Elaina has been diagnosed with a small brain tumor. She first went to see her doctor after experiencing symptoms such as feeling very cold, almost fainting, a reduced appetite, and reduced sexual desire. Which of the following structures is her tumor most likely affecting?
a. Broca’s area
b. hypothalamus
c. substantia nigra
d. thalamus

b. hypothalamus

Explanation:

The hypothalamus is a small portion at the center of the brain that is formed by several nuclear bodies. The hypothalamus is the part of the brain that links the nervous system to the endocrine system. The hypothalamus is responsible for important functions such as release of hormones, homeostasis, controlling appetite, sexual behavior, controlling emotion.

Several factors can impair the proper functions of the hypothalamus, they include infection, head trauma as well as brain tumors.

Elaina’s brain tumor most likely must have affected the functioning of the hypothalamus.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.