Biology-Control & Co-ordination_ Nervous system_ Human Brain

Explore how cell surface receptors bind specific ligands to trigger signal transduction, open ion channels, and transfer signals between cells for coordinated body responses.

Classify receptors by location: extracellular (cell membrane) and intracellular (cytoplasmic or nuclear), plus visceral, proprioceptive, and tele receptors, with examples like G protein–coupled and tyrosine kinase receptors.

Explore sensory receptors in sense organs and their roles in vision, hearing, smell, taste, and equilibrium, including mechanical receptors, photoreceptors, thermal receptors, chemoreceptors, and nausea receptors.

Explore intracellular cytoplasmic and nuclear receptors and cell surface receptors, including ion channel link, G protein coupled, and enzyme link receptors, and how they transduce ligand signals into intracellular responses.

Explore how the nervous system coordinates body function through brain and spinal cord, with central and peripheral nervous systems, neurons, and nerves transmitting signals to and from the body.

Explore how nervous systems vary across organisms, from no system in sponges to diffuse nets in hydra and jellyfish, to more complex nervous systems in octopus and humans.

Analyze the central nervous system, brain and spinal cord as the control center, receiving data from the five sensory organs, processing it, and sending commands via the peripheral nervous system.

Explore how the peripheral nervous system links the central nervous system to the body via cranial and spinal nerves, and its somatic and autonomic divisions, including sympathetic, parasympathetic, and enteric.

Explore the nervous system's structure and roles, including the central and peripheral systems, somatic and autonomic divisions, and the sympathetic, parasympathetic, and enteric networks.

Identify the two nervous system cell types: neurons and glial cells. Neurons transfer information via electrochemical signaling in networks, shaping thinking, movement, and behavior; glial cells support and nourish them.

Explore neurons as the nervous system's units, with cell body, dendrites, and axon, and learn how synapses enable electrochemical signals, sensory and motor roles, and CNS vs PNS myelin sheath.

Understand glial cells as non neuronal support cells that nourish neurons and maintain homeostasis. See how CNS and PNS glia form myelin, insulate axons, protect neurons, and guide axon growth.

Explore the synapse, the gap between neurons, and how chemical and electrical signals pass messages via neurotransmitters, the synaptic cleft, and receptors.

Explore reflex action and the reflex arc, including involuntary responses to stimuli, knee-jerk examples, and the difference between mono synaptic and poly synaptic reflexes.

Explore the knee jerk reflex, a mono synaptic reflex with a four-stage arc—sensor to spinal cord, interneuron, motor neuron, and muscle, triggering a leg kick.

Explore the human brain as the central computer of the body, detailing its structure, protection by cranium and meninges, cerebrospinal fluid, gray and white matter, and brain divisions.

Explore the forebrain's structure and function, including cerebrum and cortex, the four lobes (frontal, parietal, temporal, occipital), hemispheres, corpus callosum, and inner parts like thalamus, hypothalamus, amygdala, and hippocampus.

Map the midbrain's role in visual and auditory processing and eye movement, through its three parts: the colloquially part, segment, and cerebral periwinkles, and their coordination and motor skill functions.

Explore the hindbrain’s major parts—medulla oblongata, pons, and cerebellum—and how they form the brainstem and coordinate autonomic functions, motor control, arousal, motor learning, and long-term memory.

Explore how the spinal cord connects brain to the body and coordinates movement through spinal nerves, enabling reflexes within the central nervous system.

Explore spinal cord anatomy, from vertebral protection and cervical to coccyx sections, to gray and white matter with dorsal, ventral, and lateral horns, and ascending/descending tracts.