Biology, 06.09.2021 21:20, etaylor3421
Sandra was 74 years old. She often complained being fatigue, having muscle cramps, difficulty swallowing, and needing machines to help her breath. During reflex tests, she also showed absents of some reflexes. Both her presynaptic and postsynaptic neurons were low in numbers. Her postsynaptic neurons were lower than presynaptic neurons. With further investigation, it was revealed that she was exposed to a chemical that increases intracellular protein production in the nerves. This unknown chemical could also increase release of excessive excitatory neurotransmitters which could cause death in postsynaptic neurons. Knowing that rise in massive amount of Ca 2 in cytoplasm of postsynaptic neuron could kill the nerve, propose two mechanisms that may be involved in Ca2 entry to the postsynaptic neurons after the release of the neurotransmitters in the synaptic cleft: (Hint: need to show how Ca 2 enters the neurons)
Answers: 1
Biology, 21.06.2019 21:50, baileyrw
Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere
Answers: 2
Biology, 22.06.2019 02:30, sabrinarasull1pe6s61
Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c. ozone layer hole d. increase in sea levels
Answers: 1
Biology, 22.06.2019 02:40, kaitlynnputtere
Round seeds and yellow seed color are dominant to wrinkled seeds and green seed color. which punnett square represents the correct way to set up the cross rryy ´ rryy? 
Answers: 1
Biology, 22.06.2019 05:20, Lovebamagirl12
Which description provides the best objective summary of the article in the passage?
Answers: 1
Sandra was 74 years old. She often complained being fatigue, having muscle cramps, difficulty swallo...
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