Quiz
5-physiology
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Perguntas do quiz (30)
1MC. Which of the following statements about acute local potential are correct?
- Alocal acute potential follows the principle "all-or nothing"
- Blocal acute potential travels alongside the cell membrane without decay in value;
- Clocal acute potential is a graded potential;
- Dlocal acute potential can summate;
- E) local acute potential travels alongside the cell membrane with decay in value;
2 MC. Which of the following statements about propagation of excitation are
correct?- Ait propagates only distally from the place of excitation;
- Bit propagates bilaterally from the place of excitation;
- Cif one fiber in nerve trunk is excited, it propagates isolated from other fibers;
- Dit stops once functional integrity of nerve fiber is impaired;
- Ethe propagation is delayed in nodes Ranvier;
3MC. The excitation is transmitted in neuromuscular junction:
- Aone way;
- Bwith delay
- Cwithout delay;
- Din both directions
- Ewith acceleration
4 MC. The propagation of the nervous impulse:
- Ais saltatory in myelinated fibers;
- Bis continuous in myelinated fibers;
- Cis saltatory in unmyelinated fibers;
- Dis faster in unmyelinated fibers than in myelinated;
- Eis faster in myelinated fibers than in unmyelinated
5 SC. Which of the following statements is NOT correct:
- Athe cell membrane has G proteins
- Bthe cell membrane has ionic channels;
- Cthe cell membrane has carrier proteins;
- Dthe cell membrane has receptor proteins;
- Ethe cell membrane has contractile proteins
6MC. Which of the following statements is correct:
- Adiffusion occurs via carrier proteins;
- Bdiffusion occurs via exocytosis;
- Cdiffusion occurs via ionic channels;
- Ddiffusion occurs via phospholipid bilayer;
- Ediffusion occurs via ionic pumps;
7MC. Which of the following statements about resting membrane potential
(RMP) is correct:- ARMP depends on the ion concentrations on both sides of cell membrane
- Bthe intensity of stimulus determines the value of RMP;
- CRMP depends on selective permeability of the cell membrane for ions;
- DNa+/K+ pump activity maintains the RMP;
- ERMP is created by continuous Ca2+ influx
8MC. The hyperpolarization is associated with:
- Alower excitability because the value of resting membrane potential is greater
- Bhigher excitability because the value of resting membrane potential is less;
- Clower excitability because the threshold is greater
- Dhigher excitability because the threshold is less;
- Ehigher excitability because the threshold is greater
9 MC. Which of the following statements is correct:
- Athe decrease of resting membrane potential leads to a higher threshold;
- Bdepolarization leads to decrease of excitability;
- Chyperpolarization causes a higher threshold
- Dan increased threshold shows a decrease in excitability;
- Ehyperpolarization doesn't change the excitability;
10MC. Which of the following statements about action potential is correct?
- Ait occurs as result of over threshold stimulus;
- Bit occurs as result of subthreshold stimulus;
- Cit occurs as result of threshold stimulus;
- Dit obeys the "all-or-nothing" principle;
- Eit can summate;
11MC. How a certain substance can be transported against its concentration
gradient?- Aprimary active transport;
- Bfacilitated diffusion;
- Cionic channels
- Dsimport
- Eosmosis
12SC. Which of the following statements is correct?
- Afiltration is the movement of water molecules from low hydrostatic pressure to
high hydrostatic pressure; - Bosmosis is the movement of water molecules from high osmotic pressure to low
osmotic pressure; - Csolvent drag is attraction of water by proteins;
- Dthe water diffusion occurs via ionic channels;
- Eosmosis is the movement of water molecules from low osmotic pressure to high
osmotic pressure
- Afiltration is the movement of water molecules from low hydrostatic pressure to
13SC. Diffusion rate of certain substance rises if:
- Amembrane area decreases;
- Bmembrane thickness increases;
- Csize of the particles increases;
- Dconcentration gradient of this substance decreases;
- Eliposolubility of this substance increases;
14 SC Diffusion rate of certain substance rises if:
- Amembrane area decreases
- Bmembrane thickness increases
- Csize of the particles increases;
- Dliposolubility of this substance decreases
- Econcentration gradient of this substance increases;
15SC Diffusion rate of certain substance rises if:
- Amembrane area increases;
- Bmembrane thickness increases;
- Csize of the particles increases;
- Dconcentration gradient of this substance decreases
- Eliposolubility of this substance decreases;
16 MC. Which of the following statements is correct?
- Athere is co-transporter for Na+ and water
- Bthere is co-transporter for Na+ and H+;
- Cthere is co-transporter for Na+ and Ca2+
- Dthere is co-transporter for Na+ and glucose;
- Ethere is co-transporter for Na+ and amino acids
17. MC. Which of the following statements is correct?
- Athere is antiport for Na+ and K+;
- Bthere is antiport for Na+ and glucose;
- Cthere is antiport for Na+ and amino acids;
- Dthere is antiport for Na+ and Ca2+;
- Ethere is antiport for Na+ and H+
18. SC. Which of the following statements is NOT correct?
- ANa+/K+ pump moves K+ into the cell;
- BNa+/K+ pump needs ATP;
- CNa+/K+ pump exchanges 3 intracellular Na+ ions for 2 extracellular K+ ions
- DNa+/K+ pump evacuates Na+ from the cell;
- ENa+/K+ pump exchanges 2 intracellular Na+ ions for 3 extracellular K+ ions;
19SC. The sarcolemma of skeletal muscle fiber:
- Ais sensible to acetylcholine everywhere;
- Bis not sensible to acetylcholine;
- Cis sensible to acetylcholine only at the neuromuscular junction;
- Dis sensible to glutamate only at the neuromuscular junction;
- Eis sensible to glutamate everywhere;
20SC. The muscle tone is determined:
- Aby level of ATP in muscle fiber;
- Bby level of phosphocreatine in muscle fiber;
- Cby number of myofibrils;
- Dby level of Ca2+ ions in sarcoplasmic reticulum;
- Ethe muscle tone is determined by number of active motor units and their
discharge rate
21. MC. The sarcomere is the morphofunctional unit of:
- Amuscle fiber;
- Bmyofibril
- Csarcolemma
- Dmuscle
- Esarcoplasmic reticulum
22 SC The sarcomere is the morphofunctional unit of:
- Amotor end plate;
- Bmyofibril
- Csarcolemma
- Dmuscle
- Esarcoplasmic reticulum;
23SC The sarcomere is the morphofunctional unit of:
- Amotor end plate;
- Bsarcolemma
- Cmuscle
- Dsarcoplasmic reticulum;
- Emuscle fiber;
24SC. Which event DOES NOT occur during latent phase of contraction?
- Aaction potential spreads alongside the sarcolemma and enters T tubules;
- BK+ inflow occurs;
- CCa2+ ions are released
- DATP is massively hydrolyzed;
- Ethe activation heat is produced;
25MC. Which of the following statements about filaments of myofibrils are NOT
correct?- Amyosin is a protein from thick filaments;
- Bmyoglobin is a protein from thick filaments
- Cactin is a protein from thin filaments;
- Dtroponin is a protein from thick filaments
- Etropomyosin is a protein from thin filaments;
26 MC. Which of the following statements is NOT correct?
- Athe decrease of resting membrane potential leads to a higher threshold;
- Bdepolarization leads to decrease of excitability;
- Chyperpolarization causes a higher threshold
- Dan increased threshold shows a decrease in excitability
- Ehyperpolarization doesn't change the excitability
27 SC. Muscle tension is maximal
- Awhen extracellular Ca2+ decreases;
- Bwhen intracellular Mg2+ increases
- Cin case of incomplete tetanus
- Din case of complete tetanus
- Ein case of twitch;
28 MC. Which of the following statements is NOT correct?
- Adiffusion occurs via carrier proteins;
- Bdiffusion occurs via exocytosis
- Cdiffusion occurs via ionic channels
- Ddiffusion occurs via phospholipid bilayer;
- Ediffusion occurs via ionic pumps
29SC. Tropomyosin:
- Atriggers the release of Ca2+ ions from sarcoplasmic reticulum
- Btriggers the polymerization of globular actin;
- Chydrolyzes the ATP;
- Dconnects the myosin molecules;
- Eprevents the interaction between actin and myosin;
30 MC. When skeletal muscle is passively stretched, what changes will occur in
sarcomere?- AA band stretches
- BI band stretches
- CH band stretches;
- Dthin filaments stretch;
- Ethick filaments stretch;
Informações
- Descrição
- Quiz sobre 5-physiology, criado por Anastasia Goncearuc em 01-06-2025.
- Autor
- Anastasia Goncearuc
- Idioma
- English
- Visualizações
- 4
- Etiquetas
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