1. Synaptic vesicles store calcium 2. Long bone grows in length as a result of endochondral deposition of bone tissue 3. Smooth and cardiac muscle are innervated by the autonomic nervous system, whereas skeletal muscle is innervated by the somatic nervous system 4. As skeletal muscle shortens with contraction, the length of the I band remains constant as the length of the A band decreases 5. Excitation-contraction coupling is the sequence of events that links the action potential to changes in skeletal muscle force development 6. During the cross-bridge cycle, ATP binding to myosin causes the myosin head to detach from actin 7. Myoglobin makes some muscle fibers to appear red 8. When CI influx into the axoplasm through chloride channel, hyperpolarization could occur 9. Both sympathetic and parasympathetic nervous systems are located in the autonomic nervous system 10. Calcitonin is a protein homone that is produced by the parafollicular cells (C-cells) of the thyroid gland, and regulates levels of calcium and phosphate in the blood, opposing the action of parathyroid hormone 11. Freezing microtome (cryostat) is used for sectioning paraffin-embedded tissues for light microscopy

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: You discover a mutant mouse whose skeletal muscles do not work properly.  You remove a piece of…

A: Acetylcholinesterase or acetylhydrolase is a cholinesterase enzyme primarily found at neuromuscular…

Q: 1. A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. II.…

A: The spinal cord is the place where motor neurons are located. It is the site of interneurons and…

Q: Given these events:(1) Acetylcholine is broken down into acetic acid and choline.(2) Acetylcholine…

A: Neurotransmitters are chemicals secreted by neurons that carry information from one neuron to the…

Q: Unlike skeletal muscle cells, cardiac muscle cells________."   A do not use the sliding filament…

A: Muscle is a soft tissue present in various animals.Muscle cells are composed of protein filaments of…

Q: In a classic experiment, the strength of a neural stimulus and the resulting muscle contraction are…

A: Neurons are the basic building blocks of the nervous system.

Q: Neurons supplying smooth muscle secrete histamine display receptors only on the dendrites create…

A: Smooth muscle are cells that do not have striations. These muscles are present in the walls of…

Q: Satellite cells *         A- are muscle stem cells       B- are located between the plasma membrane…

A: Myosatellite cells, otherwise called satellite cells or muscle stem cells, are little multipotent…

Q: the given below option what step causes a sarcomere to shorten? cross-bridge formation  calcium…

A: The component of a muscle fiber that contracts is called a sarcomere. Actin and myosin make up the…

Q: Which of the following is NOT associated with cardiac muscle contraction?   Contraction requires…

A: Cardiac muscle is one of the three types of vertebrate muscles. It is an involuntary, striated…

Q: When the neurotransmitter acetylcholine (ACh) binds the acetylcholine receptor (a GPCR) on muscle…

A: Neurotransmitters can cause a variety of responses on different tissues or organs. The receptors…

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: Put these events in the correct chronological sequence: 1. End-plate potentials trigger action…

A: The contraction of the muscle is led by two conditions which include an increase in the muscle…

Q: Curare is a dangerous poison extract from plants that can block the binding site of Acetylcholine…

A: The conditions which likely to diminish or completely prevent tension production are 1. Reduced…

Q: Songbirds sing using a type of muscle fiber called super fast-twitch muscles. These super…

A: Muscle contraction and relaxation are regulated by the levels of calcium ions in the sarcoplasm…

Q: In the stretch reflex,a. Golgi tendon organs activate contraction in extrafusal muscle…

A: A stretch reflex occurs when muscles are stretched, and the receptors send action potentials up the…

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: Myosin motor proteins are NOT involved in which of the following?

A: option a not involved Regulating the mitotic organizing center MTOCs  Option b involved because…

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: 1. During skeletal muscle contraction, what event directly precedes the release of actin by myosin?…

A: It is required to mention the event that directly precedes the release of actin by myosin during the…

Q: How are motor neurons involved in muscle contractions? Select all that apply. The release of calcium…

A: It is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord and…

Q: Order the following events of excitation and excitationcontraction coupling. Put 1 by the first…

A: A motor neuron is responsible for the transmission of a stimulus to the muscle tissues. A motor unit…

Q: 6 As calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the…

A: Excitation–contraction coupling: It is a physiological process which involves the conversion of an…

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: Describe in detail the events at the neuromuscular junction and how these events allow for the…

A: The neuromuscular junction is a synaptic connection between the terminal end of a motor nerve and a…

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: Suppose a drug blocks entry of calcium from the extracellular fluid. What if, anything, would happen…

A: Muscle cells are specialized cells that use contractile motion for movement either voluntary or…

Q: Myosin binds to actin, then bends. What is ATP needed for next? A. to pump the Ca++ “keys” back into…

A: D option is the correct statement.

Q: 8. How would the increased stimulus intensity lead to more muscle activity (i.e., increased force)?…

A: Introduction :- The neuromuscular junction (NMJ) is a kind of synaptic connection which is formed…

Q: Identify the manipulated, responding and controlled variables in the experiment described above.

A: In the given experiment, the strength of a neural stimulus and the resulting muscle contraction are…

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: Acetylcholinesterase is an important molecule in the engine end plate to share: a) stimulates…

A: Introduction:  Acetylcholinesterase is primary cholinesterase in body. It is also known as AChE or…

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: Skeletal, smooth, and cardiac muscle are similar in that they all _____.   A are divided into motor…

A: SKELETAL MUSCLES SMOOTH MUSCLES CARDIAC MUSCLES They are striated muscles. They are non-striated…

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: In which type(s) of muscle cells does each cell have its own neuromuscular junction?…

A: As per the guidelines, first is answered. Cells called muscle fibres are composed of skeletal muscle…

Q: 51- are links between the Filamentous F-actin of thin filaments and myosin heads of thick filaments.…

A: Introduction Muscle contraction is the activation of tension-generating sites within muscle cells,…

Q: 18. The binding of calcium to troponin will directly cause A. the hydrolysis of ATP B. the binding…

A: Troponins are a group of proteins that are found in the skeletal and muscle fibres of the heart. It…

Q: 1. A receptor absorbs the energy of a stimulh by means of a. Reception b. Transmission c.…

A: Physiology is defined as the study of the way the human body works. It tells the basic and complex…

Q: Synaptic vesicles store calcium Long bone grows in length as a result of endochondral deposition of…

A: Hello! Since you have posted multiple questions, we are answering the first part only. Kindly…

Q: Match the ATP duty of myosin to its description…

A: Introduction  ATP Is Essential For Muscle Contractions Because It Frees The Myosin For The Next…

Q: When a muscle fiber is stretched from 60% of its optimal length to Lo, what change or changes are…

A: INTRODUCTION When a muscle is stretched, some of its fibers lengthen, but other fibers may remain at…

Q: When an action potential arrives at the neuromuscular junction, acetylcholine is released into the…

A: Muscle is the tissue present in the body that helps for movement and change shape. There are mainly…

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…

Q: What would happen to muscle function if you ingested a toxin that completely inactivated troponin?…

A: The three types of muscle present in the body are skeletal muscle, smooth muscle and Cardiac muscle.…

Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.