S) Which of the following causes the DEPOLARIZATION phase of an action potential
ID: 3477640 • Letter: S
Question
S) Which of the following causes the DEPOLARIZATION phase of an action potential NMDA receptors Voltage-sensitive potassium eh Nicotinic acetylcholine receptors Voltage-sensitive sodium channels AMPA receptors A. B. C. D. E. 9 Which of the following senses detects CHEMICALS? A. Senses of taste& smel1 B. Sense of equilibrium C. Sense of hearing D. A&B; E. A, B& C 10) Which of the following performs INTEGRATION in monosynaptic reflex ares? A. Sensory neuron B. Synapse C Interneuron D. Axon hillock E. Motor neuron 11) What would happen if body cells EALL to take up glucose from blood plasma? A. B. C. D. E. Protein depletion Glucose accumulation in blood plasma Neurons metabolize fatty acids to obtain ATP A& B A, B&C; 12) Which of the following ENZYMES is involved during transeription? A. DNA polymerase B. Primers C. Ribosome D. Okazaki fragments E. RNA polymerase ich of be folT ection potetiasi A. Axons B. Axon hillocks C. Cell bodies & dendrites D. A& B E. A, B&C; 4) Which of the following types of macromolecules of life STORES genetic information? A. Proteins B. Fatty acids D. Nucleic acids E. Lipids 15) Which of the following GASES was generated by yeasts during aerobic cellular respiration? A. Hydrogen gas B. Carbon dioxide C. Molecular oxygen D. A &B; E A, B&C;Explanation / Answer
8. The voltage sensitive sodium channels genearte depolarization of action potential. The opeening of the channels causes an influx of sodium ions within the cell. This results in depolarization of the membrane potential i.e. the membrane potential become more positive.
Option D.
9. Chemicals in food are detected by the taste buds of the tongue. Taste buds are special structures embedded within small protuberances on the tongue called papillae. There are around 5000-1000 taste buds that can detect sugars, acids and salts. Tatse buds send signsal to the nerve fibers,. The nerve fibers transmit impulses along cranial nerves to taste regions in the brainstem. Brainstem relays messages to the hypothalamus and cerebral cortex for aperception of taste. The nose also smells chemicals by aprocess called olfaction. The chemoreceptors in th nose sense these chemicals and transmit it to olfactory neurons. These neurons sens signals to the brain for perception os smell.
Option A.
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