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Scilla [17]
3 years ago
6

When does a girl normally go through puberty?living environment

Biology
2 answers:
MariettaO [177]3 years ago
7 0

Usually, puberty starts between ages 8 and 13 in girls and ages 9 and 15 in boys.

OverLord2011 [107]3 years ago
4 0
Puberty usually starts around 11 years of age, but it may start as early as 6 or 7 years of age. In boys, puberty begins around 12 years as age, but may start as early as 9 years of age. Puberty is a process that goes on for several years. Most girls are physically mature by about 14 years of age. Boys mature at about 15 or 16.
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Inessa [10]
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7 0
3 years ago
Inadequate calcium in the neuromuscular junction would directly affect which of the following processes?
AysviL [449]

Answer:

a. Release of acetylcholine from the synaptic vesicles

Explanation:

The events on neuromuscular junction:

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. Neurotransmitter ACh 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.

3 0
3 years ago
Which of these terms best describes an area of skin that is innervated by a particular spinal nerve?
EleoNora [17]

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Explanation:

8 0
3 years ago
The most complex processing of sensory information occurs in the cerebral cortex.<br> ОТ<br> OF
Stella [2.4K]

Answer:

TRUE

Explanation:

took the test

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3 years ago
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mote1985 [20]

Answer:

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is your answer may it helps you frnd

3 0
3 years ago
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