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Tutor profile: Kelly S.

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Kelly S.
Master in psychology student with 4+ years of psychology course experience
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Questions

Subject: Health and Medicine

TutorMe
Question:

What is an SSRI and how does it help to reduce symptoms of Major Depressive Disorder?

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Kelly S.
Answer:

An SSRI is a Selective Serotonin Reuptake Inhibitor. This means that it blocks the reuptake of serotonin in the brain. When serotonin is released into a synapse, SSRI's bind to the neuron releasing serotonin to prevent it from taking back in the serotonin it has just released. Therefore, by blocking the reuptake of serotonin, SSRI's increase the amount of serotonin in the brain. Because serotonin is a neurotransmitter that regulates mood and is associated with happy positive feelings, increasing the amount of serotonin in the brain can reduce symptoms of Major Depressive Disorder. Although SSRI's are not always helpful, it is just one of the medications health professionals can try to help reduce symptoms of MDD.

Subject: Psychology

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Question:

What does catatonia mean?

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Kelly S.
Answer:

Catatonia is a group of symptoms characterized by abnormal psychomotor function such as immobility, muscle rigidity, restlessness, inability to communicate, or extreme physical agitation. Catatonia is usually associated with individuals who have Schizophrenia.

Subject: Anatomy

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Question:

Please describe the 2 components of the middle ear, and how they contribute to transmitting sound.

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Kelly S.
Answer:

The middle ear consists of 2 main components: the tympanic membrane (otherwise known as the eardrum), and the ossicles. When a sound wave enters the inner ear, it hits the tympanic membrane, causing this structure to begin to shake or vibrate. The tympanic membrane is connected to three small pieces of bone, called the ossicles. Therefore, when the tympanic membrane begins shaking, it causes the ossicles to begin shaking as well. There are three ossicles, the malleus, incus and stapes. They are organized in the ear with the malleus first (closest to the tympanic membrane), the incus second, and the stapes last (furthest from the tympanic membrane). Sound waves travel by first shaking the tympanic membrane, then the malleus, then the incus, and finally the stapes. I would compare this to a stack of falling dominoes - once one component of the middle ear begins shaking, the next one does as well and so on and so on. To summarize, the 2 components of the middle ear are the tympanic membrane and the ossicles, which are comprised of the malleus, incus and stapes. These structures contribute to transmitting sound by passing along sound vibrations, from the tympanic membrane to the ossicles and eventually to the inner ear.

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