Biology questions
20584 published questions with worked solutions.
- Serotonin and melatonin is concerned with
- In case, the Islets of Langerhans stop functioning, which hormone will be in short supply and what will be its effect?
- When the hand is pricked with a needle, the events that occur are
- Which of the following hormone is not secreted in the posterior lobe of pituitary?
- Select the correct matching hormone, its source and function (Hormone – Source – Function)
- During a chemical synapse
- Which of the following statements about hormones are true? (i) Hormones are produced in response to specific stimulus (ii)...
- During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q)....
- When a neuron is in resting state, i.e. not conducting any impulse, the axonal membrane is
- Which statements are incorrect? I. Synaptic cleft of neurons secrete adrenaline. II. Myelinated nerve fibres are enveloped with...
- Nerve impulse travels faster in
- In a myelinated neuron, two adjacent myelin sheaths are separated by gaps called
- The nerve fibre in its resting stage is
- Which of the following are the properties of neural system?
- The electrical potential difference across the plasma membrane, when concentration of K^+ is high inside axon and low outside...
- Maintenance of the ionic gradients across the resting membrane is done by the
- The electrical potential difference across the plasma membrane at the site of stimulus is called
- A synapse is formed by the membrane of
- On post-synaptic membrane, the new potential developed is
- Pre-synaptic neuron and a post-synaptic neuron may or may not be separated by a gap called