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Tresset [83]
3 years ago
13

1. Please describe the signal transmission across a myoneural junction that allows the nervous system to move the muscles of a f

ootball player during a game? Please be detailed with your description. Hint: Review your video worksheets from your lesson for details on nerve impulse transmission. (5 points)
Biology
1 answer:
SSSSS [86.1K]3 years ago
6 0
1. Action potential reaches the axon terminal and depolarizes it.

2. Depolarization opens voltage-gated calcium channels, enabling influx of Ca into the neuron.

3. Calcium binds to specialized proteins on vesicles (containing pre-made acetylcholine) and triggers them to fuse with the neuron membrane at the synapse.

4. Exocytosis of acetylcholine into the synaptic cleft occurs.

5. Acetylcholine diffuses across the synapse and binds to nicotinic receptors on the end plate of the myocyte.

6. Activated nicotinic receptors, themselves ion channels, cause cation influx into the myocyte and generate an end plate potential. This eventually gives rise to the full depolarization within the myocyte that enables contraction.
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which classification level is broader than the kingdom level; which branch of biology is concerned with the naming and classifyi
shtirl [24]

Domain is broader than the kingdom level.

Levels of classification that are broader than phylum are regions and kingdoms. There are five kingdoms: Monrea, Protista, Fungi, Plants.

Taxanomy is the branch of biology concerned with the naming and classifying of organisms.

Protists are described as diverse organisms because they have many different characteristics. They are either heterotrophs or autotrophs. They are also eukaryotes that are not classified as plants, animals or fungi.

Animals group of organisms includes only multicellular heterotrophs.

If two species belong to the same class, they also belong to the same taxon higher up in the hierarchy. Here they belong to the same side and kingdom.

The gradual change in a species over time is called Evolution.

The levels of classification that are broader than the phylum are domains and kingdoms.

Taxonomy is the science of naming, describing and classifying all living organisms, including plants.

To know more about Taxanomy here

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6 0
10 months ago
What happens to a female sex cell that has left the ovary if it isn't fertilised?
Juli2301 [7.4K]
A sex cell that hasn't been fertilized and has left the ovary would come out during the menstrual cycle under normal circumstances.
6 0
3 years ago
4. What kind of bond is created by a weak electrical attraction between polar molecules?
Rzqust [24]

Answer:

hydrogen bond

Explanation:

by weak electrical attraction between two polar molecule hydrogen bond is developed between them

the example is water molecule in case of water two water molecules are attracted toward each other by strong hydrogen bond which is developed between highly electronegative oxygen of one water and electropositive hydrogen of another water molecule

8 0
2 years ago
Give the best description of the regioselectivity and stereospecificity in the oxymercuration of an alkene. anti-Markovnikov ori
nlexa [21]

Answer:

The Markonikov's rule determines where to add a nucleotide in the reaction

Explanation:

In organic chemistry, the organic carbonyl reactions are governed by a set of rules. One of them is the Markovnikov's rule. Basically, the rule determines where the addition of the nucleophile and a hydrogen will take place in a chemical reaction involving alkene addition. In the reaction principles, there are rules to follow based on the syn and anti addition. This refers to which side the two groups will face. they add to the same side an called the syn. When its opposite side, then its anti.

8 0
3 years ago
The motor neuron pathways _______________________.
Oliga [24]

Answer:

include the brain and spinal cord

Explanation:

4 0
2 years ago
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