At a Neuromuscular junction the nerve impulse travels through the: A. Pores in the membrane B. Cytoplasmic streaming C. Calcium channels D. Synapse
Q: The dark A band of a sarcomere contains regions where the actin and myosin filaments overlap. True…
A: The sarcomere is the basic unit of muscle fibers that is responsible for the contractile function.…
Q: What happens if ATP is not available in the sliding filament theory? When is the maximum force…
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Q: 30- Which of the following is true about muscle contraction: a- Results by the actin sliding along…
A: Muscle contraction us the tightening , shortening or lengthening of muscles when you do some…
Q: 2. Which of these activities is not related to the muscular system? A. The secretion of hormones…
A: Since there are multiple questions in this particular question, I will answer the first one for you.…
Q: Myosin
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Q: 2.If you were running an experiment and interrupted the interaction between thin and thick…
A: Introduction :- When a sarcomere (a) contracts, the Z lines become closer together and the I band…
Q: 18- Fusing the presynaptic vesicle with the presynaptic membrane is a function. А. К+ B. CL- C. Na+…
A: Answer D. Ca+2
Q: 10. Which of the following is a calcium release channel? A)Ryanodine receptor B)Tropomyosin C)DHP…
A: A calcium channel can be defined as an ion channel that is selectively permeable to the calcium…
Q: 1. Synaptic vesicles store calcium 2. Long bone grows in length as a result of endochondral…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. If you need help with other sub…
Q: 9. Which of the following correctly describes the end plate potential (EPP)? A)It is primarily…
A: End plate potentials (EPPs) are the voltages which cause depolarization of the muscle fibers caused…
Q: 29- Which of the following binds to Ca to trigger muscle contraction: A. Tropomyosin B. Troponin C.…
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Q: 20- Depression of action potential can be caused by: A. Inactivation of Ach esterase C. The flow of…
A: Action potential is defined as a change in electric potential, which is the difference in charge…
Q: 22. Biology is study of all forms of life. A. True B. False ____ 23. Hinge joints move in one…
A: Living things are made up of cells and it is the basic unit of life. All living things can…
Q: In 2013, Zach Bitter set a new record for running a 100 mile Ultra-Marathon in less than 12 hours.…
A: The muscle fiber is an individual muscle cell that consists of hundreds or thousands of myofibrils.…
Q: True or False
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: The Ca2+ required for skeletal muscle contraction, O A. Is released from mitochondria B. Is released…
A: when the nerve impulse is activated that is action potential comes in muscle contraction…
Q: 5. Cardiac muscle cells have the unique ability to demonstrate ________. A. graded strength B.…
A: The heart is a muscular organ liable for maintenance of blood flow. It achieves that work by its…
Q: 5. fibers are strong but flexible and recoil. 6. The fluid connective tissues are and 7. The main…
A: Tissue: The Tissue is a group of cells that have similar structure and that function together as a…
Q: 4. Draw and label a neuromuscular junction showing how a nerve impulse stimulates muscle…
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Q: 17. Which of the following choices is CORRECT? A. Myofibrils extend the length of a muscle fibre B.…
A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…
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A: Introduction: Regeneration is the rebuilding of missing tissues or organs in response to injury.
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Q: 3- a muscle contracts more forcefully if: a- its motor units contracted simultaneously. b- the…
A: Muscle contraction is regulated through the the function of alpha motor neuron/lower motor neurone…
Q: List the events occur at the neuromuscular junction.asap
A: Introduction The neuromuscular junction, also known as the myoneural junction, is where a nerve…
Q: 1. Synaptic vesicles store calcium 2. Long bone grows in length as a result of endochondral…
A: Bones and muscles work together to help us move. They also perform other functions that help us grow…
Q: 9. The binding of the myosin head to the free binding site of the actin filament results in the…
A: Introduction Actin and myosin, coupled with the regulatory proteins known as troponin, tropomyosin,…
Q: 1. What is a neuromuscular junction? What takes place at the neuromuscular junction?
A: A neuron is a nerve cell that is excited and transmits its signals down the line. It takes messages…
Q: 17. Which of the following choices is CORRECT? A. Myofibrils extend the length of a muscle fibre B.…
A: Muscle is a soft tissue that helps in movement of the body, maintains posture, and circulates blood…
Q: 8. Which of the • A. The next contraction will be bigger than the previous contraction. • B. The…
A: Answer. Calcium ions are very important for muscle contraction. When a muscle is initiated by an…
Q: 2 a) What does calcium do in a skeletal muscle cell and where in the cell does it come from?…
A: Skeletal muscle contraction is a complex phenomenon and involves various processes requiring special…
Q: Which neurotransmitter triggers a muscle contraction?
A: The chemical compound that work as messenger transmit message across the synapse from a nerve cell…
Q: 1) Describe in detail the process of synaptic transmission at the neuromuscular junction.
A: Synaptic transmission at neuromuscular junction: The neuromuscular junction is a connection between…
Q: 15- the membrane potential if the [Na+] outside, inside = A. (+) B. (-) C. (+) D. (+)
A: Depolarization occurs when sodium ions enter inside the cell. This changes the membrane potential.
Q: Heart muscle cells ______. A will not contract unless acetylcholine is released at a…
A: Cardiac muscles are known as Myocardium.Cardiac muscles are different from skeletal muscle because…
Q: 1. Which of the following divisions of the nervous system is first to transmit sensory information…
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Q: 4. As skeletal muscle shortens with contraction, the length of the I band remains constant as the…
A: Histology is the study of the microanatomy of cells, tissues, and organs as seen through a…
Q: 15.Muscle contraction is caused by (This is a multiple choice question choose the answer from the…
A: Sarcomere is the functional unit of contraction. The distance between two Z lines is called…
Q: 26- The action potential is carried to the interior of the filament by: A. Sacromere B. Sacrolemma…
A: An action potential happens in physiology whenever the membrane potential of a single cell region…
Q: 5. What would happen if tropomyosin couldn't change confirmation in the presence of Ca2+ binding to…
A: When the muscle cell is stimulated to contract by an action potential, calcium channels open in the…
Q: 1. Which of the following would you find in the synaptic cleft of an alpha motor neuron and a muscle…
A: A neuromuscular junction is a chemical synapse formed by the contact between a motor neuron and a…
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Q: n the Golgi tendon reflex we see ______________ of the muscle and in the stretch reflex we see…
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Q: When a nerve impulse reaches the nerve endings the permeability of the A. Presynaptic membrane to…
A: when a nerve impulse or action potential reaches the nerve endings the permeability of the…
Q: Explain what how the muscle cell maintains resting membrane potential and explain the two main parts…
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Q: 2. Which of the following is not one of the basic functions of the nervous system? a. Formulate…
A: NOT A BASIC FUNCTION: ANS : option ~ [C]
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- 6.Describe a synapse and a neuromuscular junction.25. The influx of calcium into the axon terminal of a chemical synapse is responsible for A. initiation of an action potential B. termination of an action potential C. fusion of vesicles to the membrane and exocytosis of neurotransmitters D. diffusion of the neurotransmitter across the membrane and into the cleft E. fusion of vesicles to the membrane and exocytosis of calcium F. movement of calcium through gap junctions1. What could you correctly say about the Bundle of His? a. Changes in its rhythm of firing would be classified as dromotropic effects b. Cells within it rely on calcium-induced calcium release c. Cells within it would participate in inotropic effects d. Cells within it make force 2. Which of the following is/are true regarding all of the action potentials that we have learned about in class thus far? (Hint - the 3 types are neuronal, ventricular, nodal) a. They all have the fast inward sodium current that is responsible for initial depolarization b. They all carry a calcium current c. They all last over 100ms d. They all have a repolarizing potassium current e. All answers are true
- Botulism is a disease that was associated to eating out of cans that had been contaminated by a deadly bacteria. It is an anaerobic bacteria (does not need oxygen to survive). What botulism does is It floods hte area with sodium O prevents the sarcoplasmic reticulum from releasing Calcium O prevent the release of the neurotransmitter acetylcholine prevent the release of the neurotransmitter dopamineWhich of the following statements are true with regards to the differences between a neuromuscular junction, and a standard central nervous system (CNS) synapse? Select all that apply. O The neuromuscular junction is a synapse between a neuron (alpha motor neuron) and a muscle fibre. CNS synapses connect two neurons. The graded potential generated by a neuromuscular junction has a much larger voltage than that of a CNS synapse. The structure of the neuromuscular junction ensures that an action potential in the alpha motor neuron always results in an action potential in the post-synaptic muscle fibre. CNS synapses do not guarantee this. The neuromuscular junction always uses Acetylcholine as a neurotransmitter, whereas CNS synapses may use a variety of neurotransmitters depending on their location and function1. Action potential down a neuron: For each step of an action potential, provide a brief summary of events, the particular membrane potential voltage number it should be, and which ion is moving in which direction. A ' B C D E
- The purpose of gap junction is Question options: to provide intercellular communication allow small ions and electrical impulses to pass between cells A and B A only1. How do we know that there are vesicles filled with neuromuscular junction? Why neurotransmitters at the are they termed 'quanta'?When an action potential arrives at the neuromuscular junction, acetylcholine is released into the synaptic cleft and binds to receptors in the postsynaptic membrane. Which of the following represents the correct order of the next series of events? A. An action potential travels down the T tubules, depolarization spreads through the T tubules, Ca2+ is released from the sarcoplasmic reticulum, and myosin binds to actin. B. Ca2+ is released from the sarcoplasmic reticulum, an action potential travels down the T tubules, depolarization spreads through the T tubules, and myosin binds to actin. C. An action potential travels down the T tubules, depolarization spreads through the T tubules, Ca2+ is taken up by the sarcoplasmic reticulum, and myosin binds to actin. D. T tubules are depolarized, Ca2+ is released from the sarcoplasmic reticulum, an action potential is created in the muscle cell, and myosin bonds to actin. E. An action potential travels…
- 1. synaptic vesicles are synthesized in the nerve cell body - TRUE OR FALSE 2.in an electrical synapse membrane depolarization is transmitted from the presynaptic cell to post synaptic cell through gap junctions - true or falseACh receptors are found in:- a. synaptic vesicles. b. terminal cisternae. c. thick filaments. d. thin filaments. e. junctional foldshen an action potential arrives at the nerve terminal of a neuromuscular junction, which of the following statements best describes the events that occur? Depolarisation of the nerve terminal causes the release of ACh which activates nicotinic receptors on the skeletal muscle membrane to cause Ca2+ entry and muscle contraction. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores causing the release of ACh which activates voltage-gated Na+ channels at the end-plate. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores causing the release of ACh which binds to muscarinic receptors at the end plate. Depolarisation of the nerve terminal opens voltage-gated Ca2+ channels, Ca2+ entry brings vesicles containing ACh to the membrane which form fusion pores…
