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3 years ago

The axon joins the cell body at a cone-shaped elevation called the?

Biology

1 answer:

astraxan [27]3 years ago

4 0

Answer:

B. axon hillock

Explanation:

The axon hillock is the junction where the cyton connects with the axon. There is only one axon hillock in the neuron and it is a triangular depression of cell boy to the axon. The axons receives impulse from cyton carry to the different parts of the body. The axon hillock is also called initial segment. Because action potential starts here.

Myelin sheath is the cover or layer around the axon and helps in saltatory movement of impulse. The propagation of impulse is fast in myelinated neurons than the non-myelinated neurons.

The neurolemma is the neural membrane of the neurons. It is like the plasma membrane of the cell. The outer covering of neurons is called neurilemma.

Axon collateral is the end of the axon where axon terminals arise. They carry impulse and transmit to the synapse.

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3. What is peptidoglycan?

Dvinal [7]

Answer:

A combination of polypeptides and modified sugars that enclose the entire eubacteria.

Explanation:

A component of bacterial cell walls called peptidoglycan (PGN) promotes innate immune responses. Peptidoglycan, a polymer made of sugars and amino acids, creates the cell wall of the majority of bacteria by producing a layer that resembles a mesh outside the plasma membrane. N-acetylglucosamine and N-acetylmuramic acid residues are alternated in the sugar component. forms a saccules in the cell wall of most bacteria that resembles a bag. It controls bacterial cell shape and is crucial for osmotic stability. A heteropolymer made up of glycan strands carrying small peptides is known as a peptidoglycan.

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1 year ago

Identify three types of natural selection for a polygenic trait.

kaheart [24]

Answer:

A polygenic trait can be described as a physical trait which is influenced by more than one gene.

The three types of selection for a polygenic trait are:

1) Directional Selection: In a directional selection, one of the phenotype is favored in an ecosystem. As a result of this favoring, the allelic frequency changes and shifts in favor of this particular trait.

2) Stabilizing selection: It is a type of natural selection in which the intermediate trait is favored. The population carries a middle trait in abundance.

3) Disruptive Selection: Disruptive trait is a type of natural selection in which the traits on the extreme sides are favored. The intermediate traits are less favored.

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3 years ago

What is the term that describes the softness or harshness of the ride?

Elanso [62]

The word, "Ride" is often used to describe the softness orharshness of a moving car. "Hey, Jim - I see that you got your new Hupmobile.

8 0

2 years ago

Read 2 more answers

Respiration links up the simple sugar oxygen with the gas

My name is Ann [436]

Answer:

Respiration links up the simple sugar, glucose, with the gas oxygen .

Explanation:

In the process of respiration, oxygen is used to breakdown glucose. Water and carbon dioxide are produced due as a result of this reaction. A huge amount of energy, in the form of ATP is also released during this process. ATP is used by almost every cell of the body to carry out normal cellular functions. Energy is mainly stored in the linkage between the second and third phosphate of an ATP molecule.

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2 years ago

Give two examples of scientific theories.

Mice21 [21]

Human come from apes.

Dinosaurs exist.

6 0

3 years ago