Biology

• HCl is needed in stomach to make the medium Acidic
• Pepsin requires acidic medium in order to function properly.
• Gustatory receptors detect taste
• Olfactory receptors detect smell
• Photoreceptor detect light
• Spinal cord plays vital role in reflex actions
• Brain plays no role in reflex action
• Formula of Glucose is C6H12O6
• Full form of ATP is adenosine triphosphate.
• Photoreceptors are found in eyes to detect light
• Synapse is a junction between two neurons that allows for transfer of chemical signals.
• Electricals impulses in a neuron take following route - Dendrite > Cell body > Axon > Axonal end
• In a neuron the conversion of electrical signal to a chemical signal takes place at the Axonal end
• Reflex Arc - Receptor -> Sensory neuron -> Spinal cord -> Motor neuron -> Muscle
• Cerebellum controls the posture and balance of the body
• Medulla controls involuntary functions
• Pons regulates respiration
• Cerebrum is responsible for sensory processing and muscle movement.
• Reflex action is the sudden action in response to dangerous stimuli by the Spinal cord
• The Spinal cord originates from the Medulla
• Movement of plant due to gravity is called Geotropism
• Movement of plant due to light is called Phototropism
• Movement of substance due to Chemicals is called Chemotropism
• In plants, Abscisic acid inhibits growth by wilting of leaves
• In plants, Auxin promotes cell growth
• In plants, Cytokinin promotes cell division
• In plants, Gibberellin facilitates cell elongation
• In fruits, Ethylene promotes rapid ripening
• Iodine is necessary for synthesis of Thyroxine
• Thyroxine is secreted by the thyroid gland and it regulates metabolism
• Deficiency of Iodine leads to Goiter (Inflammation of Neck)
• Pituitary gland secretes Growth Hormone
• Stomach secretes pepsin which acts on Protein
• Pancreas is also called Dual - Gland as it is both exocrine and endocrine gland.
• Pancreas secretes both Insulin and Trypsin.
• Major water absorption occurs in the Large Intestine
• Salivary Amylase is secreted by Salivary Glands to break down starch into simple sugars.
• Insulin regulates the blood sugar levels
• The growth of tendril in pea plants is due to rapid cell division in cells that are away from the support
• The change in shape of guard cells in leaf is due to change in the amount of water