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goldenfox [79]
3 years ago
5

When a woman goes into labor during childbirth, the cervix expands which sends a signal to the pituitary gland to release oxytoc

in which results in more contractions which results in more oxytocin being released and so on. What is happening during childbirth?
A) A negative feedback loop.
B) Cell regulation
C) A positive feedback loop.
D)A neutral feedback loop
Biology
2 answers:
FrozenT [24]3 years ago
8 0

Answer;

C) A positive feedback loop.

Explanation;

-Biological systems operate on a mechanism of inputs and outputs, each caused by and causing a certain event. A feedback loop is a biological occurrence in which the output of a system amplifies the system (positive feedback) or inhibits the system (negative feedback)

-Oxytocin is controlled by a positive feedback mechanism where release of the hormone causes an action which stimulates more of its own release. When contraction of the uterus starts, for example, oxytocin is released which stimulates more contractions and more oxytocin to be released.

Sauron [17]3 years ago
6 0
C) A POSITIVE FEEDBACK IS THE CORRECT ANSWER. WHEN CONTRACTIONS HAPPENIT IS TO HELP GET THE BABY OUT AND TO LET YOU KNOW WHEN THE BABY IS COMING SO WHEN CONTRACTIONS START IT MEANS YOU ARE GOING INTO LABER

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1. What is the energy molecule of the cell called?
Pani-rosa [81]

Answer: adenosine- triphosphate or ATP.

Explanation:THIS MOLECULE IS MADE OF NITROGEN BASE (adenine) a ribose sugar and three phosphate groups .

5 0
3 years ago
Which of the following statements about the light reactions of photosynthesis is true? a. There are two distinct photosystems, l
Natali5045456 [20]

Answer:

Option (A).

Explanation:

Photosynthesis may be defined as the process in which the light energy has been converted to the chemical energy so that plants can obtain their food with the help of sunlight, carbon dioxide and water.

Photosynthesis is divided into light reaction and dark reaction. The light reaction of photosynthesis is linked together by the mechanism which is similar to the electron transport chain of mitochondria.

Thus, the correct answer is option (A).

8 0
4 years ago
The part of the cerebral cortex that directs the muscle movements involved in speech is known as:_____.A) Wernicke's area.B) Bro
vredina [299]

Answer:

b) Broca's area

Explanation:

The part of the cerebral cortex that directs the muscle movements involved in speech is known as: broca's area.

5 0
3 years ago
Which substance is coded for by A length of dna?
Yuri [45]

The substance that is coded for by a length of DNA is base. The correct option is A.

<h3>What is a base?</h3>

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The complete question is attached.

The substance that is coded for by a length of DNA is base.

Thus, the correct option is A.

For more details regarding nitrogenous bases, visit:

brainly.com/question/14090794

#SPJ1

4 0
2 years ago
Read 2 more answers
HELP ME PLZ :((( IM SOOOO STUCK
emmasim [6.3K]
1)
To feel an impulse, the receptor must be sent a signal to the brain where it could be interpreted. The signal should be caught by the receptor, send into the spinal cord, then arrives at the brain.
1. Object touch the heel 
2. impulses generated in the receptor cells
3. impulses transmitted through a sensory neuron
4. impulses transmitted through neurons in the spinal cord
5. impulses reach the brain
6. brain process the impulses
7. you feel the object touching your heel

2)
Nerves
Spinal cord
Brain

The nervous system is made of central nervous system and peripheral nervous system. The peripheral nervous system is made of the network of nerves. The central nervous system is the brain and spinal cord that will receive impulse and send a response afterward. While brain could send the various signal, spinal cord could only send responses for reflexes.

3)
a. the diagram is showing Neuron cell
The nervous system is made up of multiple neuron cells. The neuron cells are specialized in sending a signal. It has a long axon that could deliver the signal far away. The signal is only one way though, so you will need a different neuron for receiving receptor signal and sending a response signal.


b. Two missing labels in the picture would be: axon.
It seems both of the label pointing out to the axon of the nerve cell. Since both of it pointing the same neuron cell, it should have the same name. Axon has a role in delivering nutrient and signal across the body.

c.  Myelin sheath will allow the signal to run faster. This will help in a process that needs speed like reflexes. The sheath will cover a part of the neuron and prevent the ion exchange. Myelin sheath stop in some part called node of Ranvier. This will allow the action potential to "leap" from node to node, make it travel much faster.
8 0
4 years ago
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