CONTROL AND COORDINATION
Very Short Question And Answers
Q1: Which chemical induces artificial ripening of fruits?
Answer: Ethylene
Q2: What is stimulus?
Answer: The changes in the environment to which an organism responds and reacts is called stimulus.
Q3: Name the longest cell present in the human body.
Answer: Neuron is the longest cell in the human body.
Q4: Give examples of glands which act as both endocrine and exocrine.
Answer: Pancreas, Testes, Ovaries
Q5: What are nastic movements?
Answer: Movements of plants which are independent of stimuli are called nastic movements. e.g. movement by Touch-Me-Not (Mimosa) plant i.e. leaves close or droop when touched.
Q6: Where do you find gustatory receptors?
Answer: On the tongue.
Q7: What do olfactory receptors detect?
Answer: They detect smell.
Q8: Name the hormone released by thyroid gland.
Answer: Thyroxin.
Q9: Where is Hypothalmus is located?
Answer: In the brain.
Q10: Where are adrenal glands located?
Answer: Above each kidney
Q11: Which part of the brain controls riding of bicycle?
Answer: Hind brain
Q12: Which type of nervous system (central, peripheral or autonomous) control the movement of eye when a a light is flashed suddenly?
Answer: Autonomous nervous system.
Q13: What would happen if plants lack Abscissic acid?
Answer: Leaves would not wilt.
Q14: Which plant hormone promotes cell division?
Answer: Cytokinins
Q15: What do we call the inter neuron junction where neurotransmitters are released?
Answer: Synapse
Q16: What is cranium?
Answer: The bony box or skull in which the brain is located is called cranium.
Q17: We suddenly withdraw our hand when a pin pricks. Name the type of response involved in this action.
Answer: Reflex action
Q18: Which gland releases growth hormone?
Answer: Pituitary gland.
Q19: What is called the longest fibre on cell body of a neuron?
Answer: Axon
Q20: Which hormone regulates carbohydrate, protein and fat metabolism in the body?
Answer: Thyroxin
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