Hjärnan Och NervSystemet

The correct answer is "Hjärnan och ryggmärgen." The central nervous system (CNS) consists of two main parts, the brain and the spinal cord. These two components work together to coordinate and control the body's functions. The brain is responsible for processing and interpreting sensory information, as well as coordinating motor functions and higher cognitive processes. The spinal cord acts as a pathway for nerve signals between the brain and the rest of the body, allowing for communication and control of bodily functions.

The correct answer is "Centrala och perifera nervsystemet" (Central and peripheral nervous system). The brain and nervous system are composed of two parts, the central nervous system which includes the brain and spinal cord, and the peripheral nervous system which includes all the nerves that extend from the central nervous system to the rest of the body.

The given answer "reflex, refleks" is correct because the statement describes a natural and automatic response to a touch near the mouth, where a newborn turns their head towards it, opens their mouth, and begins to suck for milk. This response is known as a reflex or "refleks" in Swedish.

The brain is divided into three different parts: the cerebrum (stora hjärnan), the cerebellum (lilla hjärnan), and the brainstem (hjärnstammen). The cerebrum is responsible for higher cognitive functions such as thinking, memory, and perception. The cerebellum controls motor coordination and balance. The brainstem connects the brain to the spinal cord and controls vital functions such as breathing, heart rate, and consciousness.

The three "samlingar av nervcellssnystan" that are being referred to in the question are the hypothalamus, amygdala, and hippocampus. The hypothalamus regulates various bodily functions such as body temperature, hunger, thirst, sexuality, and stress. It also controls the pituitary gland and the autonomic nervous system. The amygdala is responsible for emotions such as panic, anger, and fear. The hippocampus plays a crucial role in memory.

i genomsnitt 7 timmar per natt. Gärna 8. Ibland, nån enstaka gång 6 timmar. I rummet ska det vara svalt, mellan 14-18 grader (!) Ja, det låter kallt, men hellre pyjamas och varmt täcke i kallt rum än naken och svettig i för varmt rum - för sömnens bästa.

In the nervous system of children, signals are transmitted at a speed of approximately 100 m/s.

The correct answer is "att hålla kroppen i balans" (to maintain balance in the body). The explanation for this answer is that the cerebellum, which is located at the back of the brain, is responsible for coordinating and regulating movement and balance. It receives information from various sensory systems in the body and helps in maintaining posture, coordinating muscle movements, and ensuring smooth and balanced movements.

The brain receives information from the senses and controls almost everything that happens in the body. It also relies on various glands that produce hormones, which are chemical substances that travel through the blood and send messages to different parts of the body.

The correct answer is "styrning och reglering av mina inre organ, min andning, att mitt hjärta slår." The autonomic nervous system is responsible for controlling and regulating the internal organs, such as the heart, as well as functions like breathing. These are involuntary actions that are automatically controlled by the brain without conscious effort.

The correct answer is "hjärnbalken". The question is asking for the name of the part in the brain that connects the two halves of the brain. The term "hjärnbalken" refers to the corpus callosum, which is a thick band of nerve fibers that allows communication between the left and right hemispheres of the brain.

The correct answer is "synaps". A synapse is a junction between two nerve cells, where electrical or chemical signals are transmitted. The other variations provided in the answer choices are misspellings or variations of the correct term.

The given passage states that nerves in the nervous system can be divided into three types: inåtledande (sensory nerves), sammanbindande (connecting nerves), and utåtledande (motor nerves). It further mentions that one of these types constitutes 99% of all nerves. Therefore, the correct answer is "Sammanbindade" (connecting nerves) as they are the most abundant type of nerves in the nervous system.

The described gland is the hypofysen, also known as the hyppofysen. It is a gland in the brain that produces hormones to regulate other glands in the body when they are producing their own hormones. It is also responsible for producing growth hormone.

The correct answer is "den yttre hjärnbarken" because it is stated in the question that the outer part of the brain is called the "hjärnbark" and the inner, connected part is called the "hjärnbalk". Therefore, when choosing which part you think with, it would be the outer hjärnbark.

Nervceller är speciella eftersom de har ett långt utskott som används för att kommunicera med andra nerver. Detta utskott kallas axon och används för att skicka elektriska signaler till andra celler. Dessutom har nervceller en cellkärna som finns i en grå cellkropp. Denna cellkropp har också korta utskott som kallas dendriter och används för att ta emot information från andra celler. Det är dessa särskilda egenskaper hos nervceller som gör dem unika och skiljer dem från andra celltyper i kroppen.

The correct answer is the "sköldkörteln (vid struphuvudet)." This gland is responsible for producing hormones that regulate the body's metabolism. It is located near the throat, specifically around the area of the larynx or voice box. The hormones produced by the thyroid gland play a crucial role in controlling various bodily functions, including metabolism, growth, and development.

The correct answer is "en annan nervcell, en muskel, en körtel" because these are all examples of structures or organs that can receive and transmit information through a nerve fiber. Nerve cells, or neurons, are specialized cells that transmit signals to other neurons, muscles, or glands. Muscles receive signals from nerves to contract and produce movement. Glands receive signals from nerves to release hormones or other substances. Therefore, all three options listed are correct examples of structures that can receive and transmit information through a nerve fiber.

When the sympathetic nervous system takes over, it triggers a fight or flight response in the body. This response prepares the body for action in a high-stress situation. The pupils dilate to allow more light in for better vision, the digestive system slows down, leading to fewer stomach movements, the heart rate increases to pump more oxygenated blood to the muscles, and the breathing rate increases to supply more oxygen to the body.