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miskamm [114]
4 years ago
13

Neurotransmitters are released from axon terminals via

Biology
1 answer:
love history [14]4 years ago
6 0

Answer:

Neurotransmitters are released from axon terminals via exocytosis

Explanation:

Dendrite is the receiving part of the presynaptic neuron, while axon is the transmitting part of the neuron. So, after initiation, action potentials travel down axons to the terminals. Action potential travels through the membrane of the presynaptic cell causing the voltage-gated channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells (exocytosis of the vesicle's content). Neurotransmitter ACh (from the vesicles) binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell). Depolarization occurs because sodium enters the cell as a result of neurotransmitter receptor binding.

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Which of the following is NOT a density-dependent factor affecting population growth?
sveta [45]

B

<u>Temperature</u> is NOT a density-dependent factor affecting population growth

Explanation:

Density-dependent factors mean variables that are affected by the density of the population. The opposite of density-depend is density-independent factors. These are those variables that affect the density of the population but are not affected by the density of the population.

In this case, temperatures are not affected by the density of the population. However, temperatures affect the density of the population. Most individuals can only survive within an optimal temperature range.

The rest of the choices are density-dependent variables

Learn More:

For more on dependent and independent variables check out;

brainly.com/question/3205171

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brainly.com/question/4600039

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7 0
4 years ago
Why are ribonucleoside triphosphates the monomers required for rna synthesis rather than ribonucleoside monophosphates?
torisob [31]

Answer:

The phosphates provide energy for the bond between each nucleotide.

Explanation:

When each nucleotide is being bound, the two extra phosphates provide the energy needed for it to form the bind between each nucleotide that's being added to the RNA. Without this energy, the RNA wouldn't be able to form due to the lack of enough energy.

5 0
3 years ago
The boxer crab, Lybia tesselata, carries a small pair of anemones in its claws. When approached by a predator, it waves the anem
PtichkaEL [24]

This is a symbiotic relationship between the Boxer crab and sea anemone.

<h3><u>Explanation</u>:</h3>

The symbiosis is a type of relationship between two species which has benifit for both the participating organisms.

Here in case of boxer crab, the crab gets the help from the sea anemone in the form of protection. The sea anemone chases the predators and thereby saves the organism from being hunted.

On the other hand, the sea anemone gets food from the crab's prey which he hunts.

So there's a benifit for both.

5 0
3 years ago
Which of the following refers to the increasing size of deserts worldwide?
Stella [2.4K]
The correct answer is: desertification.

Desertification is a process in which a land which was not a desert before, becomes one. This process can include drying out- through for example loss of water source, such as river diversion-  and the loss of vegetation.
5 0
3 years ago
13. The allele that results in the absence of a tail is autosomal recessive. From which parent do
PSYCHO15rus [73]

Answer:

a) both parents

Explanation:

autosomal recessive means that both copies of the "no tail" allele must be inherited in order to produce a dog with no tail, therefore the answer is both parents

5 0
3 years ago
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