Free online life science study material.
Some important facts
1. Schwann cell are responsible for myelin synthesis.
2. Perineurium surrounds fascicles of axons in PNS.
3. Autonomic nervous system controls smooth muscle, cardiac muscle and gland activity.
4. The action potential of neuron is terminated by efflux of K+ ions.
5. The parasympathetic nervous stimulation of heart is increased activity of AV node.
6. Taste receptor of fishes are most sensitive chemoreceptor of of vertebrates.
7. The fovea of the eye is the region of highest visual activity.
8. Aqueous humor fills the anterior of eye and vitrous humor fills the posterior chamber.
9. CO2 is transported mostly as dissolved bicarbonate in blood.
10. Vasopressin and oxytocin are produced by posterior lobe of pituitary gland.
11. Testosterone does not act by secondry messanger system.
12. All hormones of adrenal cortex are synthesised from cholesterol.
13. Ecdysone is moulting hormone of insects.
14. Epinephrine and norepinephrine are hormones as well as neurotransmitters.
15. Epinephrine is modified amino acid.
16. Thyroxine is important for normal metabolic rate.
17. Hemoglobin is most abundant protein in human body.
18. Cholecystokinin and secretin are produced in small intestine.
19. A graffian follicle is a mature follicle ready to ovulate.
20. Absence of parietal cell could lead to pernicious anemia.
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