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IRINA_888 [86]
3 years ago
8

Acetylcholine receptors on skeletal muscles are described as being ionotropic receptors because

Biology
1 answer:
DerKrebs [107]3 years ago
3 0

Answer:

they are Na+, K+ and Ca2+ ion channels.

Explanation:

Ionotropic acetylcholine receptors are also called nicotinic acetylcholine receptors because beside acetylcholine (Ch) they respond to nicotine. These receptors are  primary receptors in muscle for motor nerve-muscle communication that controls muscle contraction.

Two molecules of ACh are required for receptor to open. Since the receptors are  linked to ion channels, the channels open. Opening of the channel allows positively charged ions to move across it: sodium enters the cell and potassium exits.

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Please helpe with this. I'm very weak with science ​
Mariulka [41]

A. is correct i believe

5 0
3 years ago
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During which stage of a cell's cycle do the replicated chromosomes thicken and<br> become visible?
trasher [3.6K]

Answer:

Prophase

The replicated chromosomes thicken and become visible as separate chromosomes during prophase stage of mitosis. :)

6 0
3 years ago
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7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second?
nydimaria [60]
Kinetic energy = 0.5*M*V^2 

 Q7-
 
0.5*3*(2^2)= 6J

Q8a- 

0.5*2*(2^2)= 4J
0.5*4*(3^2)=18J 
the second ball has more kinetic energy.

Q8b-

at the max height, all the kinetic energy is converted to potential energy, 

gravitational potential energy is = M*g*h

that theory would apply if you wanted to work out the maximum height achieved if the balls were thrown upward by rearranging. But, we are simply working out which ball will have more potential energy so:

First ball:
2kg*9.81(g)*10m = 196.2J

Second ball
4kg*9.81*10m= 392.4J

The second ball has more potential energy 


5 0
3 years ago
How long did it take N.E.A.R. to reach Eros?
Katen [24]

Answer:

Explanation:

NEAR remained in this orbit for 10 days and then was backed out in stages to a 100 km circular orbit by September 5, 2000. Maneuvers in mid-October led to a flyby of Eros within 5.3 km of the surface at 07:00 UT on October 26.

Launch date: February 17, 1996 20:43:27 UTC; ...

Closest approach: June 27, 1997 12:56 UTC; .

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3 years ago
Which of the following nitrogen
Aloiza [94]
I think its free nitrogen
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2 years ago
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