Do all three types of muscle: smooth, skeletal, and cardiac use cross bridges for movement of muscles? What about tropinoin and tropomysin? Is it only skeletal and cardiac that utilize these specific myosin and actin components?
Q: 7 A-C
A: The T4 bacteriophage is a distinct virus affecting Escherichia coli (E. coli) bacteria. It belongs…
Q: Epigenetic phenomena involve ODNA methylation and histone acetylation O genetic mutation chromosomal…
A: Epigenetic phenomena refer to heritable changes in gene expression that do not involve alterations…
Q: B. The Disk Diffusion Assay and Antibiotic Activity Plate Culture Pseudomonas fluorescens…
A: Disk diffusion Assay is an assay which is used in laboratories to determine the susceptibility of…
Q: during mouth to mouth resuscitation, air is forced into the victims trachea. Exhaled air contains a…
A: Mouth-to-mouth resuscitation, commonly known as rescue breathing or cardiopulmonary resuscitation…
Q: n IV, with an IV set calibrated at 15 gtts/mL, is administered at 25 gtts/min. If the IV bag volume…
A: Given informationIV bag volume= 1000mLCalibration of IV set= 15 gtts/mLAdministered at = 25…
Q: how do estuarine shrimp (WHITE SHRIMP, PENAEUS INDICUS) ADAPT TO MORPHOLOGICAL ADAPTION IN ESTUARIES…
A: While Cape Stumpnose (Rhadodosangus holubi) have developed behavioural adaptations related to…
Q: How does our current scientific understanding envision soil organic matter (SOM)? - SOM…
A: SOM stands for Soil Organic Matter. It refers to the organic component of soil, which includes a…
Q: what are the biological effects of ionising radiation
A: Ionizing radiations are the radiations which carries higher energy and these radiations are able to…
Q: While it is theorized that there might be upwards of one billion bacterial species, about how many…
A: Bacteria are prokaryotic microorganisms with no double membrane cell organelles. They have circular…
Q: ras arrives. Q6.8. Imagine that after the birds have been living in the city for many years a second…
A: Carrying capacity:The environment contains limited resources and hence can only sustain a limited…
Q: If the physician refuses to tell the patient he has cancer, this would be an example of what? A.…
A: Doctors have the privilege of not informing the patient about their condition; if this information…
Q: A) What is resident flora? B) How might resident flora prevent infection AND cause infection? 150…
A: Resident flora:The human body has multiple microorganisms that live in different parts of the body…
Q: Draw and label an rRNA (ribosome). Make sure to describe any special features/parts. Draw and label…
A: Ribosomes are the major units of the cell that is required for the protein synthesis mechanism. The…
Q: Activation of which 3 proteins would inhibit mTOR? a. AMPK b. TSC c. PKA d. PTEN e. Akt
A: The mTOR (mammalian target of rapamycin) pathway is a crucial signaling pathway involved in…
Q: If interkinesis occurs, it happens before which phase?
A: Interkinesis is a brief period that occurs between the two divisions of meiosis, specifically…
Q: When the conditions are favorable for a population at low density, such as when a species colonizes…
A: Exponential population growth occurs when the birth rate of individuals within the population…
Q: Please help me with the genomics/developmental biology question below: Matching A. Proto-oncogenes…
A: The cell cycle is a highly regulated process with different checkpoint ensuring correct events has…
Q: You want to compare 5 formulations of RootsTM fertilizer on the growth of seedling pines growing in…
A: In this experiment, we compare the impact of several RootsTM fertilizer formulations on the…
Q: In the pedigree below what type of disease trait expression pattern is being observed? a…
A: Pedigree is a family chart showing the inheritance of a particular trait through several…
Q: U Question 67 Which of the following membrane bound organelles are found inside bacterial cells? O…
A: Prokaryotes are a group of organisms that lack a nucleus and other membrane-bound organelles. They…
Q: 8. Clonal Selection Hypothesis is the most accepted theory for how immune cells respond to specific…
A: Immune cells, also known as immune system cells or leukocytes, are specialized cells that play a…
Q: Conventional ligation procedures make use of enzymes with which activity?
A: DNA repair is a cellular mechanism that corrects various types of DNA damage that can occur due to…
Q: List five reasons for an increase in numbers of emerging infectious diseases
A: Developing infectious illnesses have become more predominant recently around the world. These…
Q: Number of individuals surviving 1000 500 100 50 10 0 Type I Type II Type IV 2 Type III (d) 4 (c) 6 8…
A: Survivorship curve is a graphical illustration which indicate number of survivors that survive at…
Q: What are the different Pre-zygotic and Post-Zygotic Reproductive Barriers?
A: Acvording to our guideline we can answer only the first question with three subparts. You hava…
Q: The major organizing center of the gastrulating embryo is the A. Inner cell mass B. Primitive streak…
A: Note:- Sticking to our guidelines I have answered only ist three questions. Please ask rest of the…
Q: In the Avery, McLeod, McCarty Experiment where supernatant from heat killed, virulent S Strain…
A: Avery, McLeod and McCarty experiment was used to determine the genetic material and its nature on an…
Q: Domain Eukarya ___________________means their cells have nuclei and other compartments…
A: Domain Eukarya refers to a taxonomic domain that includes all organisms with cells that have a…
Q: 1. Fill in the blanks below using the following terms: antibiotic resistant, nonresistant, and…
A: In the world of medicine, antibiotic resistance is an increasing global concern. It speaks about…
Q: Place the steps involving organelles for milk production in the correct order from start to finish.…
A: Mammals ability to produce milk is an essential biological activity that is essential to their life…
Q: A dietitian is providing diet counseling for a patient with hyperlipidemia. She asks the patient to…
A: A SOAP note is a method of documentation for healthcare providers that consists of four sections:…
Q: A) Draw a FtsZ mutant cell. B) Draw a MinD mutant cell. C) Draw a MinE mutant cell.
A: An organism's genetic makeup can alter through the process of mutation. It involves changes to the…
Q: For cancer to occur in an individual which of the following must occur? a an accumulation of…
A: Cancer, a formidable adversary to human health, continues to challenge the medical community with…
Q: The figure shows that many male powerlifters had testosterone levels below the 10 nmol/L threshold,…
A: The relationship between testosterone levels and performance in powerlifting is a subject of…
Q: As Binah (she/her) was leaving the gym, she was red-faced. She commented that she seems to always…
A: Sweat is produced by the Sweat glands present all over the skin. Production of sweat is a way to…
Q: What do you think about the possibility that NAD treatment could ease the signs of a hangover?…
A: NAD (nicotinamide adenine dinucleotide) is a coenzyme found in all living cells that plays a crucial…
Q: Somatic cells of the red fox, Vulpes vulpes, normally have 38 chromosomes. What is the number of…
A: Usually two types of cells are present in an organism that are- somatic cells and gametic cells (or…
Q: homeostasis
A: It is defined as the state of balance among all the body systems needed for the body to survive and…
Q: A. Demonstration of Antibiosis Plate Culture Pseudomonas fluorescens Micrococcus luteus Escherichia…
A: Zone of inhibition is the clear circular area that is around an antimicrobial disc. The reason of…
Q: In Florida it is particulary important to apply sunscreen when going outside, especially when…
A: When our skin is exposed to UV radiation from the sun, our body responds by increasing the activity…
Q: signal transduction pathway for auxin
A: This pathway refers to a series of molecular events which transmit a signal from the extracellular…
Q: conduct a flow chart, summarising the pathway of an ovum from the female ovary to the uterus,…
A: After reaching the uterus the blastocyst (a hollow ball of cells formed from the zygote) undergoes…
Q: Phylum Arthopoda order Hymneoptera (Bee) Apis Apis Diptera (Hoverfly) Lepidoptera (Butterfly) genus…
A: In Ecology, the following terms are defined below:Species Richness which shows how many numbers of…
Q: What do you think might occur if we do not shift our nutritional consumption to best support the…
A: Our body is mainly composed of six basic elements which are oxygen,…
Q: Which of the following is a density-independent factor on population growth? weather event food…
A: A density-independent factor on population growth is a factor that affects population size…
Q: Which of the following cells is not phagocytic? Monocyte Dendritic cells Macrophage Chondrocyte
A: Phagocytic cells are a type of white blood cell that use phagocytosis to engulf bacteria, foreign…
Q: n
A: A mechanism for regulating gene expression in bacteria is lactose induction. It includes turning on…
Q: As you have read in this week's Readings and Resources, what you do directly before bed affects the…
A: The importance of good quality sleep cannot be overstated. It plays a crucial role in maintaining…
Q: Part A : What is a plausible explanation for why hematocrit returns to normal within weeks after…
A: Cancer is a complex and diverse group of diseases characterised by uncontrolled cell growth and…
Q: The enzyme chymosin secreted in calf stomachs has traditionally been used to coagulate milk to make…
A: Title: Sustainable Cheese Production: Bioreactor-Based Chymosin Production as an Ethical…
Do all three types of muscle: smooth, skeletal, and cardiac use cross bridges for movement of muscles? What about tropinoin and tropomysin? Is it only skeletal and cardiac that utilize these specific myosin and actin components?
Step by step
Solved in 3 steps
- What are the mechanisms for muscle contraction vs. relaxation in regards to myosin/thick filaments/thin filament movement? Is it true that if tropomysin blocks myosin sites, contraction ends and muscle relaxes?In a skeletal muscle if calcium levels in the cytosol increase, as calcium is released from the sarcoplasmic reticulum (SR,) how would this affect the position of the actin and myosin filaments? Group of answer choices Calcium released from the SR binds to calmodulin. Calmodulin activates myosin light chain kinase, causing cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and allowing for cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and inhibiting cross bridge formation. Calcium released from the SR binds to troponin, causing actin to detach from myosin. pick one answerCalmodulin is found in smooth muscle cells and performs a similar function to troponin in striated muscle fibers. However, calmodulin not only gets activated by Ca2+ but also slows the release of Ca2+ from the sarcoplasmic reticulum. How might this difference relate to the different kinds of contractions smooth muscles do in comparison to striated muscles?
- In an isometric contraction, how can the muscle stay the same length when the muscle is contracting? Can choose more than one - The muscle is not able to generate more (or the same amount) force than the load, preventing shortening of the muscle. - Calcium stops entering the sarcoplasm when the desired length is reached. - Elastic elements of the muscle stretch in response to the contraction of the muscle, so that the muscle stays the same size despite shortening sarcomeres. - The myosin heads detach from actin when they reach the desired length.Describe the structures listed below: (Fig 12.3, 12.4) Muscle fiber: a muscle cell; Myofibril Thick filaments Thin filaments Sarcoplasmic reticulum (SR) Transverse tubules (T-tubules)Distinguish between skeletal, smooth, and cardiac muscle in terms of location and whether they have sarcomeres. Use the sliding filament model to draw how thin filaments, thick filaments, and Z lines move during muscle contraction. Predict how perturbations of acetylcholine release, reception, or breakdown will influence muscle contraction. Predict how perturbations of actin, troponin, tropomyosin, myosin, or calcium would influence muscle contraction. Distinguish between the sympathetic and parasympathetic nervous system. Predict how changes in stress levels or situations would affect activation of the sympathetic and parasympathetic nervous system, levels of epinephrine and norepinephrine, and blood pressure.
- Skeletal muscle is described as striated. What are the lighter, thinner stripes noted under the microscope? Group of answer choices troponin actin myosin dystrophin Rather than innervating individual muscle fibers, motor neurons often innervate two or more muscle fibers. The motor neuron and the muscle fibers it innervates are together called a: Group of answer choices motor unit myofibril muscle fascicle motor fascia Fast glycolytic muscle fibers allow for relatively quick ATP energy production by splitting glucose (but eventually leads to fatigue), a process described as: Group of answer choices fermentation aerobic pathway anaerobic pathway ATP reserve useWhy does muscle fatigue occur? since sarcomeres within skeletal muscles are rigidly aligned with each other what do you think excessive stretch or compression (remember the basic structure of the sarcomere with overlapping thin and thick filaments and the length-tension relationship) will do to the force generation of a muscle contraction?What are the events that occur during contraction of a muscle fiber? Binding of ACh to ACh receptors Influx of sodium Excitation of the muscle fiber Formation of cross-bridges ADP release from myosin head Power stroke ATP binding to myosin head Thin filament sliding laterally
- Which of the following step(s) about the excitation of skeletal muscle is/are incorrect? 1. Acetylcholine is released and binds to motor end plate receptors 2. An action potential is created and moves down T-tubules 3. Calcium is released from the sarcoplasmic reticulum 4. Calcium ions bind to tropomyosin to shift troponin off the binding sites for cross-bridging 5. Myosin forms cross-bridges and binds with actin to pull it towards middle of sarcomereWhat happens to contraction of a muscle cell if some of the Ca2+ that was released during a contraction is still in the cytoplasm (sarcoplasm) when the next stimulus arrives? - The muscle contracts with the same tension generated as during the first contraction, because the number of cross-bridges formed is always the same during a contraction. - The muscle contracts with greater tension generated because more troponin molecules bound means greater myosin-binding sites (active sites) are revealed on the actin, leading to a larger number of cross-bridges formed. - The muscle contracts with greater tension generated because there will be more Ca2+ in the sarcoplasm after the second stimulation, which will bind to more troponin molecules. - The muscle contracts with the same tension generated as during the first contraction, because muscles contract in an all-or-none fashion.What is the function of calcium in muscle contractions? to bind to troponin and change its interaction with tropomyosin to alter membrane potential causing a depolarization to bind to myosin and allow it to attach to tropomyosin to release ADP from myosin