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Questions and Answers
Centre for hunger is situated in the ______.
Fore-Brain
The main coordinating centre of the body is the ______.
Brain
During ______ response is generated from spinal cord.
reflex
Goiter is caused due to deficiency of ______.
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Cranial nerves arise from the ______.
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Stress hormone in plants is ______ and in animals is ______.
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The basic structural and functional unit of the nervous system is the ______.
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In reflex arc, response is generated from the ______.
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Which part of the brain is primarily responsible for the center of hunger?
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The brain is not the main coordinating center of the body.
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What are the two parts of the human nervous system?
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In a neuron, the impulse is converted into a chemical signal at the ______.
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Match the following reflex actions with their type:
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Which reflex action occurs due to immediate withdrawal from a heat source?
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Identify the process for which spinal cord directly generates a response.
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In a reflex arc, the response is generated from the brain.
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Study Notes
Human Brain
- The brain is the main coordinating centre of the body.
- The brain is responsible for coordinating all the functions of the body, including movement, sensation, and thought.
- The hindbrain is responsible for controlling the body's basic functions, such as breathing, heart rate, and blood pressure.
- The midbrain is responsible for coordinating movement and sensory information.
- The forebrain is responsible for higher-level functions, such as learning, memory, and emotions.
- Nerve impulses travel along the dendrite, then along the neuron, and finally reach the end point of the neuron.
Human Nervous System
- The human nervous system is divided into two parts: the central nervous system and the peripheral nervous system.
- The central nervous system consists of the brain and spinal cord.
- The peripheral nervous system consists of all the nerves that extend from the brain and spinal cord to the rest of the body.
- The basic structural and functional unit of the nervous system is the neuron.
- Neurons are responsible for transmitting information throughout the body.
- Neurons communicate with each other through chemical signals.
- Chemical signals are converted into electrical signals at the synapse, which is the junction between two neurons.
Reflex Actions
- A reflex action is a rapid, involuntary response to a stimulus.
- Reflex actions are generated from the spinal cord, not the brain.
- Reflex actions help to protect the body from harm.
Hormones
- Releasing hormones are produced in the hypothalamus, located in the midbrain and stimulate the pituitary gland to release hormones.
- Hormones are chemicals that regulate the body's functions.
- Hormones travel throughout the body in the bloodstream.
Disorders of the Nervous System
- Goiter is a disorder of the thyroid gland caused by a deficiency of iodine.
- Stress hormones in plants are called abscisic acid and in animals, the stress hormone is cortisol.
Human Actions
- Voluntary actions are actions that are consciously controlled, such as walking and speaking.
- Involuntary actions are actions that are not consciously controlled, such as breathing and heartbeat.
- Reflex actions are fast, involuntary responses to a stimulus.
Examples of Human Actions
- Breathing: Involuntary, essential for life
- Walking: Voluntary, controlled by the brain
- Speaking: Voluntary, controlled by the brain
- Blinking of eyes: Reflex action, protects eyes from dust and debris
- Vomiting: Involuntary, triggered by the nervous system
- Heartbeat: Involuntary, essential for life
- Withdrawal of hand on touching a heat object: Reflex action, protects the hand from burns.
Human Nervous System
- The hypothalamus is located in the midbrain and is responsible for stimulating the pituitary gland to release hormones.
- The centre for hunger is located in the forebrain.
- The brain is the main coordinating centre of the body.
- The dendrite receives information and the axon transmits information throughout the nervous system.
- Reflex actions are responses generated from the spinal cord.
- Goiter is caused by a deficiency of iodine.
- Cranial nerves arise from the brain.
- Abscisic acid is a stress hormone found in plants and cortisol is the stress hormone found in animals.
- Voluntary actions: Walking, speaking
- Involuntary actions: Respiration, heartbeat
- Reflex actions: Blinking of eyes, withdrawal of hand on touching a hot object, vomiting
- A neuron converts an impulse into a chemical signal for onward transmission at the synapse
- The two parts of the human nervous system are the central nervous system and the peripheral nervous system.
- The basic structural and functional unit of the nervous system is the neuron.
- Reflex actions are rapid responses to stimuli that are generated from the spinal cord.
- The spinal cord is involved in the reflex arc.
- The brain is not directly involved in the reflex action.
- The brain is responsible for conscious responses to stimuli.
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Description
Test your knowledge on the human brain and nervous system! This quiz covers key areas like the hindbrain, midbrain, and forebrain, along with an overview of the central and peripheral nervous systems. Dive into the fascinating world of how our body coordinates all functions through nerve impulses.
