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3 years ago

14. According to Model 3. what is the stimulus and what is the response cuting childbirth

1 answer:

6 0

According to model 3. During the child birth the stimulus is baby pushes against the cervix and the response would be hypothalamus oxytocin to male uterine walls contract.

Explanation:

The first contractions of the stimulus (labor) pushes the baby towards the cervix that is the lowest part of the uterus. Normal childbirth is done by positive loop. A positive feedback loop is the change in body status than a return to homeostasis.

One of the best example for positive feedback system is child birth. During labor, a hormone called oxytocin is released which intensifies and speeds up contractions.

Child birth will eventually stop the stimulus and stop the child birth feed back loop.

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Forest plantations are forest that stands established by planting and/or seeding in the process of afforestation or reforestation.

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2 years ago

Cual es esta? La verdad es de astronomía pero no me da la opción

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2 years ago

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2 years ago

Read 2 more answers

Phenotypes:

KatRina [158]

Answer:

A: can be subject to environmental conditions.

Explanation:

Phenotype is a genetics term used to describe an individual's observable characteristics that result from interactions with the genotype and nonheritable environmental factors.

Phenotypes are the manifested aspects of the morphology, physiology, biochemical properties, behavior and ecological relationships of an organism.

Given these statements, it can be concluded that two organisms cannot have the same phenotype (not even twins), because there will always be, however small, a morphological or physiological difference between them.

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2 years ago

The cell theory eventually replaced the concept of spontaneous generation as a result of what experimental evidence?

Arisa [49]

Answer:- Option C - evidence that microorganisms cannot grow in boiled broth when new organisms were not allowed to enter.

Explanation:-

Theory of spontaneous generation stated that the living organisms can be created from non living matter. However, this theory was disapproved and replaced by the cell theory which stated that all living organisms are created from cells and new cells arise from pre-existing cells.

There were several experiments conducted by various scientists to disapprove the theory of spontaneous generation however, the experiment that was most successful to do so was the one conducted by Louis Pasteur in 1859.

Description of the experiment:-

-In his experiment, Pasteur boiled a meat broth in a flask (it was known that boiling the broth kills the micro organisms) and then heated the neck of the flask to bend into a S- shape.

The purpose of the S shaped neck was to allow the air to enter into the flask but not the micro-organisms as the micro organisms will settle by gravity in the neck and not reach into the flask.

observations of the experiment :-

1. Pasteur observed that even though the air entered the flask no micro organisms were growing in the flask.

2. Further,when he tilted the flask so that the broth came in contact with the part of the neck where the air borne microorganisms could have settled he was able to observe microbial growth in the flask.

These observations laid the theory of spontaneous generation to rest and proved that organisms can only grow in the presence of pre-existing cells which in this case were the microorganisms.

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3 years ago