Curare is a dangerous poison extract from plants that can block the binding site of Acetylcholine receptor channels in neuromuscular junctions. Which of the following molecular events will curare directly inhibit or prevent from occurring? Action potential traveling down the sarcoplasmic reticulum End-plate potential forming Release of calcium ions from the sarcoplasmic reticulum Release of Acetylcholine from axon terminals

Q: b) scorpion, he felt numbness in his fingers due to the neurotoxin produced by the scorpion which is…

A: Scorpion Venom would affect the duration and amplitude of an action potential.

Q: The Structure of the acetylcholine receptor is shown below:   C. What type of channel is the…

A: Introduction The acetylcholine receptor is an integral membrane protein receptor that is activated…

Q: Therefore, a muscle cell at rest is said to be __________________ and has membrane potential.

A: An abrupt, quick, transient, and propagating shift in the resting membrane potential is referred to…

Q: Action potential ente from adjacent cell. 1 Ca2+ 2 K* 3 Na* Ca2+ ЕCF ATP NCX ICF 3 Na* RyR Ca2+…

A: The muscle contraction of myocardial cells is activated with the help of specific stimulus that…

Q: hemidiaphragm skeletal muscle preparations. Describe the process of synaptic transmission at the…

A: A neuromuscular junction or NMJ is a specific type of synapse formed between a motor neuron and the…

Q: Which of the following structures has activity like acetylcholine?

A: Acetylcholine is acetylcholine which is an ester of acetic acid and choline. Acetylcholine is a…

Q: The specialized post-synaptic portion of a neuromuscular junction is called a pick one: motor…

A: Individual motor units, each of which contains a single motor neuron and all the muscle fibers it…

Q: Which part of the phosphatidylcholine molecule would be the most non-polar (hydrophobic)? the…

A: Phosphatidylcholine is a type of phospholipid with choline acting as the head group. It is the major…

Q: As mentioned in class, one additional major use of ATP in skeletal muscle (besides powering the…

A: Assumptions:The volume of a single sarcomere is roughly cylindrical.The average diameter of a…

Q: Which part of the phosphatidylcholine molecule would be the most negatively-charged? the fatty acid…

A: Phosphatidylcholine – it is a phospholipid, a major constituent of the cell membranes. Phospholipids…

Q: neuron of the median giant fiber of an earthworm would respond to an increased intensity of a…

A: Every cell membrane remains in a polarized state that is in a charged state. Whenever a response has…

Q: If depolarization occurs at the neuromuscular junction and threshold is met, then…

A: If depolarization occurs at the neuromuscular junction and threshold is met, then, the…

Q: Myasthenia gravis is a disease that leads to a marked decrease in the number of acetylcholine (Ach)…

A: Given:- Each quantum of Ach opens only 200 Ach receptor-channels instead of the normal 2000.- Each…

Q: a) Why are muscles not in a contracted state all the time? b) Several hours after the death of an…

A: Muscles These are defined as the soft tissues that are involved in the movement of the body and in…

Q: Which of the following is a correct functional match for CGMP? A Opens calcium ion channels Smooth…

A: B-Smooth muscle relaxation cGMP is a typical controller of particle channel conductance,…

Q: After an action potential has been initiated, there are two processes that prevent the membrane from…

A: The generation of action potential is very much important characteristics in nerve cells that is…

Q: Put these events that occur in skeletal muscle in the correct chronological sequence: 1. Activation…

A: The membrane potential on the T-tubule membrane is sensed by a protein called the dihydropyridine…

Q: Jose measures membrane potential in two neighboring cells. He notices that when the membrane…

A: Membrane potential It refers to the difference in electric potential between the interior and the…

Q: If ligand-gated K+ channels were to open in an unstimulated muscle fiber,how would this affect the…

A: The ligand-gated channels are those channels that open in response to the ligand which could be…

Q: In the rare neuromuscular disorder Myasthenia Gravis, autoantibodies are produced which inhibit…

A: Introduction:-  Myasthenia Gravis is a disease of neuromuscular junction in which the acetylcholine…

Q: describe what the resting membrane potential of a cell is. What is the resting membrane potential of…

A: Resting membrane potential occurs because of changes in permeability of membrane for…

Q: A motor unit associated with the stimulation of skeletal muscle is designated as a 1:8 motor unit.…

A: A motor unit is made up of a motor neuron and the skeletal muscle fibres innervated by that motor…

Q: During synaptic transmission, neurotransmitters help to open gates on the postsynaptic skeletal…

A: Excitation in pre-synaptic membrane => opening of calcium ion VGIC (voltage gated ion…

Q: What does rhe binding of ACh to nicotinic receptors of skeletal muscle cells directly cause?…

A: Muscle contraction is the activation of tension-generating sites within muscle fibers. In…

Q: Which of the following step(s) about the excitation of skeletal muscle is/are incorrect?   1.…

A: Muscle contraction is an example of a complex biological process. The excitation of skeletal muscle…

Q: During an experiment, the protein troponin from a skeletal muscle fiber was removed. This resulted…

A: The muscle contraction involves interaction between actin (thin filament) and myosin (thick…

Q: If acetylcholinesterase fails to function properly at the neuromuscular junction, which of the…

A: The neurons are specialised cells of the human nervous system. The neurons of the nervous system…

Q: At what point during excitation contraction coupling does exocytosis play a role? Group of answer…

A: Excitation - contraction coupling in the skeletal muscle is the sequence of events through which the…

Q: Which of the following pairs of terms is correctly matched?   Voltage-gated calcium channels :…

A: Correctly matchedTransmission of chemical synapses occurs when a nerve impulse reaches the…

Q: Match the following regarding muscle contractions: The final chemical messenger and "trigger" for…

A: The neuron is the part of nervous system. It is responsible for transmitting the message in the form…

Q: The action potential generated in the squid giant axon requires voltage-gated potassium channels.…

A: * Voltage gated potassium channels are transmembrane proteins that opens in response to…

Q: When nerve cells contact each other, they form adherens junctions (AJs) at the point of contact. The…

A: Nerve cells transmit signals from one to another. When they do this, adheren junctions are formed…

Q: Please describe the connection between neurotransmitters and sarcomeres

A: Sarcomere is repeating contractile unit of myofibrils. It is the segment between the two Z lines.…

Q: Draw a presynaptic and postsynaptic neuron at to demonstrate the release and acceptance of a…

A: SNARE protein play important role in release of neurotransmitter from synaptic vesicles  as they…

Q: The following events happens in neuromuscular junction, putthese events in the correct temporal…

A: In skeletal muscles, cells' contraction occurs after the release of calcium ions by the neural…

Q: BONUS: Which statement describes the correct order for neurotransmitter release from the pre…

A: Neurons deliver electrical impulses through neurotransmitters. The body's chemicals are electrically…

Q: 13) Draw a graph representing the changes in membrane potential across the axonal membrane before,…

A: The electric signals that flow down the dendrites to form a nerve impulse or an action potential are…

Q: re these True or False? Receptors on the post-synaptic cell membrane that bind the acetylcholine…

A: When two molecules of acetylcholine bind a nicotinic Acetylcholine receptor, a conformational change…

Q: Why is myosin II the only myosin capable of producing contractile force?

A: Introduction Myosins are a group of motor proteins that play a key role in muscle contraction and a…

Q: Place the following events in chronological order from 1-8: Nat enters the cell, and depolarization…

A: Neurons have the capability of generating and transmitting nerve impulses by transporting specific…

Q: What kind of receptor is found on the postsynaptic cell in a neuromuscular junction?

A: In order to transmit signal from origin to its destination, many neurons are required and these…

Q: hen an action potential arrives at the nerve terminal of a neuromuscular junction, which of the…

A: An action potential is a brief electrical signal that travels along the membrane of a neuron or…

Q: the following structure will carry efferent impulses from central nervous system to skeletal muscles…

A: The image shown above represents the cross-sectional view of the spinal cord, an integral part of…

Q: In muscles, acetylcholine is released by the _________________________and opens specific channels…

A: Answer : Motor  neuron , Sodium Ion

Q: Myasthenia gravis is a disease that leads to a marked decrease in the number of acetylcholine (Ach)…

A: Given that only 200 Ach receptor-channels are opened by each quantum of Ach, and each open channel…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.