3.7.1 The Role of Human Nervous System (Structured Question 1 & 2)

Question 1:Diagram below shows a cross-section of part of the nervous system.(a)(i) Name structure P.(a)(ii) State the function of P.(b)(i) Why is Q swollen at the dorsal root?(b)(ii) Complete the Diagram with the neurones involved in a reflex action. Mark the direction of the impulse movement on the neurones.(c) Compare two structures of a sensory … Read more3.7.1 The Role of Human Nervous System (Structured Question 1 & 2)

3.6 Plant Hormones

3.6 Plant Hormones1.      Growth of shoots towards sunlight is called positive phototropism.2.      Growth of shoots away from sunlight is called negative phototropism.3.      In plants, hormones play an important role in growth processes such as seed germination, growth of roots and development of fruits.4.      There are many types of plant hormones, such as auxins and ethylene.  … Read more3.6 Plant Hormones

3.4.1 The human kidney

The Excretory System1.   The excretory system plays an important role in homeostasis.2.   The primary organs of the excretory system are kidneys. The human kidney1.   The kidneys filter blood and form urinewhich exits the body through the ureters, urinary bladder and urethra.2.Urine is fluid which consists of water, urea and other dissolved wastes.3.The human kidney shows three … Read more3.4.1 The human kidney

3.4 Homeostasis in Humans

3.4 Homeostasis in Humans 1.      The internal environment consists of interstitial fluid and blood plasma that constantly bathe the cells.2.      Homeostasis is the process of regulating the physical and chemical factors in the internal environment, so that these factors can be maintained in a dynamic equilibrium and optimum condition.     (a) The physical factors include body … Read more3.4 Homeostasis in Humans