Page 2: The Brain and Eye Structure

This section details the anatomy and function of the brain and eye, crucial components in the body's sensory and control systems.

Definition: The cerebral cortex controls consciousness, intelligence, memory, and language.

Highlight: The eye's ability to focus on objects at different distances involves changes in lens shape through ciliary muscle action.

Example: Long-sightedness (hyperopia) occurs when the eye cannot focus on near objects and requires convex lenses for correction.

Vocabulary: Accommodation refers to the eye's ability to adjust its focus for objects at different distances.

Page 1: Introduction to Homeostasis and the Nervous System

This page introduces fundamental concepts of homeostasis and the nervous system's role in maintaining internal balance. The content explains how organisms respond to environmental changes through coordinated systems.

Definition: Homeostasis is the maintenance of optimal conditions for cellular processes through regulation of internal conditions.

Highlight: Negative feedback systems are crucial for maintaining homeostasis, involving receptors, coordination centers, and effectors.

Example: The regulation of temperature, CO2 levels, and blood sugar demonstrates homeostatic control.

Vocabulary: Synapses are gaps between neurons where neurotransmitters facilitate signal transmission.