Science
Control and Coordination
Practice questions
Hormones circulate through the whole body in blood yet why do they affect only specific organs?If auxin distribution remains equal on both sides, why can bending of the stem in one direction decrease?How is coiling of a tendril around a support evidence of unequal growth after touch?Calling receptors of the nose and tongue chemical receptors is based on which logic?If there is a problem in the inner ear, why can a person have difficulty maintaining balance even when the eyes are normal?Salivation on seeing tasty food shows which complex coordination?If an effector muscle cannot contract even after receiving a signal, which link of coordination will be considered failed?In the same plant, the root grows towards water and the stem grows towards light. What is this the best evidence of?Heartbeat becoming faster before a race is an example of which coordination?Why can deficiency of thyroxine affect the normal working rate of the body?If the receptor, control centre, or effector has a fault, which part can affect the correct response?How is chemical coordination in plants basically different from nervous coordination in animals?During running, more blood going to muscles than to the digestive system shows which biological priority?Why can hormonal control be more suitable than nervous control for long-term growth and metabolism?If the control centre interprets the message incorrectly, why can the response be wrong even when the receptor is correct?Why are phototropism, hydrotropism, and geotropism placed in the same category?If a substance blocks chemical transmission at a synapse, why will a signal not form in the next neuron?Why is it scientifically wrong to call plants insensitive even though they have no brain?Why can both excess and deficiency of growth hormone cause problems?If the retina makes correct signals but the visual area of the brain is affected, why will vision be difficult?