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3 years ago

Why are All Cells Not The Same ?

1 answer:

4 0

Cells have different uses and functions. There must be differentiation/diversity between cells to form a functional organism.

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The adrenal medulla is stimulated to release catecholamines during sympathetic autonomic nervous responses. True or False

forsale [732]

Answer:

True

Explanation:

Catecholamines refer to the hormones produced by the adrenal gland present on the upper side of the kidney. The catecholamine hormone includes the epinephrine, norepinephrine and the dopamine.

During stress conditions, the sympathetic division of the autonomic nervous system gets activated which leads to the release of the norepinephrine from the postganglionic neurons and the prolonged-release leads to the release of the adrenaline from the adrenal glands.

Thus, true is the correct answer.

4 0

3 years ago

A condition of Diabetes Insipidus, whereby an individual lacks the ability to produce ADH, will cause which of the following to

shutvik [7]

Answer:

D. Both A and B ar expected

Explanation:

Decreased ADH secretion which will lead to less absorption of water back into the blood thus increasing blood osmolarity.

8 0

4 years ago

small group of 100 people decide to isolate themselves from the world and move to a small and remote deserted island. Out of thi

irina [24]

Answer:

Frequency of p $= 0.684$

Frequency of p $= 0.316$

Number of individuals with homozygous dominant (AA) $= 47$

Number of individuals with heterozygous (Aa) $= 43$

Number of individuals with homozygous recessive (aa) $= 10$

Explanation:

Out of 100 people, 10 have albino skin (aa)

So, the frequency of homozygous recessive individuals $(q^{2})$ is $\frac{10}{100} = 0.1$

Now, q will be

$= \sqrt{q^{2} } = \sqrt{0.1} \\= 0.316$

As per Hardy Weinberg's equation -

$p + q = 1$

Substituting the value of q in above equation, we get -

$p + 0.316 = 1p = 1 -0.316\\p = 0.684$

Now the frequency of homozygous dominant (AA) will be

$p^{2} = 0.684^{2} \\= 0.467$

Hence, out of 100 people $0.467 * 100 = 46.7 or 47$ people are homozygous dominant (AA)

Like wise out of 100 people $0.1 * 100 = 10$ people are homozygous recessive (aa)

As per As per Hardy Weinberg's equation-

$p^{2} + q^{2} + 2pq = 1\\$

Substituting the values in above equation, we get -

$0.467 + 0.316 + 2pq = 1\\2pq = 1 -( 0.467+ 0.1)\\2pq = 0.433$

So, out of 100 people $0.433 * 100 = 43.3 or 43$ people are heterozygous (Aa)

7 0

4 years ago

Nerve impulses are sent to slow the heart's rate of contraction. The nerve fibers sending these signals will most likely belong

Sladkaya [172]

Answer:

The correct answer is option 4. Parasympathetic division.

Explanation:

The parasympathetic division is one of the three divisions of the ANS or autonomic nervous system. It also helps in the rest system or digest system as it saves energy by slowing the heart pace by slowing the rate of contraction. This is performed with the help of nerve fibers that send signals.

Parasympathetic nerve division increases the intestinal and activity gland. This nerve division helps in relaxing the sphincter muscle in the GI tract.

Thus, the correct answer is option D.

8 0

3 years ago

The amount of air in the lungs after a normal exhale is called the ______________ .

il63 [147K]

Answer:

Expiratory reserve volume

8 0

3 years ago