Please choose the correct answer of the following: 21) Acetylcholinesterase: a)
ID: 3518396 • Letter: P
Question
Please choose the correct answer of the following:21) Acetylcholinesterase: a) is the neurotransmitter in the sympathetic nervous system. b) is the neurotransmitter in the parasympathetic nervous system. c) is inactivated by organo-phosphate insecticides. d) all of the above. e) none of the above. 22) Receptor-mediated endocytosis: a) is how cells secrete proteins. b) is how the golgi apparatus receives specific proteins from the ER. c) is how cells absorb specific molecules. d) is how cells release CO2. e) is how cells absorb water. 23) Cotransport: a) is a way of moving large molecules across membranes. b) is how glucose enters cells. c) harnesses energy released by diffusion of smaller particles. d) requires energy. e) all of the above 24) Cell membranes: a) contain proteins. b) contain cholesterol. c) contain phospholipids. d) are selectively permeable e) all of the above. 25) Phospholipids: a) are hydrocarbons with phosphate heads. b) form selectively permeable membranes. c) are amphipathic. d) all of the above. e) none of the above. 26) Transmembrane proteins: a) attach to one side of a cell membrane. b) typically function as ion channels. c) are made of phospholipids. d) are made of cholesterol. e) all of the above. 27) The sodium-potassium pump: a) generates resting potential. b) pumps three sodium ions out of a cell for every two potassium ions it pumps into a cell. c) consumes energy. d) is used in active transport. e) all of the above. 28) Peripheral bound proteins: a) are typically ion channels. b) open up to allow large molecules to cross cell membranes. c) include the Na/K pump. d) may serve a structural function. e) all of the above. 29) The cis-face of a plasma membrane: a) faces the extracellular fluid. b) faces the intracellular fluid. c) is virtually identical to the trans-face of a plasma membrane. d) contains lots of hormone receptors. e) none of the above. 30) Cyclic AMP: a) easily crosses cell membranes. b) is a “second messenger”. c) occurs on the trans-face of a cell membrane. d) all of the above. e) none of the above. 31) Steroid hormones: a) easily cross cell membranes. b) require a second messenger. c) dissolve readily in the bloodstream. d) none of the above. e) all of the above. 32) Osmolarity: a) refers to the concentration of salt per liter of water. b) refers to the amount of dissolved particles per kilogram of water. c) refers to the total concentration of dissolved particles per liter of water. d) is higher with glucose than salt. e) none of the above. 33) Facilitated diffusion: a) requires transmembrane proteins. b) utilizes an existing concentration gradient. c) may require a little energy to open the protein channel. d) is otherwise a form of passive transport. e) all of the above. 34) Active transport: a) pumps materials against a concentration gradient. b) releases energy. c) utilizes an existing concentration gradient. d) all of the above. e) none of the above. 35) A post-synaptic bulb: a) contains synaptic vesicles. b) contains chemical gated ion channels. c) occurs at the end of an axon-terminal. d) occurs on a Schwann cell. e) none of the above. 36) A pre-synaptic bulb: a) contains neurotransmitter receptors. b) contains chemical-gated ion channels. c) occurs at the end of a dendrite. d) contains synaptic vesicles. e) none of the above. 37) A graded potential: a) occurs on an axon. b) maintains its full strength over the entire distance it travels. c) is generated in the trigger zone. d) all of the above. e) none of the above. 38) An action potential: a) occurs on an axon. b) maintains its full strength along the entire distance of travel. c) is generated in the trigger zone. d) all of the above. e) none of the above. 39) Threshold potential: a) is typically -45mV. b) is the maximum depolarization a neuron can stand before being permanently damaged. c) id typically -70mV. d) may reach -90mV. e) none of the above. 40) The presence of myelin: a) reduces threshold potential. b) eliminates the need for neurotransmitters. c) makes neurotransmitters diffuse much faster. d) speeds up the rate of osmosis. e) blocks the activity of acetylcholinesterase. 41) Ganglia: a) are clusters of myelinated cell bodies. b) transmit action potentials at speeds of up to 450 miles per hour. c) are found only in the CNS. d) consist of mainly white matter. e) none of the above. 42) Which of the following does not belong? a) myelin. b) acetylcholine. c) dopamine. d) epinephrine. e) adrenaline. 43) Which of the following does not belong? a) Na+ b) Cl- c) Glucose. d)K+ e) Ca2+ 44) Which of the following is not found in a monosynaptic reflex? a) receptor. b) sensory neuron. c) interneuron. d) motor neuron. e) effector. 45) If you stepped on a thumbtack while carrying a bag full of groceries, you would employ a: a) simple reflex. b) ipsilateral reflex. c) crossed extensor reflex. d) all of the above. e) none of the above, you’d just swear a lot. 46) An agonist: a) is a chemical that competes with a neurotransmitter for a receptor. b) is a chemical that increases the effect of a neurotransmitter. c) is a chemical that cancels out the effect of a neurotransmitter. d) all of the above. e) none of the above. 47) Voltage gated ion channels: a) are membrane bound proteins. b) typically allow Na+ ions to cross a cell membrane. c) are activated by a departure from resting potential. d) initiate an action potential. e) all of the above. 48) Signal transduction: a) is how peptide hormones get their message to the DNA. b) require a second messenger. c) require peripheral proteins. d) all of the above. e) none of the above. 49) An extremely strong stimulus such as a loud noise or heavy pressure on a fingertip: a) will generate a single very large action potential. b) will generate a very small graded potential. c) will generate a rapid series of action potentials. d) will not generate an action potential. e) none of the above. 50) The absolute refractory period: a) lasts about 200 mSec. b) is due to a lack of Na and K ions. c) is due to the K+ Channel gates resetting. d) all of the above. e) none of the above. Please choose the correct answer of the following:
21) Acetylcholinesterase: a) is the neurotransmitter in the sympathetic nervous system. b) is the neurotransmitter in the parasympathetic nervous system. c) is inactivated by organo-phosphate insecticides. d) all of the above. e) none of the above. 22) Receptor-mediated endocytosis: a) is how cells secrete proteins. b) is how the golgi apparatus receives specific proteins from the ER. c) is how cells absorb specific molecules. d) is how cells release CO2. e) is how cells absorb water. 23) Cotransport: a) is a way of moving large molecules across membranes. b) is how glucose enters cells. c) harnesses energy released by diffusion of smaller particles. d) requires energy. e) all of the above 24) Cell membranes: a) contain proteins. b) contain cholesterol. c) contain phospholipids. d) are selectively permeable e) all of the above. 25) Phospholipids: a) are hydrocarbons with phosphate heads. b) form selectively permeable membranes. c) are amphipathic. d) all of the above. e) none of the above. 26) Transmembrane proteins: a) attach to one side of a cell membrane. b) typically function as ion channels. c) are made of phospholipids. d) are made of cholesterol. e) all of the above. 27) The sodium-potassium pump: a) generates resting potential. b) pumps three sodium ions out of a cell for every two potassium ions it pumps into a cell. c) consumes energy. d) is used in active transport. e) all of the above. 28) Peripheral bound proteins: a) are typically ion channels. b) open up to allow large molecules to cross cell membranes. c) include the Na/K pump. d) may serve a structural function. e) all of the above. 29) The cis-face of a plasma membrane: a) faces the extracellular fluid. b) faces the intracellular fluid. c) is virtually identical to the trans-face of a plasma membrane. d) contains lots of hormone receptors. e) none of the above. 30) Cyclic AMP: a) easily crosses cell membranes. b) is a “second messenger”. c) occurs on the trans-face of a cell membrane. d) all of the above. e) none of the above. 31) Steroid hormones: a) easily cross cell membranes. b) require a second messenger. c) dissolve readily in the bloodstream. d) none of the above. e) all of the above. 32) Osmolarity: a) refers to the concentration of salt per liter of water. b) refers to the amount of dissolved particles per kilogram of water. c) refers to the total concentration of dissolved particles per liter of water. d) is higher with glucose than salt. e) none of the above. 33) Facilitated diffusion: a) requires transmembrane proteins. b) utilizes an existing concentration gradient. c) may require a little energy to open the protein channel. d) is otherwise a form of passive transport. e) all of the above. 34) Active transport: a) pumps materials against a concentration gradient. b) releases energy. c) utilizes an existing concentration gradient. d) all of the above. e) none of the above. 35) A post-synaptic bulb: a) contains synaptic vesicles. b) contains chemical gated ion channels. c) occurs at the end of an axon-terminal. d) occurs on a Schwann cell. e) none of the above. 36) A pre-synaptic bulb: a) contains neurotransmitter receptors. b) contains chemical-gated ion channels. c) occurs at the end of a dendrite. d) contains synaptic vesicles. e) none of the above. 37) A graded potential: a) occurs on an axon. b) maintains its full strength over the entire distance it travels. c) is generated in the trigger zone. d) all of the above. e) none of the above. 38) An action potential: a) occurs on an axon. b) maintains its full strength along the entire distance of travel. c) is generated in the trigger zone. d) all of the above. e) none of the above. 39) Threshold potential: a) is typically -45mV. b) is the maximum depolarization a neuron can stand before being permanently damaged. c) id typically -70mV. d) may reach -90mV. e) none of the above. 40) The presence of myelin: a) reduces threshold potential. b) eliminates the need for neurotransmitters. c) makes neurotransmitters diffuse much faster. d) speeds up the rate of osmosis. e) blocks the activity of acetylcholinesterase. 41) Ganglia: a) are clusters of myelinated cell bodies. b) transmit action potentials at speeds of up to 450 miles per hour. c) are found only in the CNS. d) consist of mainly white matter. e) none of the above. 42) Which of the following does not belong? a) myelin. b) acetylcholine. c) dopamine. d) epinephrine. e) adrenaline. 43) Which of the following does not belong? a) Na+ b) Cl- c) Glucose. d)K+ e) Ca2+ 44) Which of the following is not found in a monosynaptic reflex? a) receptor. b) sensory neuron. c) interneuron. d) motor neuron. e) effector. 45) If you stepped on a thumbtack while carrying a bag full of groceries, you would employ a: a) simple reflex. b) ipsilateral reflex. c) crossed extensor reflex. d) all of the above. e) none of the above, you’d just swear a lot. 46) An agonist: a) is a chemical that competes with a neurotransmitter for a receptor. b) is a chemical that increases the effect of a neurotransmitter. c) is a chemical that cancels out the effect of a neurotransmitter. d) all of the above. e) none of the above. 47) Voltage gated ion channels: a) are membrane bound proteins. b) typically allow Na+ ions to cross a cell membrane. c) are activated by a departure from resting potential. d) initiate an action potential. e) all of the above. 48) Signal transduction: a) is how peptide hormones get their message to the DNA. b) require a second messenger. c) require peripheral proteins. d) all of the above. e) none of the above. 49) An extremely strong stimulus such as a loud noise or heavy pressure on a fingertip: a) will generate a single very large action potential. b) will generate a very small graded potential. c) will generate a rapid series of action potentials. d) will not generate an action potential. e) none of the above. 50) The absolute refractory period: a) lasts about 200 mSec. b) is due to a lack of Na and K ions. c) is due to the K+ Channel gates resetting. d) all of the above. e) none of the above. Please choose the correct answer of the following:
21) Acetylcholinesterase: a) is the neurotransmitter in the sympathetic nervous system. b) is the neurotransmitter in the parasympathetic nervous system. c) is inactivated by organo-phosphate insecticides. d) all of the above. e) none of the above. 22) Receptor-mediated endocytosis: a) is how cells secrete proteins. b) is how the golgi apparatus receives specific proteins from the ER. c) is how cells absorb specific molecules. d) is how cells release CO2. e) is how cells absorb water. 23) Cotransport: a) is a way of moving large molecules across membranes. b) is how glucose enters cells. c) harnesses energy released by diffusion of smaller particles. d) requires energy. e) all of the above 24) Cell membranes: a) contain proteins. b) contain cholesterol. c) contain phospholipids. d) are selectively permeable e) all of the above. 25) Phospholipids: a) are hydrocarbons with phosphate heads. b) form selectively permeable membranes. c) are amphipathic. d) all of the above. e) none of the above. 26) Transmembrane proteins: a) attach to one side of a cell membrane. b) typically function as ion channels. c) are made of phospholipids. d) are made of cholesterol. e) all of the above. 27) The sodium-potassium pump: a) generates resting potential. b) pumps three sodium ions out of a cell for every two potassium ions it pumps into a cell. c) consumes energy. d) is used in active transport. e) all of the above. 28) Peripheral bound proteins: a) are typically ion channels. b) open up to allow large molecules to cross cell membranes. c) include the Na/K pump. d) may serve a structural function. e) all of the above. 29) The cis-face of a plasma membrane: a) faces the extracellular fluid. b) faces the intracellular fluid. c) is virtually identical to the trans-face of a plasma membrane. d) contains lots of hormone receptors. e) none of the above. 30) Cyclic AMP: a) easily crosses cell membranes. b) is a “second messenger”. c) occurs on the trans-face of a cell membrane. d) all of the above. e) none of the above. 31) Steroid hormones: a) easily cross cell membranes. b) require a second messenger. c) dissolve readily in the bloodstream. d) none of the above. e) all of the above. 32) Osmolarity: a) refers to the concentration of salt per liter of water. b) refers to the amount of dissolved particles per kilogram of water. c) refers to the total concentration of dissolved particles per liter of water. d) is higher with glucose than salt. e) none of the above. 33) Facilitated diffusion: a) requires transmembrane proteins. b) utilizes an existing concentration gradient. c) may require a little energy to open the protein channel. d) is otherwise a form of passive transport. e) all of the above. 34) Active transport: a) pumps materials against a concentration gradient. b) releases energy. c) utilizes an existing concentration gradient. d) all of the above. e) none of the above. 35) A post-synaptic bulb: a) contains synaptic vesicles. b) contains chemical gated ion channels. c) occurs at the end of an axon-terminal. d) occurs on a Schwann cell. e) none of the above. 36) A pre-synaptic bulb: a) contains neurotransmitter receptors. b) contains chemical-gated ion channels. c) occurs at the end of a dendrite. d) contains synaptic vesicles. e) none of the above. 37) A graded potential: a) occurs on an axon. b) maintains its full strength over the entire distance it travels. c) is generated in the trigger zone. d) all of the above. e) none of the above. 38) An action potential: a) occurs on an axon. b) maintains its full strength along the entire distance of travel. c) is generated in the trigger zone. d) all of the above. e) none of the above. 39) Threshold potential: a) is typically -45mV. b) is the maximum depolarization a neuron can stand before being permanently damaged. c) id typically -70mV. d) may reach -90mV. e) none of the above. 40) The presence of myelin: a) reduces threshold potential. b) eliminates the need for neurotransmitters. c) makes neurotransmitters diffuse much faster. d) speeds up the rate of osmosis. e) blocks the activity of acetylcholinesterase. 41) Ganglia: a) are clusters of myelinated cell bodies. b) transmit action potentials at speeds of up to 450 miles per hour. c) are found only in the CNS. d) consist of mainly white matter. e) none of the above. 42) Which of the following does not belong? a) myelin. b) acetylcholine. c) dopamine. d) epinephrine. e) adrenaline. 43) Which of the following does not belong? a) Na+ b) Cl- c) Glucose. d)K+ e) Ca2+ 44) Which of the following is not found in a monosynaptic reflex? a) receptor. b) sensory neuron. c) interneuron. d) motor neuron. e) effector. 45) If you stepped on a thumbtack while carrying a bag full of groceries, you would employ a: a) simple reflex. b) ipsilateral reflex. c) crossed extensor reflex. d) all of the above. e) none of the above, you’d just swear a lot. 46) An agonist: a) is a chemical that competes with a neurotransmitter for a receptor. b) is a chemical that increases the effect of a neurotransmitter. c) is a chemical that cancels out the effect of a neurotransmitter. d) all of the above. e) none of the above. 47) Voltage gated ion channels: a) are membrane bound proteins. b) typically allow Na+ ions to cross a cell membrane. c) are activated by a departure from resting potential. d) initiate an action potential. e) all of the above. 48) Signal transduction: a) is how peptide hormones get their message to the DNA. b) require a second messenger. c) require peripheral proteins. d) all of the above. e) none of the above. 49) An extremely strong stimulus such as a loud noise or heavy pressure on a fingertip: a) will generate a single very large action potential. b) will generate a very small graded potential. c) will generate a rapid series of action potentials. d) will not generate an action potential. e) none of the above. 50) The absolute refractory period: a) lasts about 200 mSec. b) is due to a lack of Na and K ions. c) is due to the K+ Channel gates resetting. d) all of the above. e) none of the above.
Explanation / Answer
Ans.21.
The choice is (c)
Acetylcholinesterase is an enzyme which breaks down Acetylcholine into acetyl and choline. Acetylcholinesterase is inhibited by pesticides such as organophosphate hence acetylcholinesterase is not available to breakdown Acetylcholine.
Ans.22.
The choice is (c)
Receptor mediated endocytosis is the process by which cell absorbs specific molecules like proteins, hormones, metabolites by inward budding of cell membrane.
Ans.23.
The choice is (e)
Cotransporter is the mechanism by which larger molecules including glucose enters the cell in presence of energy.
Ans.24.
The choice is (e)
Cell membrane is composed of proteins, cholestetol and phospholipids and is selectively permeable to ions and organic molecules.