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fredd [130]
3 years ago
7

Predict what would happen if the calcium ion channels in the axon terminal were blocked?

Biology
2 answers:
DedPeter [7]3 years ago
6 0
Release of a neurotransmitter across the synapse is triggered by the entry of Ca++ into the presynaptic axon. No Ca++ entry means no transmission across the synapse.
777dan777 [17]3 years ago
6 0

Answer:

If the calcium ion channels in the axon terminal were blocked, then no synaptic transmission occurs.

Explanation:

The synapse has 2 parts one is post synaptic cleft and other is pre synaptic cleft. The pre synaptic cleft contains synaptic vesicles which  have neurotransmitters. These neurotransmitters are in the inactive form.

When the calcium ion is coming and bind with the vesicle, the neurotransmitter gets activated. Then the vesicle binds with another protein and releases the neurotransmitter to the post synaptic vesicle. Thus information goes from pre synaptic cleft to post synaptic cleft and synaptic transmission occurs.

If the calcium ion channel is blocked, no calcium ions come into the axon terminal, the neurotransmitter can't active and no synaptic transmission happens.

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The synthesis of protein or carbohydrate polymers always produces which of the following as a byproduct?
murzikaleks [220]

Answer:

Water

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3 0
3 years ago
The _____ force keeps molecules in a fluid together. (I'm pretty sure the options may be gravitational, weak, electromagnetic, a
Mnenie [13.5K]

Answer:

cohesive force

Explanation:

The first three forces are also collectively called van Der Waals forces. All of the inter molecular forces that hold a liquid together.

7 0
3 years ago
During photosynthesis, the energy used to pump protons comes from ___________, whereas in cellular respiration it comes from ___
Annette [7]

During photosynthesis, the energy used to pump protons comes from ______light_____, whereas in cellular respiration it comes from ______NADH/FADH₂_______.

<h3>What are the steps in photosynthesis?</h3>
  1. The first step in photosynthesis is the absorption of light by chlorophyll bound to chloroplast thylakoid proteins. The absorbed light energy is used to remove electrons from electron donors such as water to form oxygen.
  2. The electrons are then transferred to the primary electron acceptor, quinine (Q.). Electrons are further transferred from the primary electron acceptor to the final electron acceptor (usually NADP⁺).
  3. Proton transfer from the thylakoid lumen to the stroma via the F₀F₁ complex generates ATP from ADP and Pi.
  4. The NADP and ATP produced in steps 2 and 3 provide the energy, and the electrons power the process of reducing the carbon to a six-carbon sugar molecule.

The first three steps of photosynthesis, are directly dependent on light energy and are thus, called light reactions, while the reactions in the last step are independent of light and thus are termed dark reactions.

To know more about photosynthesis visit:

brainly.com/question/1388366

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5 0
11 months ago
The following are steps used to construct a cladogram that best reflects the evolutionary relationships of a group of species. W
svetlana [45]

Answer:

Apply the principle of parsimony

Explanation:

A cladogram is used to show or illustrate hypothetical speciation and relationships between species. They are commonly used to classify animals.

The principle of parsimony argues that the simplest of competing explanations is most likely to be correct.  

In order to construct a cladogram that best reflects the evolutionary relationship of a group of species. Application of the principle of parsimony  will help in deciding which tree is most likely to have occurred based on the fewest character state changes.

8 0
3 years ago
Explain how mutations cause cancer cells.
earnstyle [38]

Answer:

Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.

Explanation:

4 0
2 years ago
Read 2 more answers
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