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Sensory Receptors – Definition, Types, Mechanism, Functions

Sensory Receptors - Definition, Types, Mechanism, Functions

What is Sensory Receptor? Definition of Sensory Receptor A sensory receptor is a structure or specialized cell that detects and responds to physical stimuli in the environment, both internally and externally. It converts these stimuli into electrical signals that are transmitted to the central nervous system for processing and perception. How Sensory Systems Work? Classification … Read more

Cranial Nerves in Mammals – Definition, Types, Structure, Functions

Cranial Nerves in Mammals - Definition, Types, Structure, Functions

What is Cranial nerve? Definition of Cranial nerve Cranial nerves are a set of twelve pairs of nerves that emerge directly from the brain and are responsible for controlling various functions in the head, neck, and some organs in the chest and abdomen. These nerves transmit sensory information, such as sight, hearing, taste, and touch, … Read more

Human Brain – Definition, Structure, Characteristics, Functions

Human Brain - Definition, Structure, Characteristics, Functions

What is Human Brain? Definition of Brain The brain is the central organ of the human nervous system, responsible for processing information, controlling bodily functions, and facilitating cognition, emotions, and behaviors. Characterisitcs Features of Human Brain The human brain possesses several characteristic features that contribute to its complexity and functionality. Here are some key characteristics … Read more

Autonomic nervous system – Definition, Structure, Functions

Autonomic nervous system - Definition, Structure, Functions

What is Autonomic nervous system? Definition of Autonomic nervous system The autonomic nervous system (ANS) is a division of the nervous system responsible for regulating involuntary bodily functions such as heart rate, digestion, respiration, and sexual arousal. It consists of the sympathetic, parasympathetic, and enteric divisions, which work together to maintain homeostasis and respond to … Read more

Urinary System – Definition, Anatomy and Physiology

Urinary System - Definition, Anatomy and Physiology

What is Urinary System? Definition of Urinary System The urinary system is a collection of organs, including the kidneys, ureters, bladder, and urethra, that work together to eliminate waste from the body, regulate fluid balance, and maintain the chemical stability of the body. Anatomy of the Urinary System Two kidneys, two ureters, a urinary bladder, … Read more

Skeletal System – Definition, Types, Anatomy, Functions

Skeletal System - Definition, Types, Anatomy, Functions

What is Skeletal system? Definition of Skeletal system The skeletal system is the framework of bones, joints, and cartilages that provides support, protection, and facilitates movement in the human body. Types of Skeletal Systems There are three main types of skeletal systems found in different organisms: hydrostatic skeleton, exoskeleton, and endoskeleton. Each type of skeletal … Read more

Hypothalamus – Definition, Structure, Functions

Hypothalamus

What is Hypothalamus? Definition of Hypothalamus The hypothalamus is a small region of the brain located below the thalamus. It serves as a crucial link between the nervous system and the endocrine system, regulating various metabolic processes and controlling activities such as body temperature, hunger, thirst, sleep, and emotional behavior. Embryological development of the hypothalamus … Read more

Signal Transduction Pathway – Definition, Types, Functions, Examples

Signal Transduction Pathway - Definition, Types, Functions, Examples

What is a Signal Transduction Pathway? Definition of Signal Transduction Pathway A signal transduction pathway is a series of molecular events inside a cell that converts an external signal into a specific cellular response. Components of signal transduction Signal transduction involves several key components that are common in both plants and animals. These components include: … Read more

Hormone – Definition, Structure, Types, Functions, Examples

Hormone - Definition, Structure, Types, Functions, Examples

What is Hormone? Endocrine Glands and Their Major Hormones Endocrine gland Associated hormones Chemical class Effect Pituitary (anterior) Growth hormone (GH) Peptide Promotes growth of body tissues Pituitary (anterior) Prolactin (PRL) Peptide Promotes milk production Pituitary (anterior) Thyroid-stimulating hormone (TSH) Peptide Stimulates thyroid hormone release Pituitary (anterior) Adrenocorticotropic hormone (ACTH) Peptide Stimulates hormone release by … Read more

Endocrine System – Definition, Classification, Functions and Endocrine glands

Endocrine System - Definition, Classification, Functions and Endocrine glands

What is Endocrine System? Definition of Endocrine System The endocrine system is a network of glands that release hormones into the bloodstream to regulate various functions and maintain balance within the body. Structure of Endocrine System Development of Endocrine Gland Classification of Endocrine Glands The classification of endocrine glands can be based on different criteria, … Read more

Puberty – Definition, Importance, Changes in Male and Female

Puberty - Definition, Importance, Changes in Male and Female

What is Puberty? Definition of Puberty Puberty is the natural process of physical changes during which a child’s body develops into an adult body capable of sexual reproduction. Effects of early and late puberty onset The effects of early and late puberty onset can have significant implications for both girls and boys. Here’s a breakdown … Read more

Characteristics of Muscle Twitch – Motor Unit, Summation and Tetanus

Characteristics of Muscle Twitch - Motor Unit, Summation and Tetanus

Muscle twitch, the brief and transient contraction of a muscle fiber, is a fundamental event in muscle physiology. Understanding the characteristics of muscle twitches provides insights into the intricate mechanisms that govern muscle function. This article delves into the key aspects of muscle twitch, focusing on motor units, summation, and tetanus. Muscle twitches are initiated … Read more

Ultra structure of skeletal muscle – Definition, Functions

Ultra structure of skeletal muscle - Definition, Functions

What is skeletal muscle? Definition of skeletal muscle Skeletal muscle is a type of voluntary muscle tissue that is attached to the bones and responsible for movement and various bodily functions. Properties Of Skeletal Muscle Skeletal muscles possess several important properties that contribute to their function and enable them to perform various tasks: These properties … Read more

Reflex Action – Definition, Types, Mechanism & Examples

Reflex Action - Definition, Types, Mechanism & Examples

What is Reflex Action? Definition of Reflex Action Reflex action is an automatic and rapid response to a stimulus that occurs without conscious control or thought. It involves the activation of sensory neurons, interneurons, and motor neurons to produce a quick and stereotyped response, often for the purpose of self-preservation or protection. Types of reflex … Read more

Neuromuscular Junction – Definition, Structure, Steps, Significance

Neuromuscular Junction - Definition, Structure, Steps, Significance

What is Neuromuscular junction? Definition of Neuromuscular junction A neuromuscular junction is a specialized connection between a motor neuron and a muscle fiber, where signals from the nervous system are transmitted to the muscle, resulting in muscle contraction. Structure of a Neuromuscular Junction The structure of Neuromuscular junction can be broadly divided into three parts: … Read more

Synapse – Definition, Parts, Types & Function

Synapse - Definition, Parts, Types & Function

What is Synapse? Definition of Synapse A synapse is a junction or connection between two neurons or a neuron and a target cell, allowing the transmission of electrical or chemical signals. Synapse and Neurotransmitters Synapses and neurotransmitters play a crucial role in neuronal communication. Neurotransmitters are chemicals that are released from neurons in response to … Read more

How Neurons Communicate – Resting membrane potential

How Neurons Communicate - Resting membrane potential

The nervous system relies on neurons to carry out various functions, ranging from basic motor reflexes to complex processes such as memory formation and decision-making. Unlike human communication through words and body language, neurons communicate through electrical and chemical signals. Similar to a committee member, a single neuron typically integrates and processes information from multiple … Read more

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