<span>Hydrogen bonds do not
form in all molecules because hydrogen can only form these bonds with highly
electronegative atoms. It is a weak type of force that happens when a hydrogen
atom is bonded to an atom which has a high electronegativity. For water, it is present because hydrogen is bonded to oxygen which is very electronegative.</span>
Answer:
<h2>mark brainleast plz please </h2>
A phytochemical is a naturally occurring substance found in plant foods that may help prevent and treat chronic illnesses or diseases like cancer and heart disease. Some of these give plants their pretty colors, like the blue in blue berries and the red in raspberries and other phytochemicals give plants their distinctive aroma. They offer many benefits to human health when consumed such as offering protection to many chronic diseases such as diabetes, cancer, heart diseases among others.
Reflex action refers to the response to a stimulus, while reflex arch refers to the path taken by the reflex action.
<h3>What is the nervous system? </h3>
1. Low oxygen levels are detected by sensory receptors in the arteries.
2. An impulse is produced by sensory neurons.
3. Certain parts of the brain get an impulse from the central nervous system.
4. Motor neurons carry messages from the brain.
5. Isabel's respiration becomes more rapid.
Reflex actions are immediate, reflexive reactions to stimuli that limit bodily harm.
Therefore, it travels to the brain via the central nervous system and sends impulses via Isabel's motor neurons, which aid to speed up her breathing.
Learn more about neurons, here:
brainly.com/question/12040535
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the two main skeletal systems to support the tissue of the body is bone and cartilage
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