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sergeinik [125]
3 years ago
11

In order to walk, your brain sends a signal to your leg muscles. What allows this to happen?

Biology
1 answer:
Tcecarenko [31]3 years ago
6 0

A. Neurotransmitters diffuse across the membrane of neurons

Explanation:

When we begin to move, the brain initially sends a signal to the spinal cord, then the nerve cells in the spinal cord monitor the exact coordination of the muscles. Signal from the brain and the spinal cord directs the movement of leg muscles. Signal is transmitted by release of neurotransmitter from the neuron to the synaptic cleft and its binding to the receptor of adjacent neuron.

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Which additional observation would support the conclusion that the deer population is not changing size from year to year, meani
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Answer:

The presence of predators of deer which does not allow increase in the population of deer year after year.

Explanation:

In an forest ecosystem, one animal controls the population of another organisms and thus there is no increase in the population of that organism and the ecosystem is in equilibrium state. The population of deer did not increase due to the presence of predators such as lion, cheetah etc and the net population is 0.

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3 years ago
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lesantik [10]
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Why may an infection of the inner ear cause you to lose balance?
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3 0
2 years ago
In the F2 generation of a dihybrid cross two phenotypes appear in the ratio 1:1. two phenotypes appear in the ratio 3:1. four ph
Bezzdna [24]

Answer:

four phenotypes appear in the ratio 9:3:3:1

Explanation:

<em>For a dihybrid cross in which the two genes concerned obey simple dominant/recessive law and are independently assorting, </em><em>four phenotypes are produced in the ratio 9:3:3:1. </em>

The dominant gene takes up the largest ratio (9/16) while the recessive gene takes up the smallest (1/16). Any deviation from 9:3:3:1 and the number of phenotypes produced from a dihybrid cross is an indication that the genes involved do not obey Mendelian laws.

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2 years ago
Drag each characteristic to the correct location on the phylogenetic tree. Complete the phylogenetic tree by matching each chara
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<em>The correct characteristics are - tissue, coelom, segmentation, endoskeleton, and backbone from top to bottom boxes. </em>

Explanation:

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