Spatial summation - Study guides, Class notes & Summaries

When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate. - ANSWER TRUE Briefly explain why the action potential flows only from the axon hillock to the terminal web. - ANSWER During the course of an action potential there is a refractory period that makes sure the action potential can't trigger backwards by the use of caps on gated sodium channels. The caps close and keeps the action potential flowing in one direction. How do the glial cells (i.e., m...

In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it correct answer: Fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold A postsynaptic neuron responds to neurotransmitters released by a presynaptic neuron by creating correct answer: Either EPSPs or IPSPs Wallerian degeneration refers to correct answer: Degeneration of the distal end of axon and myelin sheath after ...

BIO 235 Assignment 2 Questions and Answers 100% Pass With regards to effort and load, describe the main difference between a lever operating with a mechanical advantage versus a lever operating at a mechanical disadvantage. - Answer- a. Mechanical advantage- If the load is closer to the fulcrum and the effort farther from the fulcrum, then only a relatively small effort is required to move a large load over a small distance.Mechanical disadvantage- If the load is farther from the fulcrum ...

What kind of receptors are changes in blood pH and pressure detected by? - ANSWERchemoreceptors and pressure receptors in the aorta or carotid artery Two types of photoreceptors in the eye? - ANSWERrods and cones What colour do rods detect and why? - ANSWERBlack and white ONLY - because they can't distinguish between wavelengths of light What kind of light intensity do rods detect and why? - ANSWER- Rods detect low light intensity - because many rods connect to one sensory neurone (R...

Edexcel A level Biology Exam Questions and Answers Molecular phylogeny - Answer-It compares the structure of a particular molecule from different organisms to discover their degree of evolutionary relation. Somatic cell - Answer-A cell in an organism which isn't a gamete. DNA - Answer-Deoxyribose nucleic acid. Carries the genetic information for cells and some viruses. mRNA - Answer-Messenger ribose nucleic acid (single stranded). The product of transcription. Speciation - Answer-The p...

MCAT - Bio/Biochem Exam Practice Questions and Answers Graded A defunct mRNA translation in bacteria would... - Correct Answer ️️ -prevent cells from replicating. lysogenic cycle - Correct Answer ️️ -a viral reproductive cycle in which the viral DNA is added to the host cell's DNA and is copied along with the host cell's DNA Lytic phase or lytic cycle - Correct Answer ️️ -phage replicates immediately, destroying the host cell (All phages carry out this life cycle) protein p...

Depolarization, Summation, and Neural Pathways Questions And Answers Depolarization - ANS-Action potential depolarizes synaptic knob Secondary Messenger - ANS-Ca enters axoplasm triggering norepi First Messenger - ANS-norepi binds to receptor site causing adenyl cyclase within the cytoplasm to catalyze the formation of cyclic AMP from ATP Second Messenger - ANS-cyclic AMP opens ion channels allowing NA to depolarize membrane Summation - ANS-Integration of EPSP's and IPSP's to reach depo...

Edexcel A level Biology Exam Questions and Answers Molecular phylogeny - Answer-It compares the structure of a particular molecule from different organisms to discover their degree of evolutionary relation. Somatic cell - Answer-A cell in an organism which isn't a gamete. DNA - Answer-Deoxyribose nucleic acid. Carries the genetic information for cells and some viruses. mRNA - Answer-Messenger ribose nucleic acid (single stranded). The product of transcription. Speciation - Answer-The p...

Which of these statements about the neuromuscular junction is accurate?Binding of acetylcholine to the nicotinic receptor on the motor end-plate causes an influx of Na+ and efflux of K+ through the receptor Which of these is not an example of primary active transport of ions across cell membranes?The sodium-glucose co-transporter on intestinal cells GABA is an inhibitory neurotransmitter that causes the membrane to hyperpolarize. From this information, what type of ion channel does GAB...

ASU Bio 181 Quiz 4 Latest Update Graded A+ (T/F) Acetylcholine esterase breaks acetylcholine into muscarinic acid False (T/F) Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell. True (T/F) Excitatory synapses cause depolarization of the post-synaptic cell. True (T/F) Excitatory synapses cause hyperpolarization of post-synaptic cells. False (T/F) Excitatory synapses make the post-synaptic ce...