Melatonin is a hormone produced by the pineal gland that regulates the sleep-wake cycle, promoting sleep.

Luteinizing hormone (LH) triggers ovulation, leading to the release of a mature egg from the ovary.

Oxytocin is the hormone that triggers the onset of labor by stimulating uterine contractions.

A barometer is used to measure atmospheric pressure.

Sodium ions (Na+) rush into the neuron during depolarization, causing the membrane potential to become more positive.

Sodium ions (Na+) rush into the neuron during depolarization, causing the membrane potential to become more positive.

Deuterium is the isotope of hydrogen with one neutron, also referred to as Hydrogen-2.

Deuterium is known as heavy hydrogen because it has one neutron in addition to the single proton.

The kingdom Monera includes unicellular and prokaryotic organisms.

The kingdom Plantae is characterized by multicellular and autotrophic organisms.

The kingdom Plantae is characterized by autotrophic organisms that perform photosynthesis.

Newton's Third Law states that for every action, there is an equal and opposite reaction.

Ohm's Law states that the current (I) through a conductor is directly proportional to the voltage (V) across it, given by the formula V = IR.

The second law of thermodynamics states that the entropy of an isolated system will always increase over time.

The second law of thermodynamics states that the entropy of an isolated system never decreases over time.

Calorimetry states that the heat absorbed or released by a substance is proportional to the change in temperature.

Faraday's Law states that the induced emf in a closed loop is equal to the negative rate of change of magnetic flux through the loop.

Faraday's Law of electromagnetic induction states that the induced electromotive force in any closed circuit is equal to the rate of change of magnetic flux through the circuit.

Faraday's Law states that the induced EMF is proportional to the rate of change of magnetic flux.

Faraday's Law states that the induced EMF in a closed loop is equal to the negative rate of change of magnetic flux through the loop.

Gay-Lussac's Law states that the pressure of a gas is directly proportional to its temperature at constant volume.

Fourier's Law states that the rate of heat transfer through a material is proportional to the temperature difference across it.

Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.

Nucleic acids, such as DNA and RNA, are responsible for storing and transmitting genetic information.

Acetic acid bacteria are responsible for the fermentation process that converts alcohol into vinegar.

Acetic acid bacteria are responsible for the fermentation process that produces vinegar.

Lactobacillus is the primary bacterium used in the fermentation of milk to produce yogurt.

Magnesium is a central component of the chlorophyll molecule, essential for photosynthesis.

Magnesium is a central component of the chlorophyll molecule, which is essential for photosynthesis.

The quadriceps femoris muscle is responsible for extending the leg at the knee joint.