Vineet’s day begins with a cup of piping hot coffee. Caffeine is a stimulant present in coffee which increases the circulation of Adrenaline in the body. Vineet feels refreshed, alert and focussed.
(a) Name the organ that is stimulated by caffeine which makes Vineet alert and focussed.
(b) Give the collective term for the protective membranes of the organ mentioned in (a).
(c) Which part of the autonomic nervous system increases the secretion of Adrenaline?
(a) Brain
(b) Meninges
(c) Sympathetic nervous system
More ICSE Easy level questions
State the difference between Nephron and Neuron.
What is a Reflex action?
State the exact location of the following structures: (a) Thyroid gland (b) Dura mater (c) Amniotic fluid (d) Papillary muscles (e) Islets of Langerhans
Arrange and rewrite the terms in each group in correct order to be in a logical sequence beginning with the term that is underlined: (a) Snake, Rabbit, Cabbage, Hawk. (b) Xylem, Soil water, Cortical cells, Root hair. (c) Receptor, Response, Effector, Spinal Cord. (d) Fovea, Lens, Cornea, Conjunctiva. (e) Testis, Urethra, Sperm duct, Epididymis.
What are the two functions of cerebellum.
Name the type of nerve which has the fibres of both sensory and motor neurons.
Read the explanations given below and name the structures: (a) The canal through which the testes descend down into the scrotum just before the birth of a male baby. (b) The part of the brain that regulates the peristaltic movement of the alimentary canal. (c) A structure that collects the soundwaves and conducts them through the external auditory canal. (d) The point of attachment of two chromatids of a chromosome. (e) Regulation of the opening and closing of stomata.
Assertion (A): Arachnoid layer helps in speeding up the transmission of nerve impulses along the axons. Reason (R): Axon endings at the synapse secrete acetylene. (a) A is True and R is False (b) A is False and R is True (c) Both A and R are True (d) Both A and R are False
Arrange the terms in each group in the correct order. Write them in a logical sequence beginning with the term that is underlined. (a) Palisade cells, Cuticle, Upper epidermis, Spongy cells. (b) Hepatic portal vein, Stomach, Hepatic vein, Liver. (c) Cyton, Dendrites, Synaptic cleft, Axon endings. (d) Insulin release, High blood sugar, Lowers blood sugar, Stimulates glucose uptake from blood. (e) Sperm duct, Seminiferous tubule, Epididymis, Efferent ducts.
Copy the diagram given below. (a) Name the structure. (b) Label Gray matter and White matter.
Mohan is fond of playing basketball. His concentration is on shooting the ball into the opponent’s basket as given in the picture. (a) Which part of the brain helps Mohan to concentrate in putting the ball into the basket? (b) Name the sense organ that helps to gauge the distance between the ball and the basket. (c) Name the part of the brain that co-ordinates all the voluntary muscles of his body.
Bharat woke up late in the morning and missed the school bus. This situation stimulated the nerves of the sympathetic system which resulted in (a) Constriction of Coronary arteries (b) Muscle relaxation (c) Decrease in Respiration rate (d) Bronchodilation
