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kompoz [17]
3 years ago
6

Explain the structure and function of the lymph nodes. Explain why they may become swollen.

Biology
2 answers:
Alex777 [14]3 years ago
6 0
<span>Mar 11, 2016 - The primary function of the lymphatic system is to transport lymph, a fluid ... They are located deep inside the body, such as around the lungs and heart, ... swelling and pain due to lymphedema in the arm, Hamrick explained. ... This may be discovered when the lymph nodes become enlarged enough to be ...</span><span>
</span>
musickatia [10]3 years ago
3 0
The primary function of all lymph nodes is the production of lymphocytes, which help defend the body against microorganisms and against harmful foreign particles and debris from lymph before it is returned to the blood stream. The major clusters of lymph nodes are in six areas.
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What type of statement would the following be considered? "I'm not a Math person because I'm not smart enough."
rjkz [21]
<h2>Fixed Mindset </h2>

Fixed mindset would be considered because of the reason that people think that their features are fixed. They consider that their qualities cannot be changed. They archive their abilities and skills. Although, they also think that their skills matter to achieve their goals. They consider that struggle does not matter.

The only necessity is talent and intelligence. Therefore the growth mindset is a false statement.

7 0
3 years ago
The bones of the arms, legs, pelvis, and shoulder area
crimeas [40]
The bones of your arms are called humerus, while your forearms are composed of two bones, the radius and ulna. The bones of your fingers are called metacarpals and each one of those small bones are called phalanges.

The bones of your shoulders are composed of the clavicle, the bony part seen just right under the neck. Part of the shoulder area is the scapula, which is located at the back part of the body attached to the upper part of the ribs. They are the triangle-shaped bones you feel when you cross your arms at the back. 

The bones of your thighs are called femur, they are the largest bones in your body. While the bones of your legs are called tibia and fibula. The bones of your toes are called tarsals and each are composed of smaller bones called metatarsals. Your heels also have bones and they are called calcaneus.

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8 0
3 years ago
Explain why a message moving along nerve pathways takes time.
TiliK225 [7]
The conduction of nerve impulses relies upon the movement of positively-charged ions across the nerve cell membrane. The entry of sodium into the cell produces a wave of positive charge that travels down the length of an axon. Then chemicals called neurotransmitters are secreted out of the end of the axon onto the next nerve in the series (the postsynpatic nerve). This narrow space in between neurons is called the synapse. These neurotransmiiters released by the presynaptic nerve bind to receptors on the postsynaptic nerve. The binding of these receptors opens up channels in this second nerve's membrane that allow sodium ions to enter the nerve cell and initiate another wave of positive charge, and so on... The nerve signal can only move as fast as these ions and neurotransmitters can diffuse to generate this process. 

<span>As a professional athlete repeats a given activity many times over, the nerve cells "upregulate" their receptors, meaning that they produce additional receptors to put in the membrane. This is just a natural reaction to the nerve being repeatedly stimulated in the same way over and over. When neurotransmitter is secreted from the presynaptic neuron, there are more receptors on the postsynaptic neuron for it to bind, more channels open up, more ions enter in a shorter time and build up positive charge to create the impulse faster, and so the overall effect is faster. </span>

<span>Additionally, there are sheaths of fatty tissue (called myelin) that insulate the charge in the neuron and allow it to be conducted faster. As people age, these sheaths can start to degrade, making the nerve cell more "leaky" and causing the impulse to be conducted more slowly. </span>
8 0
3 years ago
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Mrrafil [7]
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4 0
2 years ago
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eimsori [14]
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4 0
3 years ago
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