Extra Question Chapter 1:Chemical Reaction And Equations
Extra Question II Chapter 1:Chemical Reaction And Equations
Extra Question Chapter 2:Acid Ans Base
Important Question Chapter 3:Metal and Non Metal
Chapter 4:Carbon And Its Compoundl
Chapter 5:Periodic Classification of elememt
Chapter 7:Control and coordination
Chapter 8:How Do Organisms Reproduce?
Chapter 9:Hearedity And Evolution
Chapter 10:Light Reflection and Refraction
Chapter 11:The Human Eye and Colorful World
In living organisms, two systems are dominant and unified: the nervous system and the endocrine system. Control is the ability to influence or determine the sequence of actions or events in a system, while the hierarchy of a system is the structure and action of the components in a complex body and for they have been able to work well together
The central nervous system plays an important role in the control and coordination of bodily functions. It helps to transmit signals from one part of the body to another, thus helping to respond quickly to stimuli. It helps to regulate and coordinate the functions of body parts.
Reflex pressure is a neural pathway that regulates reflex activity. For example, if we accidentally touch something hot, we immediately withdraw our hands. This immediate response is an example of cognitive pressure.
Neural tubes are muscle cells, the main building blocks of muscles. It consists of cell bodies, dendrites, and axons. The primary function of the nervous system is to transmit information to nerve cells, muscles, or other tissues.
Hormones are chemical messengers produced in the endocrine glands in the body. They travel through the bloodstream to tissues or organs. They are slow acting and affect a wide range of processes, such as growth and development, metabolism, sexual function, mood, etc. Examples include insulin, adrenaline, estrogen, and testosterone
The human brain is the controller of the body. It consists of three parts: brain, brain, and brain stem. The brain controls voluntary actions, speech, emotions, etc. The brain regulates muscle movement, posture and balance. The brainstem controls involuntary behaviors such as heart rate and blood pressure.
In humans, the endocrine system is a collection of glands that produce hormones. These hormones regulate metabolism, growth and development, neurological function, sexual function, reproduction, sleep, mood and more.
Photoproduction is how a plant grows in response to light, and geomorphology is how plants grow in response to gravity. In photosynthesis, the plant bends toward the light source, and in geology, roots grow downwards and branches grow upwards.
A synapse is a small channel at the end of a neuron that transmits a signal from one neuron to another. It plays an important role in neuronal function by transmitting signals between neurons.
Auxin is a type of plant hormone that plays an important role in plant growth. Cell expansion, bud formation, and branching are induced.
Voluntary actions are those we consciously control, such as walking, talking, writing, etc. Involuntary actions are those over which we have no conscious control, such as breathing, heartbeat, and so on.
There are three types of nerves: sensory nerves (transmit signals from the outside of your body to the central nervous system), motor nerves (transmit signals from the central nervous system to parts of your body a in the pelvis), internal nerves (connecting various elements) and nerves in the brain and spinal cord).
The spinal cord plays an important role in transmitting information from the brain to the rest of the body and vice versa. It also controls the rotation rate.
Our bodies respond to stimuli such as heat, light, and sound through our sensory organs. Skin feels warmth, eyes feel light, ears feel sound.
The hypothalamus is a part of the brain that plays an important role in regulating body temperature, thirst, hunger, other homeostatic systems, and emotional responses
In plants, growth, development, and response to the environment are coordinated by chemicals such as plant hormones. They regulate crop growth rate and affect crop yields.
A nerve cell, also known as a neuron, is the primary conductor of electricity in the nervous system. Structure: A neuron has three main parts: Cell body: This is the central portion of the tissue, which contains the nucleus and other cell organelles. It is responsible for normal muscle function and maintenance. Dendrites: These are small branches that extend from the cell body. Sensations are received and transmitted to the cell body. Axon: This is a long rod-shaped extension that carries impulses from the cell body to other tissues or motor components such as muscles or nerves. The axon is coated with a myelin sheath that acts as a protective layer and increases the velocity of impulse transmission. Function: The primary function of nerve cells or nerves is to transmit information in the form of electrical signals or sensations from one part of the body to another, helping to coordinate and control body functions and functions. For example, sensory neurons carry information from sensory neurons (such as touching our skin or heat on our skin) to those of the brain and spinal cord The sensory nervous system signals travel from the brain and spinal cord to nerves or nerves, allowing us to respond to changes in our skin .
cerebrum, cerebellum, and Medulla There are three main parts of the brain, each with a specific function. cerebrum: It is the largest part of the brain and is divided into two parts. It regulates higher brain function, including, and generally, complex behaviors such as interpreting sensory information, learning and understanding, voluntary movements, reasoning, reading, writing, and emotions , the right hemisphere is responsible for creativity, spatial abilities, artistic and musical skills. The left hemisphere controls logic, language, reasoning, and mathematical abilities. Cerebellum: The cerebellum, located at the base of the brainstem at the back of the brain, regulates voluntary motor activity. It controls our balance, coordination and posture, ensuring that all our movements are smooth and precise. The brain also plays a role in motor skills, such as learning to ride a bike or learning another dance. Medulla: The medulla, also known as the medulla oblongata, is located in the lower part of the brain, just above the spinal cord. It controls many vital automated processes, including heart rate, blood pressure, and respiration. It also controls certain reactions such as coughing, sneezing and swallowing.
The human ear is a complex organ that performs two main functions: hearing and maintaining balance or equilibrium. The external ear, the middle ear and the inner ear are divided into three parts. External ear: The pinna (the part of the ear you can see) and the external ear are located. The pinna collects sound waves and directs them to the ear canal. These sound waves then descend through the auditory meatus to the eardrum. Middle ear: The middle ear begins in the eardrum (also known as the tympanic membrane), which is a thin cone that vibrates as sound waves enter it. The middle ear also contains three small bones called osteoblasts: malleus (rope), . the incus (the anvil), and the stapes (the bump). f. These bones amplify sound waves and transmit them to the inner ear. Inner ear: The inner ear contains the cochlea and vestibular system. The cochlea is a spiral organ that converts vibrations from bones into electrical signals. These signals are then sent to the brain via the auditory nerve. A vestibular system of three semicircular canals and the vestibule control balance. Functions of the ear: Ear: The ear converts sound waves into electrical signals that can be interpreted by the brain. This affects the outer, middle and inner ears. Balance: The ears also play an important role in balancing. Semi-circular tubes, water and fine hair-like follicles with inner ears and a vestibule to help position and balance the head
Often referred to as the "master gland," the pituitary gland plays an important role in the human body as it regulates many other endocrine glands. It is a small, pea-sized tube at the base of the brain. The pituitary gland is divided into anterior and posterior pituitary glands, each secreting specific hormones that fulfill different functions Anterior Pituitary: Produces and secretes many hormones, e.g. i)Growth Hormone (GH): Stimulates growth and cell reproduction in the body. ii)Thyroid-stimulating hormone (TSH): Stimulates the thyroid gland to produce thyroid hormone. iii)Adrenocorticotropic hormone (ACTH): Stimulates the adrenal glands to produce cortisol. iv)Prolactin: Stimulates milk production in women. v)Follicle-stimulating hormone (FSH) and luteinizing hormone (LH): These hormones regulate sexual function and fertility in both sexes. Posterior pituitary: Stores and releases hormones produced in the hypothalamus, e.g. Antidiuretic hormone (ADH): Regulates fluid balance in the body. Oxytocin: Stimulates uterine contractions and milk production during labor in lactating women. In summary, the pituitary gland plays an important role in growth, metabolism, energy levels, stress response, reproduction, and many other vital bodily functions