All of the growth and development activities, including cell division, enlargement, flowering, seed formation, dormancy, and abscission, are regulated by plant hormones. Plant hormones are divided into two categories based on how they act:Plant Growth PromotersPlant Growth Inhibitors.
Plant hormone (phytohormone) “Organic compounds called as phytohormones are found in extremely small amounts in plants. They control the growth, reproduction, survival, and development of plants.” Let’s now examine the composition and uses of various phytohormones, like (i) Auxins, (ii) Gibberellins, (iii) Cytokinins, (iv) Ethylene, and (v) Abscisic acid.
Plant hormone (phytohormone) Organic compounds called as phytohormones are found in extremely small amounts in plants. They control the growth, reproduction, survival, and development of plants. Let’s now examine the composition and uses of various phytohormones, like (i) Auxins, (ii) Gibberellins, (iii) Cytokinins, (iv) Ethylene, and (v) Abscisic acid. What are the main functions of …
What is plant hormone (phytohormone) ? write functions of phytohormones. Read More »
Q1 ASSERTION (A): a nerve impulse is an electrochemical event. REASON(R): In a nerve impulse there are changes in the resting potential which spread down the nerve fibre. Ans :- (a) R is the correct explanation for A, and both A and R are true. Q2 ASSERTION (A): Insulin regulates blood sugar level. REASON(R): insufficient …
Functions of brain Parts The fore brain The fore brain is the main part of the brain responsible for thinking. It has areas where different receptors send sensory impulses. The forebrain has several regions that are specialised for hearing, smell, sight, and other senses The cerebrum is responsible for sensory processing. Which coordinates all voluntary …
What are the major parts of the brain? Mention the functions of different parts. Read More »
Structure of a neuron The neuron is a highly specialized cell responsible for the transmission of nerve impulses. The soma or cell body is a structure like a star with hairs. Dendrites are formations that resemble hair. Nerve impulses are received by dendrites. The axon, which is the nucleus’ tail, terminates in hair-like structures that …
Draw the structure of a neuron and explain its function. Read More »
a) Pituitary gland is present in the brain, so it is associated with the brain. b) The pancreas secretes digestive enzymes as well as hormones. That’s why it is called the endocrine as well as the endocrine gland. c) Adrenal gland is present top of the kidneys. It is associated with kidneys. d) The testis …
a) The changes that are seen in females during puberty are caused by the oestrogen hormone.b) Growth hormone deficiencies lead to dwarfism.c) When the hormone insulin is sufficient, blood sugar levels increase.d) Iodine is required for the production of the hormone thyroxine.
A nerve cell’s nerve impulse is converted at the synapse to neurotransmitters, which travel in the direction of the dendrites of the next neuron to generate an electric impulse.
Iodine is essential for the synthesis of the hormone thyroxin. If we take a low iodine diet it cause to hypothyroidism which results in a disease called goitre.
