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sadewright21404
05.10.2019 •
Biology
Describe the events that occur at a neuromuscular junction
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Ответ:
1. release of ACH
2. activation of ACH receptors
3. generation of muscle action potential
4. breakdown of ACH
hope it helps u
Ответ:
Part A) y = 8.1 • e^ ln(2)/12t
Part B) 10.8 mm^2
Explanation
Part a)
You are told the initial area is 8.1 mm^2 this is when t (time) = 0.
Y = a • e^bt where b and a are constant to be found for your questions
Now regardless of the value of b, if t = 0 then the expression
e^bt will always equal 1 as bt will always equal 0 if time is 0 (note: anything to the power of 0 is 1)
Therefore when t=0 (initial area is 8.1mm^2 and y = initial area)is substituted
You obtain
8.1mm^2 = a • e^b0
8.1mm^2 = a • e^0
8.1mm^2 = a
Therefore you have obtained the value of a.
You are also told that the area doubles every 12 minutes, so in 12 minutes time, the area will be 16.2 (8.1mm^2 multiplied by 2)
Hence substitute t = 12 minutes
y = 16.2 and a = 8.1 in the expression to get
16.2 = 8.1 • e^12b
Now rearrange to obtain b (the only unknown value)
16.2/8.1 = e^12b
e^12b = 2
Take ln of both sides (note lne^12b becomes 12b)
12b = ln (2)
b = ln(2) / 12
Therefore your final equation is
y = 8.1 • e^ln2/12 t
Part b)
You know the equation now and you have t= 5 minutes so simply substitute to obtain occupied area (denoted by y)
y = 8.1 • e^ln2/12 • 5
= 10.81220
= 10.8mm^2 (nearest tenth as your question asks for)