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Crazy boy [7]
3 years ago
8

Friend me please. i only have one friend on here.

Biology
1 answer:
Mekhanik [1.2K]3 years ago
4 0
Sure! I’ll friend ya Rn
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Which of the following types of reactions would decrease the entropy within a cell?
kobusy [5.1K]

Which of the following types of reactions would decrease the entropy within a cell?

Answer is : Option A : anabolic reactions

The general meaning of entropy can be termed as the systems that naturally progress from order to disorder. Anabolic reactions contains all the metabolic processes that build bio-molecules.

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When water reaches an arctic region, it sinks because it becomes
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C. less dense as it gets colder and less salty
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How do fossils and fossil records support the idea that life change over time? How is the fossil age measured?
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Fossils, or preserved parts of organisms from the distant past, have shown that species change over time. Radiometric dating can be used to determine the age of fossils by measuring the how much of the radioactive materials in each rock layer have broken down.

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3 years ago
Can somebody answer the unsolved ones ?
kherson [118]
There are 15 students in math class.at the begning of class everyone races into class as everyone love maths.the professor takes note of the first 5 students who gets class and ranks them according to the order in which they entred as their top 5 favourite students. in how many different ways could the professor rank their top 5 students using formulla from combinations and permutations
4 0
3 years ago
When an action potential arrives at the axon terminal of a motor neuron, which ion channels open?
HACTEHA [7]

Answer:

Calcium voltage gated ion channels

Explanation:

There are two types of ion channels involved in the neuromuscular junction and end plate potentials: voltage-gated ion channel (responsive to changes in membrane voltage which cause the voltage gated ion channel to open) and ligand-gated ion channel (responsive to certain molecules such as neurotransmitters).

The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles  to release acetylcholine via exocytosis into the synaptic cleft.

I hope you find this information useful and interesting! Good luck!

3 0
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