The increasingly forceful labor contractions that lead to childbirth are as of r

Question

The increasingly forceful labor contractions that lead to childbirth are as of receptor activation effector shutdown negative feedback positive feedback none of the above A person is facing forward with hands at their sides and palms facing said to be in the supine position prone position anatomical position frontal position sagittal position The simplest chemical units of matter are atoms molecules protons neutrons electrons Which of the following would have the largest size? an atom a molecule a proton a neutron an electron Isotopes of an element differ in the number of protons in the nucleus electrons in the nucleus neutrons in the nucleus electron clouds electrons in energy shells The atomic number represents the number of protons in an atom electrons in an ion neutrons in an atom protons and neutrons neutrons and electrons All atoms with the same atomic number are grouped into molecules cells compounds elements none of the above

Explanation / Answer

Answers: -

Q14.option-'b'-positive feedback.

A positive feedback mechanism is the exact opposite of a negative feedback mechanism.

**With negative feedback, the output reduces the original effect of the stimulus.

**In a positive feedback system, the output enhances the original stimulus.

**A good example of a positive feedback system is child birth.

**During labor, a hormone called oxytocin is released that intensifies and speeds up contractions.

**The increase in contractions causes more oxytocin to be released and the cycle goes on until the baby is born.

**The birth ends the release of oxytocin and ends the positive feedback mechanism

15.option-"c"-anatomical position.

Explanation: -

anatomical position. The erectposition of the body with the face directed forward, the arms at the side, and the palms of the hands facing forward, used as a reference in describing the relation of body parts to one another.

16.option-"a"-atoms.

17.option-"b"-molecule.

18.option-"c"-neutrons in the nucleus.

Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words,isotopes have the same atomicnumber because they are the sameelement but have a different atomic mass because they contain a differentnumber of neutrons.

19.option-"a"-protons in an atom.

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus.

20.option-"d"-elements .

All atoms with the same atomic number are grouped into

Elements.

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