During the depolarisation - Study guides, Class notes & Summaries

HUBS 191 Progress Test II Latest Version Graded A Nervous system cells neurons and glia Neuron input zone dendrites and cell body Neuron summation zone axon hillock Neuron conduction zone axon Neuron output zone axon terminals Axon hillock decides whether to pass on information Tract axon bundles in CNS Grey matter cell bodies in CNS White matter myelinated axons in CNS; commissural, projection, and association tracts Ganglion groups of cell bodies in PNS Nerv...

HUBS 191 Nervous System Latest Update 100% Solved Resting membrane potential -70mV Open Voltage gated ion channels are ? at -60mV Inactive Voltage gated ion channels are ? at+30mV Na+ Extracellular fluid as a high ? concentration and is therefore positive in comparison to the ICF K+ Intercellular fluid has a high ? concentration and is therefore slightly negative in comparison to the ECF Depolarisation The change from a negative resting potential to a positive action poten...

Cardiovascular System Practice Questions Guaranteed A+ The muscles that contract to tension the chordae tendinae are called a. Atrioventricular node b. Atrial myocardium c. Papillary muscles d. Pectinate muscles ️C. Blood flowing through the heart travels from the right atrium to the right ventricle then up through the semilunar valve into the ___________ on its way to the lungs a. Aorta b. Inferior vena cava c. Pulmonary arteries d. Pulmonary veins e. Superior vena ca...

CMB1004 Excitable Cells Exam Questions With 100% Verified Answers What are the four regions of a neurone? - answerDendrites Cell Body Axon Axon Terminal Define an excitable cell - answerAny cell capable of generating an action potential Describe how the resting potential is maintained - answerCell contains slight -ve charge (70mv) Maintained via high permeability of membrane to K+ and active transport of Na+ across membrane Define an action potential - answerA rapid change in membrane...

HUBS 191 Nervous System Exam Questions and Answers |100% Verified and Updated 2024 Resting membrane potential -Answer--70mV Open -Answer-Voltage gated ion channels are ? at -60mV Inactive -Answer-Voltage gated ion channels are ? at+30mV Na+ -Answer-Extracellular fluid as a high ? concentration and is therefore positive in comparison to the ICF K+ -Answer-Intercellular fluid has a high ? concentration and is therefore slightly negative in comparison to the ECF Depolarisation -Answer-The ...

The term (i) denotes: - correct answer ionic current The term (g) denotes: - correct answer conductance During the resting phase, the membrane is only permeable to ___ , and this ion is most concentrated ___ the cell. - correct answer K+ Inside How is the resting potential maintained? - correct answer Na+ / K+ pump What are three successive occurrences during the depolarisation phase? - correct answer 1. Na+ channels open, causing an influx of Na+ 2. Vm shifts towards ENa 3. As Ek...

AQA A Level Topic 6 Organisms and response Stimulus A change in an organism's surroundings that causes the organism to react Receptor Detect stimulus. Specific to one type of stimulus. Effector an organ or cell that acts in response to a stimulus. Stimulus response pathway Stimulus - receptor - coordinator - effector - response taxis Movement toward or away from a stimulus. Direction of response determined by direction of the stimulus. positive taxis negative taxis Photota...

Resting membrane potential - ️️-70mV Open - ️️Voltage gated ion channels are ? at -60mV Inactive - ️️Voltage gated ion channels are ? at+30mV Na+ - ️️Extracellular fluid as a high ? concentration and is therefore positive in comparison to the ICF K+ - ️️Intercellular fluid has a high ? concentration and is therefore slightly negative in comparison to the ECF Depolarisation - ️️The change from a negative resting potential to a positive action potential (caus...

Describe the events of fertilisation that occur after the acrosome reaction. -Membrane of sperm and egg cell fuse together -cortical granules release contents into zona pellucida -Zona pellucida thickens -Haploid nuclei fuse Explain how phospholipids form a cell surface membrane -Hydrophilic parts associate with water -Hydrophobic parts repel water -a bilayer forms with hydrophobic parts pointing in towards the centre of the bilayer Describe the role of the CFTR protein in e...

HUBS 191 Nervous System Exam Questions and Answers |100% Verified and Updated 2024 Resting membrane potential -Answer--70mV Open -Answer-Voltage gated ion channels are ? at -60mV Inactive -Answer-Voltage gated ion channels are ? at+30mV Na+ -Answer-Extracellular fluid as a high ? concentration and is therefore positive in comparison to the ICF K+ -Answer-Intercellular fluid has a high ? concentration and is therefore slightly negative in comparison to the ECF Depolarisation -Answer-The ...