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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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magine you are trying to determine the phenotypic ratio of hair color. Brown (B) hair color is the dominant trait and blonde (b)
skad [1K]

Answer:

1:1 (brown:blonde)

Explanation:

Brown hair color (B) is dominant over blonde hair color (b).

Heterozygous parent will have the genotype Bb

Homozygous recessive parent will have the genotype bb.

Crossing hetezygous parent with homozygous recessive parent:

Bb   x   bb

Progeny: Bb, Bb, bb, and bb.

2 Bb brown hair

2 bb blonde hair

Phenotypic ratio = 1:1 (brown:blonde)

The correct answer is  1:1 (brown:blonde).

8 0
3 years ago
The mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 mc024-1.jpg 1023.
marin [14]
The mass of one atom of carbon in the correct number of significant figures is 1.99×10-²³. There are four significant figures each in both the atomic mass of carbon (12.01 g) and Avogadro's number, so the answer must also have 4 significant figures. The operation is shown below:

<span>12.01 / (6.022x10²³) = 1.994x10</span>₋²³<u />
5 0
3 years ago
Read 2 more answers
Which of the following is NOT evidence of chemical change?
alexgriva [62]

Answer:

it turns cold

7 0
3 years ago
Are there lysosomes in plant cells?
Nata [24]

Lysosomes are organelles that float on the cytoplasm and their main function is to secrete waste out of the cell and digest.

Lysosomes are found in eukaryotic cells and yes, they are present in plant cells.


Hope it helped.


BioTeacher101

5 0
3 years ago
As skin cells are _____________, meaning they are mitotically active and continue to transition through the cell cycle, the woun
jarptica [38.1K]
The answer to this question would be labile.

A permanent cell is the one that will not divide after fully developed. This includes the heart and brain cells. That is why when these organs damaged there will be a permanent loss of function.
Stable cell only divides in some occasion. The example would be liver cells or kidney cells.
4 0
3 years ago
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