5.4.1 Control and coordination Where is the plant hormone made? In the root tip Which hormone and how does it control the responses of plants to light and gravity? Auxin Unequal distributions of auxin cause unequal growth rates in plant roots & shoots Higher con...
5.3.1 Human endocrine system Endocrine system Composed of gland which secrete chemicals called hormones into bloodstream Hormone transported in bloodstream to target organ where it produces an effect Effect slower but longer compare to nervous system What is a...
5.2.1 Structure and function Central nervous system (CNS) Brain & spinal cord Coordinates response of effectors eg muscles contracting / glands secreting hormones Stimulus → receptor → coordinator (CNS) → effector → response Describe the function of receptors. (2)...
What is homeostasis? Regulation of internal conditions of a cell or organism to maintain optimal conditions Why is homeostasis important in body? (1) Maintain optimal conditions for enzymes action & all cell functions In human body, these include control of: Blood...