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Science
Quiz
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Chapter check
Which of the following statements is correct about receptors?
Electrical impulse travels in a neuron from
In a synapse, chemical signal is transmitted from
In a neuron, conversion of electrical signal to a chemical signal occurs at/in
Which is the correct sequence of the components of a reflex arc?
Which of the following statements are true? (i) Sudden action in response to something in the environment is called reflex action (ii) Sensory neurons carry signals from spinal cord to muscles (iii) Motor neurons carry signals from receptors to spinal cord (iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
Which of the following statements are true about the brain? (i) The main thinking part of brain is hind brain (ii) Centres of hearing, smell, memory, sight etc are located in fore brain. (iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain (iv) Cerebellum does not control posture and balance of the body
Posture and balance of the body is controlled by
Spinal cord originates from
The movement of shoot towards light is
The main function of abscisic acid in plants is to
The movement of sunflower in accordance with the path of sun is due to
The substance that triggers the fall of mature leaves and fruits from plants is due to
Which of the following statements about transmission of nerve impulse is incorrect?
Involuntary actions in the body are controlled by
Which of the following is not an involuntary action?
When a person is suffering from severe cold, he or she cannot
The hormone which increases the fertility in males is called
Which of the following endocrine glands is unpaired?
Junction between two neurons is called
In humans, the life processes are controlled and regulated by
