Name: hormone imbalances and their effects
Uploaded: 2024-10-24T14:03:06.000Z
Duration: 1 min 27 s
Channel: JoVE

호르몬은 신체의 복잡한 과정을 조정하는 화학적 전달자입니다.
옥시토신은 시상하부에서 합성되고 뇌하수체에서 분비되어 신뢰, 공감 및 연결의 감정을 촉진하여 유대감과 사회적 상호 작용을 촉진합니다.
스트레스 호르몬인 코르티솔은 부신에서 생성됩니다. 에너지를 위해 혈당 수치를 높이고 스트레스를 관리하며 혈압을 조절합니다.
아드레날린으로도 알려진 에피네프린은 스트레스를 받을 때 분비됩니다. 심장 박동을 가속화하고, 기도를 확장하고, 에너지를 높여 신체가 위협에 빠르게 반응할 수 있도록 준비시킵니다.
에스트로겐은 여성의 생식 건강에 필수적입니다. 생리 주기를 조절하고 생식 발달을 도우며 골밀도, 피부 건강 및 콜레스테롤 관리에 영향을 미칩니다.
주로 남성 호르몬인 테스토스테론은 생식 조직의 발달에 필수적이며, 근육과 뼈 질량을 향상시키고, 체모 성장을 촉진하고, 성욕과 기분 안정성에 영향을 미칩니다.
마지막으로, 갑상선에서 생성되는 티록신은 신진대사와 에너지 관리에 필수적입니다. 이는 심박수, 소화, 뇌 발달 및 뼈 건강에 영향을 미칩니다.

주요 호르몬과 그 기능

호르몬은 내분비선에서 생성되는 생화학적 메신저로, 신체 기능을 조절하고 항상성을 유지하는 데 핵심적입니다. 각 호르몬의 균형은 중요합니다. 불균형은 심각한 생리적 혼란으로 이어질 수 있습니다. 주요 호르몬에는 옥시토신, 코르티솔, 에피네프린, 에스트로겐, 테스토스테론, 티록신, 성장 호르몬, 인슐린, 글루카곤이 있습니다.

시상하부에서 생성되고 뇌하수체에서 분비되는 옥시토신은 사회적 유대감, 출산, 수유에 역할을 합니다. 옥시토신의 분비 감소는 사회적 상호작용과 스트레스 반응을 방해하여 우울증과 같은 상태에 기여할 수 있습니다. 옥시토신의 과다 분비는 덜 흔하지만 출산 중 수축을 과장하거나 모유 수유 중 과활성적인 모유 배출 반사를 일으킬 수 있습니다.

부신에서 분비되는 코르티솔은 스트레스, 신진대사, 면역 반응을 조절합니다. 코르티솔의 저분비는 피로와 근육 약화로 나타나는 애디슨병을 유발하는 반면, 과분비는 비만, 고혈압, 고혈당 수치를 특징으로 하는 쿠싱 증후군으로 이어집니다.

부신에서도 분비되는 에피네프린은 스트레스에 반응하여 심박수와 에너지 생산을 증가시킵니다. 에피네프린의 분비 감소는 스트레스 반응을 둔화시켜 급성 상황에서 생존을 위협할 수 있으며, 과다 분비는 만성 불안과 심장 질환과 같은 지속적인 스트레스 증상을 유발할 수 있습니다.

주로 난소에서 생성되는 에스트로겐은 여성 생식 건강에 필수적이며, 월경 주기, 뼈 밀도, 콜레스테롤 수치에 영향을 미칩니다. 에스트로겐이 정상보다 낮은 수치로 분비되면 월경 불순과 뼈 밀도 감소로 인한 골다공증 위험이 증가할 수 있습니다. 반면, 에스트로겐의 과다 분비는 유방암과 자궁암의 위험 증가와 관련이 있으며, 이는 세포 성장과 복제에서 호르몬의 중요하면서도 섬세한 역할을 반영합니다.

주로 고환에서 생성되는 테스토스테론은 남성 생식 조직, 근육 및 뼈 질량, 체모 성장과 관련이 있습니다. 테스토스테론의 저분비는 근육량 감소, 성 기능 장애, 뼈 밀도 감소를 초래할 수 있으며, 종종 골다공증으로 이어질 수 있습니다. 더욱이 기분 안정성에 영향을 미쳐 우울증 증상으로 이어질 수 있습니다. 반면, 과도한 테스토스테론 생성이나 과분비는 개인을 전립선 비대와 같은 상태에 취약하게 만들 수 있으며 공격성과 기분 장애 증가와 관련이 있습니다.

목에 위치한 갑상선은 신진대사, 성장, 발달을 조절하는 티록신을 분비합니다. 갑상선 기능 저하는 티록신 분비 감소로 인해 발생하여 신진대사를 늦추고 체중 증가와 무기력함을 유발합니다. 반면 과다 분비는 신진대사 증가, 체중 감소, 긴장감이 특징인 갑상선 기능 항진증으로 이어집니다.

뇌하수체의 또 다른 산물인 성장 호르몬은 성장과 신진대사를 조절합니다. 어린이의 이 호르몬 분비 부족은 성장 부전과 키가 작은 상태로 이어지고, 과다 분비는 거대증이나 말단비대증으로 이어질 수 있으며, 이는 뼈가 비정상적으로 커지는 것입니다.

췌장에서 분비되는 인슐린과 글루카곤은 함께 작용하여 혈당 수치를 조절합니다. 인슐린 결핍이나 저항은 고혈당 수치를 특징으로 하는 당뇨병을 초래하는 반면, 과도한 인슐린은 저혈당으로 이어져 뇌 손상 및 발작과 같은 위험을 초래합니다.

송과선 호르몬은 일반적으로 멜라토닌으로 알려져 있으며, 뇌의 중심부 근처에 위치한 작은 내분비선인 송과선에서 생성됩니다. 멜라토닌은 신체의 일주기 리듬을 조절하고 수면-각성 주기와 계절적 생물학적 리듬에 영향을 미치는 데 중요합니다. 또한 기분과 면역 체계 성능의 조절을 포함한 다양한 생물학적 기능에 관여합니다. 멜라토닌의 분비 감소는 불면증과 같은 수면 장애로 이어질 수 있으며 계절성 정서 장애(SAD) 및 특정 유형의 우울증 증상에 영향을 미칠 수 있습니다. 반대로 멜라토닌의 과다 분비는 덜 흔하지만 과도한 졸음과 일주기 리듬의 혼란을 초래하여 인지 기능과 기분 안정성에 영향을 미칠 수 있습니다. 두 가지 상태 모두 최적의 건강을 유지하기 위해 균형 잡힌 멜라토닌 수치의 중요성을 강조합니다.

호르몬은 신체의 복잡한 과정을 조정하는 화학적 전달자입니다.
옥시토신은 시상하부에서 합성되어 ...

Education

교육

JoVE Core

Introduction to Psychology

심리학 개론

Unit 1

제1단원

Biopsychology

생물심리학

KEY TERMS AND CONCEPTS

주요 용어 및 개념

Major Hormones and Their Functions

hormone imbalances and their effects

Hormones are chemical messengers made by endocrine glands. They help control body functions and keep internal conditions stable. When hormone levels shift too far up or down, normal body processes can be disrupted.

Several major hormones have clear roles in the body. Oxytocin is made in the hypothalamus and released by the pituitary gland. It supports social bonding, childbirth, and lactation. Low oxytocin can affect social interaction and stress response, and it may contribute to depression. High levels are less common, but they can intensify childbirth contractions or cause a strong milk ejection reflex during breastfeeding.

Cortisol and epinephrine are secreted by the adrenal glands and help the body respond to stress. Cortisol also helps regulate metabolism and immune responses. Too little cortisol can cause Addison's disease, with fatigue and muscle weakness. Too much cortisol can lead to Cushing's syndrome, which is linked to obesity, hypertension, and high blood sugar. Epinephrine raises heart rate and energy production during stress. Low epinephrine can weaken the stress response in acute danger, while high levels may cause chronic anxiety and cardiac distress.

Estrogen and testosterone are sex hormones with wider effects beyond reproduction. Estrogen is mainly produced by the ovaries and supports the menstrual cycle, bone density, and cholesterol levels. Low estrogen can cause menstrual irregularities and raise the risk of osteoporosis because bone density drops. High estrogen is linked with a higher risk of breast and uterine cancers. Testosterone is mainly produced by the testes and supports male reproductive tissues, muscle mass, bone mass, and body hair growth. Low testosterone can reduce muscle mass, impair sexual function, lower bone density, and affect mood. High testosterone may be linked to prostate enlargement, increased aggression, and mood changes.

Thyroxine, growth hormone, insulin, glucagon, and melatonin also play key roles. The thyroid gland in the neck secretes thyroxine, which controls metabolism, growth, and development. Too little thyroxine slows metabolism and can cause hypothyroidism, weight gain, and lethargy. Too much causes hyperthyroidism, with weight loss and nervousness. Growth hormone from the pituitary gland helps regulate growth and metabolism. Low levels in children can cause growth failure and short stature, while high levels can lead to gigantism or acromegaly, where bones grow abnormally large.

The pancreas secretes insulin and glucagon to manage blood glucose. Insulin deficiency or resistance can cause diabetes mellitus, a condition marked by high blood sugar. Too much insulin can cause hypoglycemia, which may lead to brain damage and seizures. The pineal gland makes melatonin, which helps regulate circadian rhythms, including sleep-wake cycles and seasonal patterns. Melatonin also affects mood and immune system performance. Low melatonin can contribute to insomnia, seasonal affective disorder, and some types of depression. High melatonin is less common, but it can cause excessive sleepiness, disrupt circadian rhythm, and affect cognition and mood stability.

Hormone Imbalances and Their Effects

introduction to biological bases of psychology

introduction-to-biological-bases-of-psychology

Biological Factors Shaping Behavior and Mind

Biopsychology connects biology and psychology by showing how the body influences behavior and mental processes. It focuses on the nervous system, neurotransmitters, hormones, genetics, and evolutionary ideas. Together, these areas help explain why people think, feel, and act the way they do. The nervous system is the main foundation of biopsychology. It has two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS includes the brain and spinal cord and...

nervous system

Nervous System: CNS, PNS, and Reflexes

The nervous system helps the body sense, move, and respond. It works through a network of nerve cells that carry signals around the body. This system has two main parts: the central nervous system and the peripheral nervous system. The central nervous system, or CNS, includes the brain and spinal cord. The brain acts as the body’s control center. It processes sensory information and helps coordinate responses. The spinal cord serves as a major pathway for signals between the brain and the rest...

neurons as communicators of the brain

Neuron Parts and Signal Transmission

Neurons are the cells that carry information through the brain and nervous system. They use electrical and chemical signals to help control body functions, from heartbeat regulation to complex thinking. Their structure is built for fast, efficient communication. The cell body, or soma, is the neuron’s control center. It contains the nucleus, which holds the cell’s genetic material and helps maintain the neuron’s health and function. The cytoplasm around it contains organelles that make...

neuronal communication

How Neurons Send Signals

Neurons send signals through electrochemical communication that supports brain and nervous system function. A key part of this process is the action potential, a rapid electrical change that starts when the neuron’s internal charge rises above a threshold. That signal then travels along the axon to the axon terminal, where it is ready to pass to another neuron. The connection point between two neurons is called a synapse. Synapses can be electrical or chemical, and each type moves information...

neurotransmitters

Brain Chemicals That Shape Mood and Movement

Neurotransmitters are chemical messengers that help neurons communicate. They play a major role in nervous system function, as well as in mood, movement, sleep, and social behavior. Serotonin is made in the brain and intestines. It is linked to well-being and happiness, and it helps regulate mood, appetite, and sleep. When serotonin levels are out of balance in the brain or in peripheral sites, depression and sleep problems can occur. Dopamine is produced in several brain areas, including the...

cerebral hemispheres

How the Brain’s Two Halves Work

The brain’s two cerebral hemispheres work together to process information and control the body. The left and right hemispheres are linked by the corpus callosum, a large bundle of nerve fibers. This connection lets the two sides share sensory and motor information, with each hemisphere controlling the opposite side of the body. The hemispheres are also specialized for different tasks. This is called lateralization, which means certain functions are handled more strongly by one side than the...

lobes of the cerebrum

How Brain Lobes Shape Perception

The cerebral cortex is divided into two hemispheres, and each hemisphere has four lobes: frontal, parietal, temporal, and occipital. Together, these lobes support the brain’s main cognitive and sensory jobs. They work as a team to help you think, feel, move, and respond to the world. The frontal lobe sits behind the forehead and acts as a control center for personality, intelligence, and voluntary muscle movement. It also contains the prefrontal cortex, a region that helps with planning,...

spinal cord

Spinal Cord Nerves and Reflexes

The spinal cord is a major part of the central nervous system. It runs from the base of the brainstem to the lumbar region of the vertebral column. It helps keep the body stable and carries signals between the brain and the rest of the body. The spinal cord sits inside the bony spine for protection. It is divided into 30 segments that match the vertebrae. Each segment connects to a specific body region through paired spinal nerves. These spinal nerves are grouped by where they leave the...

lateralization

Brain Hemisphere Specialization

Brain hemisphere specialization divides mental tasks between the left and right sides of the brain. This split can improve neural efficiency and support more complex human abilities. Each hemisphere tends to handle the work it does best, which helps cognitive processing run more smoothly. The left hemisphere is especially strong in logic and language-related tasks. It supports analytical thinking, which means breaking a problem into parts and solving it step by step. This is important for...

human genetics

Genes, Behavior, and Mental Health

Human genetics explains how genes can influence behavior, emotions, and mental health. It also shows how a person’s genetic code can shape physical traits and the risk of disease. Each individual carries a unique set of genes, so the effects can be subtle or more noticeable. Genes help direct how the brain, hormones, and cells work. These body systems are all shaped by genetic instructions, and they help produce differences in thoughts and behavior. Human genetics therefore links biology with...

genetic material

Chromosomes, DNA, and Inherited Traits

Chromosomes, DNA, and inherited traits explain how genetic information is organized in the human body. Each cell contains a nucleus, and the nucleus holds 46 chromosomes arranged in 23 pairs. These chromosomes are tightly coiled structures made of DNA, which carries the instructions passed from parents to offspring. An individual inherits one set of chromosomes from the mother through the egg and one set from the father through the sperm. This combination creates a unique genetic makeup. Of...

genetic variation

How Alleles Shape Inherited Traits

Genetic variation helps explain why individuals in the same species can look and act differently. It comes from differences in DNA sequences. This diversity matters because it helps a species survive and adapt when the environment changes. Variation starts at fertilization, when an egg and sperm cell join. Each of these cells carries 23 chromosomes, so the fertilized egg can have up to 46 chromosomes. Chromosomes are long DNA strands that contain genes, which are the basic units of heredity. <br...

behavioral genetics and its designs

How Behavior Genetics Studies Inheritance

Behavior genetics studies how inherited genes influence human behavior. It looks at how genes passed from parents to offspring help shape behavioral traits and tendencies. The field also examines how inherited factors and environmental influences work together. Researchers use family studies, twin studies, and adoption studies to separate genetic and environmental effects. Family studies track traits within biological families to find possible genetic patterns. They have helped identify...

organization of the brain

Brain Regions and Their Key Functions

The brain is the main control center of the nervous system. It processes sensory input, makes decisions, and directs body actions. Its structure is divided into the hindbrain, midbrain, and forebrain, and each part supports important functions. The hindbrain sits at the base of the brain. It helps regulate automatic life processes. The medulla oblongata controls involuntary functions such as heartbeat, breathing, and blood pressure. Nearby, the pons acts as a bridge between brain regions,...

evolutionary psychology

Evolutionary Psychology and Human Behavior

Evolutionary psychology explains human behavior and mental processes through natural selection. It uses Darwin’s idea that traits can spread when they help survival and reproduction. In this view, some common behaviors may be adaptations that were useful to our ancestors. One clear example is fear of snakes. This fear is nearly universal, which suggests that early humans who avoided snakes were more likely to survive deadly encounters. Over many generations, that caution could be passed on and...

neuroplasticity

How the Brain Rewires Itself

Neuroplasticity is the brain’s ability to change its structure and function in response to learning, experience, or injury. It allows neural circuits to reorganize over time. This flexibility supports lifelong development and adaptation. One part of this change begins when dendrites and axons grow. Dendrites receive signals, and axons send them. As they grow, the brain’s circuitry becomes more complex and can support more connections. Next, synaptogenesis occurs. Synaptogenesis is the...

brain imaging

Brain Scanning Techniques

Brain scanning techniques help scientists and doctors see the structure and activity of the human brain. These methods support the diagnosis, study, and treatment of neurological and psychiatric disorders. The main techniques include computerized axial tomography, or CT, positron-emission tomography, or PET, magnetic resonance imaging, or MRI, functional magnetic resonance imaging, or fMRI, and transcranial magnetic stimulation, or TMS. CT scans use X-ray technology to build detailed...

the endocrine system

Endocrine Glands and Hormone Signals

The endocrine system is a network of glands that send hormone signals through the body. Hormones are chemical messengers that help control many body functions. They enter the bloodstream and travel to cells with the right receptors, or target sites, so the signal can be received. Because of this, hormone effects are widespread, unlike the more localized effects of neurotransmitters. This signaling helps the body keep a stable internal environment, called homeostasis. Several major glands...

somatosensory, motor, and association cortex

somatosensory-motor-and-association-cortex

Brain Cortex Areas for Sensation and Movement

The brain cortex uses separate areas for sensation, movement, and higher thinking. The somatosensory cortex is in the parietal lobes. It helps the brain interpret touch, temperature, and proprioception, which is awareness of body position. The somatosensory cortex has an organized map of the body. Neurons at the top of this region mainly process signals from the lower body. Neurons at the bottom handle input from the upper body. This layout helps the brain locate sensory input with precision.

major hormones and their functions

Hormones are chemical messengers made by endocrine glands. They help control body functions and keep internal conditions stable. When hormone levels shift too far up or down, normal body processes can be disrupted. Several major hormones have clear roles in the body. Oxytocin is made in the hypothalamus and released by the pituitary gland. It supports social bonding, childbirth, and lactation. Low oxytocin can affect social interaction and stress response, and it may contribute to depression.

inheritance

Genes, Traits, and Mendel's Rules

Genes, traits, and Mendel's rules explain how characteristics pass from parents to offspring. Gregor Mendel's pea plant experiments changed how scientists understand heredity. His work showed that traits are controlled by discrete units inside organisms called genes. Genes usually come in pairs. One gene is inherited from each parent, and together they make a person's genotype. Genotype is the genetic blueprint for potential traits. Examples include blood type, eye color, and inherited...

gene-environment interactions

How Environment Shapes Gene Expression

Environmental factors can change how genes are expressed. Gene expression is a dynamic process, and traits can differ even in people with the same DNA. Radiation, temperature, behavior, nutrition, and stress all help shape the final outcome. The reaction range helps explain this process. It means genes set a possible range for a trait, while the environment helps decide where a person falls within that range. For example, genetics may allow a height range from 5'5" to 6'1", but nutrition,...

heritability

Heritability and the Environment

Heritability describes how genetic differences contribute to trait variation in a population. It is a statistical measure, so it shows how much of the spread in a trait can be linked to genes across a group. It does not tell you how “genetic” a trait is in an individual person. Heritability is usually expressed as a percentage. That percentage can change depending on which population is studied and what environmental conditions are present. This means heritability is context-dependent, not...

natural selection and adaptation

Adaptation in Changing Environments

Natural selection explains how organisms become better suited to their environments over time. It favors individuals with traits that improve survival and reproduction. Adaptation is the result. It includes genetic changes that help an organism function in specific conditions, such as extreme cold or thinner air at high altitudes. Adaptation is not only physical. Psychological adaptation also helps organisms, especially humans, succeed in their surroundings. These responses come from both...

natural selection and mating preferences

How Selection Shapes Mate Choice

Natural selection and mating preferences work together to shape how organisms survive and reproduce. Natural selection favors traits that help an organism fit its environment. Mating preferences are part of sexual selection, which influences who mates with whom and how genes are passed on. Evolutionary psychologists argue that these preferences are tied to instincts that support reproduction. For females, conception, pregnancy, and nursing create a strong need to choose mates who can offer...

criticisms of the evolutionary perspective

criticisms-of-the-evolutionary-perspective

Social Learning vs. Evolutionary Psychology

Social learning theory and evolutionary psychology offer two different ways to explain sexual behavior. A study in which strangers gave students compliments and then asked for casual sex showed a clear gender gap. None of the women said yes, while 70% of the men agreed. Evolutionary psychology explains this result by arguing that natural selection may have shaped women to be more selective about sexual partners. From this view, selectivity can help improve survival and reproductive success. It...

key terms and concepts

Explore major hormones, including cortisol, estrogen, insulin, and melatonin, and see how too much or too little can affect growth, stress, sleep, and blood sugar.

Hormone Imbalances and Their Effects | JoVE K12

JoVE Core Introduction to Psychology offers an engaging learning experience on the fundamental principles of psychology through concise video lessons. Students will explore important topics such as cognitive processes, emotional regulation, and neural mechanisms, establishing a strong foundation in the study of the mind and human behavior. This series provides an accessible and captivating approach to grasp the essential concepts of the discipline.

introduction to psychology

Hormone Imbalances and Their Effects

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