The baby pushesagainst the cervix,causing it to stretch.normalUterus19. The image to the right is an example of:a. a negative feedback loopb. a positive feedback loopStretching of thecervix causesnerve impulsesto be sent tothe brain.Oxytocin causesthe uterus tocontract20. If the calcium in your blood decreases below the set point, a gland inthe brain will sense the decrease and send a chemical message toyour bones. Your bones will release calcium into the blood, bringingblood calcium levels back up. This is:a. a negative feedback loopb. a positive feedback loopUmbilicalcordCervixThe brain stimulatesthe pituitary to releaseaxytocin.

Question
Asked Jan 27, 2020
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The baby pushes
against the cervix,
causing it to stretch.
normal
Uterus
19. The image to the right is an example of:
a. a negative feedback loop
b. a positive feedback loop
Stretching of the
cervix causes
nerve impulses
to be sent to
the brain.
Oxytocin causes
the uterus to
contract
20. If the calcium in your blood decreases below the set point, a gland in
the brain will sense the decrease and send a chemical message to
your bones. Your bones will release calcium into the blood, bringing
blood calcium levels back up. This is:
a. a negative feedback loop
b. a positive feedback loop
Umbilical
cord
Cervix
The brain stimulates
the pituitary to release
axytocin.
help_outline

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The baby pushes against the cervix, causing it to stretch. normal Uterus 19. The image to the right is an example of: a. a negative feedback loop b. a positive feedback loop Stretching of the cervix causes nerve impulses to be sent to the brain. Oxytocin causes the uterus to contract 20. If the calcium in your blood decreases below the set point, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up. This is: a. a negative feedback loop b. a positive feedback loop Umbilical cord Cervix The brain stimulates the pituitary to release axytocin.

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Expert Answer

Step 1

Oxytocin:

It is a hormone and a neurotransmitter which is formed in the brain by the activation of hypothalamus. It is the transported to and released by the posterior lobe of the pituitary gland. It has an important role in the female reproductive system from sexual activity till childbirth and lactation.

Step 2

Positive feedback:

It is a process in which the terminal products of some action results in more occurrence of that action in a feedback loop. This intensifies the original action.

For example: During the baby delivery in humans.

Step 3

The correct option is b). It is a type of positive feedback loop.

The cervical stretching acts as a stimulus. It influences the response of the hypothalamus (integrating center) to trigger the posterior lobe of pituitary. The pituitary lobe then releases the oxytocin hormone in the blood. This hormone then activates the uterus...

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