Neurons (nerve cells ) are functional units of the nervous system. The three main parts of neurons are Dendrites, Axons and cell body. Dendrite: Detects information and sends it to the cell body Cell Body: Maintains growth of the cell Axon: Conducts messages away from the cell body and signals to the next neuron.
Our body contains receptors, which are mostly found in the sensory organs. Receptors collect information about changes in our environment and transmit it to the brain, which then reacts to the change. Receptor failure prevents external inputs from generating nerve impulses, which prevents the body from responding.
(d) all the above The brain is responsible for thinking, the brain regulates the heartbeat, and balances the body.
Answer – (b) Synapse A dendrite is a short, branched extension of a nerve cell that serves as a pathway for the transfer of synaptic impulses from other cells to the cell body. In vertebrates, a nerve cell or neuron’s long, slender projection known as an axon or nerve fibre normally carries electrical impulses known …
The gap between two neurons is called a
(a) Dendrite.
b) Synapse.
(c) Axon. (d) Impulse. Read More »
Answer – d) cytokinin. Insulin, thyroxin, and oestrogen are hormones made by animals, but cytokinin is a hormone produced by plants.
The pancreatic cells of a person with diabetes stop or limit the production of the hormone insulin. By converting excess glucose to glycogen, insulin controls blood sugar levels. A person’s blood glucose level is affected when insulin is not created adequately, which has negative effects. Diabetes patients receive insulin injections as part of their treatment …
Why are some patients with diabetes treated by giving injections of insulin? Read More »
A person’s body releases the hormone adrenaline when they are frightened or emotionally unbalanced. The heartbeat accelerates as soon as adrenaline reaches the heart, increasing the blood flow to the muscles. As a result of the diaphragm and rib muscles contracting, adrenaline also quickens breathing. Additionally, the adrenaline rush raises blood pressure and facilitates the blood’s …
How does our body respond when adrenaline is secreted into the blood? Read More »
To prevent an iodine shortage, it is advised to use iodized salt. Low iodine consumption will result in less thyroxine being released from the thyroid gland. This has an impact on protein, carbohydrate, and fat metabolism. As a result, if iodine consumption is reduced, a person may get goitre.
Chemical coordination takes place in animals with the help of chemical messengers called hormones.Chemicals called hormones are released by particular endocrine glands. Animal homeostasis, growth, and development are all governed by hormones.
To demonstrate hydrotropism in plants. Procedure : i. Plant a seedling in a soil-filled vessel. ii. Place a porous pot filled with water near the seedling. iii. Leave the set up for a few days. Observation : iv. On examining the roots, it is observed that the roots bend towards the source of water and …
Design an experiment to demonstrate hydrotropism. Read More »
