Punjab 12th Class Biology Chapter 17 Coordination and Control Mcqs Test Online Punjab 12th Class Biology Chapter 17 Coordination and Control Mcqs Test Online 1234567 Question 1 of 7Biology 1. Depolarization of an axon is produced by the movement of: 1.Na⁺ into the axon to bond with K⁺ 2.Na⁺ into the axon and K⁺ out of the axon 3.K⁺ into the axon and Na⁺ out of the axon 4.Na⁺ and K⁺ within the axon toward the axon terminalQuestion 1 of 7Question 2 of 7 2. Where are neurotransmitter receptors located? 1.On the postsynaptic membrane 2.At nodes of Ranvier 3.On the nuclear membrane 4.In the myelin sheath Question 2 of 7Question 3 of 7 3. The function of the nerve gas is to inhibit the function of: 1.Acetylcholine 2.Cholinesterase 3.Noadrenaline 4.Atropine Question 3 of 7Question 4 of 7 4. The cell transmits impulses from the: 1.Effector organ to the spinal cord 2.Spinal cord to the effector organ 3.Receptor cells to the spinal cord 4.Receptor cells to the effector organ Question 4 of 7Question 5 of 7 5. Impulses travel very rapidly along nerves to the leg of a man. Which fact accounts for the speed at which they travel? 1.A nerve impulse is an all or none phenomenon 2.The nerves contain myelinated fibres 3.There is a high concentration of Na⁺ ions inside the axons 4.There is a potential difference across the axon membranes Question 5 of 7Question 6 of 7 6. Which of these are the first and last elements in a spinal reflex? 1.Sense organ and muscle effector 2.Motor neuron and sensory neuron 3.Ventral horn and dorsal horn 4.Axon and dendrite Question 6 of 7Question 7 of 7 7. What will happen it the receptor sites on the post-synaptic membrane are blocked by a drug at the neuromuscular junction? 1.Muscle paralysis 2.Inhibition of acetylcholine 3.Muscle contraction 4.Inhibition of cholinesterase Question 7 of 7 Loading... Test By Subject Punjab Test By Topics 12th Class Biology You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.