I think it should be this
The question is incomplete. The complete question is:
Question: Impulses originating in the part of the brain called the medulla would most directly affect which body structure?
a. A leg muscle
b. A ligament
c. An arm bone
d. The heart
Answer:
d. The heart
Explanation:
The medulla oblongata contains a number of reflex centers for regulating vital body functions such as heartbeat, breathing, and vasoconstriction. The medulla contains several nuclei, a collection of neuronal cell bodies.
For example, impulses originated in the cardiovascular center regulates the rate and force of the heartbeat and the diameter of blood vessels. Impulses from the cardiovascular center flow along sympathetic and parasympathetic neurons. An increase in sympathetic stimulation from the cardiovascular center of medulla increases heart rate and contractility while a decrease in sympathetic stimulation decreases heart rate and contractility.
<span>The nervous system allows for humans to experience a number of sensations, both good and ill. This allows for humans to be able to understand whether or not a certain stimulus should be experienced again or if it should be avoided in the future. This allows for humans to adapt to their surrounds.</span>
<h2> Hydrogen bonding in water</h2>
Explanation:
- Water has various properties to maintain the life.It is polar, taking into account the arrangement of hydrogen bonds, which permit particles and other polar atoms to disintegrate in water. Along these lines, water is an astounding dissolvable.
- The hydrogen bonds between water atoms enable water to hold heat superior to numerous different substances.Water's firm powers take into account the property of surface strain. These interesting properties of water are significant in the science of living life forms.
- Hence, the right answer is " are result of hydrogen bonding".