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 Cell Shape and Size Explained | Prokaryotic Cells NEET Biology Different cell shapes, cell sizes and prokaryotic cell types explained for NEET Biology preparation. - Dr.Sanjaykumar Pawar  UNIT OF LIFE – Cell Size, Shape and Prokaryotic Cells (Easy NEET Notes) 1. Different Shapes of Cells Red Blood Cells (RBCs) Shape: Round and biconcave disc. Biconcave means depressed in the center on both sides. This shape increases surface area for oxygen transport. RBCs carry oxygen to all parts of the body. Average diameter = about 7 µm. White Blood Cells (WBCs) Shape: Irregular and amoeboid. Amoeboid means they can change their shape. They move from blood vessels into tissues. WBCs help in body defense and immunity. Columnar Epithelial Cells Shape: Long, narrow and column-like. Found in the lining of stomach and intestine. Help in absorption and secretion of substances. Nerve Cell (Neuron) Shape: Branched and long. Consists of cell body, dendrites and axon. Ner...

  Forebrain, Midbrain and Hindbrain – Easy NEET Notes 18.4.1 Forebrain Forebrain consists of: Cerebrum Thalamus Hypothalamus These are the major parts of the forebrain. Cerebrum Cerebrum is the largest part of the human brain . It controls: Thinking Intelligence Memory Learning Speech Voluntary actions Cerebral Hemispheres A deep groove divides the cerebrum into: Left cerebral hemisphere Right cerebral hemisphere Corpus Callosum Both hemispheres are connected by nerve fibres called: Corpus callosum It allows communication between the two hemispheres. Cerebral Cortex Outer layer of cerebrum is called the cerebral cortex . It is highly folded to increase surface area. It appears grey due to presence of neuron cell bodies. Therefore, it is called Grey Matter . Functions of Cerebral Cortex It contains: Motor areas → control voluntary movements. Sensory areas → receive sensory impulses. Association areas → involved in: Memory Inte...

  NEET-Level MCQs (Hard) Chapter: Neural Control and Coordination  By- Dr.Sanjaykumar pawar 1. Homeostasis is best defined as: A. Coordination between muscles and bones B. Maintenance of constant internal environment C. Production of hormones by glands D. Transmission of impulses through neurons ✅ Answer: B Explanation: Homeostasis means maintaining stable internal body conditions like temperature, pH, oxygen level, etc. 2. Which of the following systems provides point-to-point rapid coordination? A. Endocrine system B. Circulatory system C. Neural system D. Excretory system ✅ Answer: C Explanation: Neural system uses electrical impulses for fast and precise communication. 3. During physical exercise, increased oxygen demand directly causes: A. Decrease in heartbeat B. Reduced respiration rate C. Increase in respiration rate D. Kidney failure ✅ Answer: C Explanation: More oxygen is needed during exercise, so breathing rate increases. 4. Which s...

  https://bioteacher-iq.blogspot.com/ Chapter 18: Neural Control and Coordination Easy NEET Notes (Line by Line Explanation) Introduction Our body has many organs like heart, lungs, kidneys, muscles etc. All these organs must work together properly. This is called coordination . What is Coordination? Definition Coordination means: Two or more organs work together They help each other perform functions properly It maintains balance inside body ( homeostasis ) Homeostasis Maintenance of constant internal environment Example: Normal body temperature Normal blood pressure Proper oxygen level Example of Coordination During Exercise When we do physical exercise: Step 1: Muscle activity increases Muscles need more energy Step 2: Oxygen demand increases More oxygen is required to produce energy Step 3: Respiration rate increases Lungs work faster Breathing rate increases Step 4: Heartbeat increases Heart pumps blood faster Step 5: Blood flow incr...