Unit 6

Contents

1. Survival and response  

1.1 Taxes and Kinesis 

1.2 Plant response to stimuli 

1.2.1 Gravitotropism

1.3 Reflexes

1.3.1 Reflexes

1.3.2 Receptors

1.3.3 Pacinian Corpuscules

1.3.4 Photoreceptors

2. Autonomic Nervous System

2.1 The Heart

2.1.1 Contraction of the Heart

2.1.2 Control of Heart Rate

3. Nervous System

3.1 Nerve Impulses

3.1.1 Resting Potential

3.1.2 Action Potential

3.1.3 Conduction of Action Potential

3.1.4 Myelin Sheath

3.1.5 Factors affecting speed of conduction

3.2 Synaptic Transmission

3.2.1 Synaptic Transmission

3.2.2 Summation

4. Muscle Contraction

4.1 Skeletal Muscle

4.1.1 Steps of Muscle Contraction

4.1.2 Fast Twitch and Slow Twitch Muscles

5. Homeostasis

5.1 Baics of Homeostasis

5.2 Control of Blood Glucose 

5.2.1 Hyperglycaemia

5.2.2 Hypoglycaemia

5.2.3 Adrenaline

5.2.4 Diabetes

5.3 Control of Blood Water Potential

5.3.1 The Anatomy of the Kidneys

5.3.2 Water Reabsorption in the Kidneys

5.3.4 Ultrafiltration

5.3.5 Selective Reabsorption

5.3.6 Loop of Henle

5.3.7 Distal Convoluted Tubule and the Collecting Duct

5.3.8 Concentration of Urine