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Scorpion4ik [409]
3 years ago
10

What is the longest animal in the world??

Biology
2 answers:
Semenov [28]3 years ago
7 0
Siphonophore ........
Brut [27]3 years ago
7 0
The African bush elaphant
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Tapping the triceps brachii muscle tendon will result in reflexive elbow extension. this is an example of a ____________ reflex.
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<span>This is an example of myotatic or stretch reflex. This is a muscle contraction that happens when there is stretching within a muscle. The myotatic reflex is a monosynaptic reflex, which provides automatic regulation of skeletal muscle length. A muscle spindle is stretched when a muscle lengthens. This increases nerve activity.</span>
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1. Place these events in the correct order to show
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There are two properties that affect the conduction speed of an action potential along an axon: die axon's diameter and whether
Rom4ik [11]

Answer:

 Axons with high  diameter, and myelinated will conduct action potential faster.

Axons with low diameter but myelinated will be  relatively  slow in the speed of action potential transmission

Axons with high diameter and unmyelinated will be relatively slow in action potential transmission.  

Axons with low diameter, and unmyelinated will conduct action potential slowly .

Explanation:

Diameter of Axon affects conduction speed of Action Potential; the thick axons with  high diameter conducts action potential at a faster speed than thin neurons. This is because of the less resistance to the transmission of action potential along the thick axon. However, thin neurons with   lower diameter has more resistance to the action potential conduct along the axon, thus the speed of transmission is slow.  

Myelinated neuron transmits action potential faster because of   jumping of action potential at the nodes of Ranvier where there is highest concentration of all channel proteins and pump proteins, Therefore action potential is conducted at a faster rate as it jumps from one node to another. This is salutatory conduction. It increases the conduct about 50 times compare to unmyelinated neuron. In neuron of human it increases the speed to 100ms-1

.Conversely, unmyelinated neurone  conducts action potential slowly. About 0.5ms-1 . This is because no salutatory conduction takes place because there is no myelin interruption as Nodes of Ranvier

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3 years ago
Increased Serum Interleukin-2 Levels Are Associated with Abnormal Peripheral Blood Natural Killer Cell Levels in Patients with A
amm1812

In rheumatoid Arthritis patients, NK cell levels were abnormally elevated, possibly due to high serum levels of IL-2.

Rheumatoid arthritis (RA), is an autoimmune disease that means our own immune system attacks self healthy cells in the body by mistake, causing inflammation (painful swelling),mainly attacks the joints.

The given study is to investigate the relationship between serum interleukin-2 (IL-2) levels and disease activity.

This study also showed the relationship between absolute numbers of peripheral lymphocyte subsets, autoantibodies, and associated cytokines in patients with rheumatoid arthritis (RA).

The results showed that the number and percentage of NK cells were positively correlated with serum IL-2 levels so, IL-2 can be a reason for elevated level of NK cells

Learn more about Rheumatoid arthritis on

brainly.com/question/16920119

#SPJ4

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2 years ago
Max discovered a beaker full of transparent liquid in the science lab. He hypothesized that since the liquid is transparent like
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B he did not test the liquid
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