Zadanie 17
The trace shows a neuronal action potential. At which labelled region do voltage-gated sodium channels open during this action potential? A. P B. R C. Q D. S
- Materiał graficzny
Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Baza zadań
Wybierz umiejętność, rok lub poziom trudności. Każde zadanie ma klucz i schemat punktowania.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1558 zadań
The trace shows a neuronal action potential. At which labelled region do voltage-gated sodium channels open during this action potential? A. P B. R C. Q D. S
A neonicotinoid insecticide disrupts communication between neurons in an insect. What molecular interaction is responsible? A. Cleaving acetylcholine into glucose and phosphate B. Blocking protein synthesis in the insect’s bacterial symbionts C. Binding to…
The axons shown are at the same temperature. Which is expected to conduct an action potential most slowly? A. P B. S C. Q D. R
A cocaine molecule binds to a dopamine transporter in a presynaptic membrane. Which immediate effect accounts for its influence on synaptic communication? A. Dopamine removal from the synaptic cleft is reduced B. Dopamine is converted directly into…
In this constructed dataset, exercise begins at 0 minutes and epinephrine infusion begins at 25 minutes. Which signalling event can account for the subsequent difference from the control? A. The receptor permanently destroys cyclic AMP B. A receptor activates…
Two drug actions at synapses are summarized. Which interpretation is correct? A. Q fits cocaine because it seals every postsynaptic ion channel B. P fits neonicotinoids because it converts transmitter into protein C. P fits cocaine because it reduces…
Which event can occur in both mitosis and meiosis? A. A diploid chromosome number is halved in each daughter nucleus B. Homologous chromosomes form bivalents before the first division C. Exchange of chromosome segments is obligatory in every division D.…
Which feature is common to benign and malignant tumours in the standard model of tumour development? A. Both always invade every adjacent tissue B. Both grow as perfectly spherical masses C. Both arise from accumulated changes that disrupt control of cell…
A schematic records the shapes of mammalian red blood cells after immersion in a test solution. What can be deduced from their appearance? A. The external solution has a lower solute concentration and the cells have swollen B. The external solution is…
Identical twins differ in methyl-group attachment to amino-acid residues of proteins associated with one chromosome. Which interpretation best fits the observation? A. One twin has a different order of DNA bases at every gene B. Both twins must have identical…