Multiple Choice QuestionsIn human eyes, colour perception is done by
rod cells only
cone cells only
Both (a) and (b)
choroid laver cells
During the conduction of nerve impulse, the action potential is the result of movement of
Na+ from intracellular fluid to extracellular fluid
Na+ from extracellular fluid to intracellular fluid
Na+ towards both directions
None of the above
Which are the longest cells in the body of man ?
Muscle cells of legs
Bone cells
Nerve cells
None of the above
Which of the following part of a neuron is covered by fatty sheath ?
axon
cyton
dendrite
node of Ranvier
If drosal nerve of spinal cord is broken down then its effect is :
no impulse is transmitted
impulse is transmitted but slowly
impulse is trasmitted fast
no effect on impulse
A condition in which body's internal environment remains relatively constant within limits is called :
homeostasis
hemostasis
hematoma
haemopoiesis
Intercellular communication in multicellular organism occurs through :
digestive system only
respiratory system only
nervous system only
both nervous and endocrine system
Tongue is under control of :
trigeminal nerve
facial nerve
automatic nervous system
glossopharyngeal nerve
Assertion : The imbalance in the concentration of Na+, K+ and proteins generates the resting potential.
Reason : To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
