Biology-Objective Related Question Answers
576. Which gland produces the hormone thyroxine?
Thyroid gland
577. What is the long tube like extension of neuron body?
Axon
578. Which structure is called pace maker of the heart?
S.A. node
579. The only vein which carry pure blood to the heart?
Pulmonary vein
580. The only artery that carry impure blood from the heart?
Pulmonary artery
581. Which blood vessels have valves in them?
Veins
582. The nerve that carries the impulses from the sense organs to the central nervous system?
Sensory nerve
583. Write an example of mixed nerve:?
Vagus nerve
584. Give the term for contraction and relaxation of heart:?
Systole; diastole
585. Which membrane connects the brain and spinal cord?
Meninges
586. Which part of the brain initiates all voluntary activities?
Cerebrum
587. What co-ordinates the muscle function?
Cerebellum
588. Write an example for sensory nerve:?
Auditory nerve
589. What is caused due to the permanent damage caused to any part of brain tissues due to inadequate supply of blood?
Stroke
590. Which infectious disease affects the brain and the nerves?
Poliomyelitis
591. What are the fatty covering of some axons called?
Myelin sheath
592. Which nerves convey impulses from the brain and spinal cord to the other parts of the body?
Motor nerves
593. The narrow space which separates the axonites of a neuron and the dendrites of another neuron is called?
Synapse
594. Which chemical substance is secreted into the synaptic cleft?
Acetyl choline
595. What is called the protective covering of the brain?
Cranium
596. Name the transverse band of nervous tissues which joins the cerebral hemispheres which is separated by a median cleft:?
Corpus collosum
597. Which part acts as a relay station for the incoming and outgoing impulses to and from the cerebrum?
Thalamus
598. The part of brain where pain killers works?
Thalamus
599. Where is the two hormones secreted by the hypothalamus stored?
Pituitary
600. Which part of our body filter urea from blood?
Kidneys
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