopic single-celled organism which has neither a distinct nucleus with a membrane nor other specialized organelles, including the bacteria and cyanobacteria.

7.Eukaryote:

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaea.

8.Hemoglobin:

a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group.

9.Active Transport:

the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

10.Phospholipids:

a lipid containing a phosphate group in its molecule, e.g. phosphatidylcholine.

11.Facilitated diffusion:

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

7 0
3 years ago
The arteriole that delivers blood to the glomerulus is the __________.
Kazeer [188]

Answer:

The arteriole that delivers blood to the glomerulus is the Afferent arteriole

6 0
2 years ago
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