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Ede4ka [16]
3 years ago
8

Each red blood cell contains about 250 million hemoglobin molecules and so can carry at least one billion molecules of oxygen.

Biology
1 answer:
lawyer [7]3 years ago
4 0
I'm sure it's true .because sperm particles contain 250 million particles.
If we look to the nucleus contain 1.5 million neurons.
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Whether bats undergo metamorphosis
djyliett [7]

Answer: no they don’t

Explanation: bats are mammals. They don’t undergo re-organisation of tissues, they simply grow.

7 0
3 years ago
Where do preganglionic neurons synapse with postganglionic neurons in the sympathetic nervous system?.
FinnZ [79.3K]

Preganglionic axons synapse at the sympathetic chain ganglia with a postganglionic neuron. The postganglionic neuron then leaves the sympathetic chain ganglia through a gray ramus communicans (unmyelinated axons) and reenters the spinal nerve and travels to the skin and blood vessels throughout the body.

5 0
2 years ago
Why do the levels of GH-RH and CRH rise during the resistance phase of the general adaptation syndrome?
Alenkinab [10]

Answer:

During the resistance phase of the general adaptation syndrome, the human body undergoes a process of adaptation or tolerance to stress, which requires an increase in levels of growth hormone (GH) and cortisol, so it is observed rise the levels of GHRH and CRH.

Explanation:

General adaptive syndrome is a product of the stress to which an individual is subjected, causing a number of symptoms reflecting the loss of normal body balance, symptoms that can be both physical and psychological. This syndrome has three phases:

  • <em>Alarm phase. </em>
  • <em>Resistance phase. </em>
  • <em>Exhaustion phase. </em>

The second phase, resistance, is due to an <u>adaptation or tolerance when the stressful stimulus is maintained</u>. At this stage, an increase in blood levels of growth hormone and cortisol -which contribute to the stress tolerance process- is usually observed, increasing the bioavailability of blood glucose and endogenous steroids.

Both GHRH (somatocrin) and CRH (corticotropin-releasing hormone) are produced by the hypothalamus and activate the release of GH and adrenocorticopotrotrope hormone (CRH) by the pituitary gland, producing:

  1. <em>Increased levels of circulating growth hormone, necessary to regulate metabolism, and increase the amount of blood glucose. </em>
  2. <em>Increased levels of cortisol, from the adrenal glands, in response to stress.  </em>

In the resistance phase of general adaptative syndrome, GHRH and CRH levels increase to regulate adaptive changes that occur in the body of the individual who has it.

Learn more:

Hormonal response brainly.com/question/6337416

5 0
3 years ago
An element has 2 valence electrons and 3 energy levels. It is located in<br> group
kodGreya [7K]

Answer: 3

Explanation:

All elements in group 3 have 3 levels of energy.

Na (sodium) has 3 valences the inner has 2 electrons, the middle has 8 electrons and the outer has 1 electron.

This will continue across the group 3 adding one more electron to the outer valence until Ar (argon).

Remember the Octet rule of 8..?

4 0
3 years ago
HELP!!!!!
Vinil7 [7]

Answer:

Hey there you got this! remember that A -T and C-G for the complement strand. Don't forget the 5' to 3'.

Usualy teachers if they don't specificy then the one you are given is 5' to 3' which means the mone you make lokking left to right is 3' to 5'. Make sure to choose the correct answer choice that looks like this.

6 0
3 years ago
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