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hammer [34]
2 years ago
11

In times of stress the sympathetic nervous system stimulates the _____ which then secretes _____.

Biology
1 answer:
yawa3891 [41]2 years ago
8 0
In times of stress the sympathetic nervous system stimulates the adrenal medulla which then secretes catecholamines. The catecholamines includes; Dopamine, epinephrine and norepinephrine. Catecholamines are made by nerve tissue, the brain, and the adrenal glands. They help the body respond to stress or fright and prepare the body for "fight or flight" reactions.
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3 years ago
In the formula, E K = 1/2 • m • v 2 if mass (m) was doubled, how much would kinetic energy
Viktor [21]

Answer:

mass doubled makes KE twice as large

velocity doubled makes KE 4 times as large

Explanation:

Try it with an example

m = 4

v = 8

KE = 1/2 m * v^2

KE = 1/2*4 * 8^2

KE = 1/2 * 4 * 64

KE = 128

Now double the mass

m  = 8

v = 8

KE = 1/2 8 * 8^2

KE = 1/2 8 * 64

KE = 4 * 64

KE = 256 double what it started out as.

Now do it again.

m = 4     That was the original mass

v = 16

KE = 1/2 4 * 16^2

KE = 2 * 256

KE = 512

When the velocity is doubled the KE becomes 4 times as big.

4*128 = 512

4 0
3 years ago
"A technician is reading the plates from a sputum culture. On the sheep blood agar (SBA), she sees flat spreading colonies with
sleet_krkn [62]

Answer:

P. aeruginosa

Explanation:

<em>P. aeruginosa</em> is a gram-negative bacteria that belongs to the family Pseudomonadaceae.

From the given question the following points lead us to conclude that the colony that will be growing would be of P. aeruginosa :

1. Flat spreading colonies with a metallic sheen on SBA - <em>P. aeruginosa</em> is known to produce smooth colonies with flat edges.

2. Fluorescent green color in the media with clear colonies on cetrimide agar - <em>P. aeruginosa</em> is known to produce pyoverdin which is a fluorescent pigment under low iron conditions.

3. Medium clear colonies that have a "fruity or grape-like odor" on MacConkey Agar - <em>P. aeruginosa</em> has a sweet fruity odor which is its characteristic odor because of the production of trimethylamine.

Thus, from all these characteristics one can conclude that the organism in the culture is <em>P. aeruginosa. </em>

6 0
2 years ago
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