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sweet-ann [11.9K]
2 years ago
14

Which one of the following parasites affect all domestic animals?

Biology
2 answers:
Andru [333]2 years ago
5 0

Answer:

D

Explanation:

FLEA THE NAME ORDER IS SIPHONAPTERA

Vaselesa [24]2 years ago
4 0

Answer:

D fleas affect all animals

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What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
Sliva [168]

Answer: The diffusion of ions along the axoplasm is faster,in myelinated compare to unmyelinated,

Neurons are the structural and functioning units of nervous system.They are the vehicles for transmission of impulses as electrical signals from one part of the cells,and from one part of the body to another.

The basic structural components of a typical neuron are the cellbody, the axon, and the dendrites.

Based on structure neurons are classified as myelinated and unmyelinated.This is based on the the surrounding layer of myelin sheath around the axon. The myelin provides the insulating layer for the axon.And ensures fast movement of impluses.

In myelinated neurons the myelin sheath are interrupted at intervals by gaps along the length of the axon called Nodes of Ranvier. These gaps contains more Na-K channels for influx and out-flux of K and Na+ ions for transmission of impulses.

The cytoplasm of axon is called axoplasm,Since this is surrounded by myelin sheath which contains Na-K+ channels,The rate of diffusion of ions along  these channels is faster for depolarization to take place than in unmyelinated neurons. Inaddtion as these ions  diffusion increases,its jump faster at the nodes of Ranvier (saltatory conduction) to the next axoplasm which further speed up the rate of transmission.

Unmyeinated lacks myelin sheath,therefore the exchange and  the rate of diffusion of ions along the axons is low.

Explnation:

6 0
3 years ago
A bear has an ___________ that is inside its body. Its skeleton is made of bone and cartilage, not of ____________ like a grassh
vova2212 [387]
From what I can tell, The answer is either A or B. Mammals have what is called an Endoskeleton, which means that their skeletons are inside their bodies. A way to remember this is Exo- is similar to exit and when you exit something then you are going outside. Endo- sounds like into, which can relate to being on the inside. Insects have Exoskeletons, which are made from Chitin. Now Agonists are also called Prime Mover muscles, which means they are practically the same thing.
7 0
3 years ago
America in the 1920s
trapecia [35]

Answer:

The Eighteenth Amendment empowered Congress to enforce the Amendment through legislation;

Explanation:

The Eighteenth Amendment empowered Congress to enforce the Amendment through legislation;

5 0
3 years ago
Which of the following biotechnologies is defined as the intentional reproduction of individuals in a population that have a par
Scilla [17]

Answer:

cloning I think mate

Explanation:

thanks

6 0
3 years ago
Why are animal cells more sensitive to changes in water concentration compared to plant cells?​
Zepler [3.9K]
Animal cells do not have cell wall, which prevents an overload of water, therefore can easily burst.
4 0
2 years ago
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