You are given a novel drug that inhibits the activity of a GPCR kinase (GRK) specific for GPCR's that bind adrenaline (epinephrine). You know that adrenaline increases heart rate and activates adenylyl cyclase leading to breakdown of glycogen in muscle. You inject two rats. Rat #1 is given an injection of the novel drug followed by adrenaline, while rat #2 is injected with adrenaline only. Which of the following would you find when you analyze the rats 5 min after injection of adrenaline? Rat # 1 has increased glycogen and increased cAMP in muscle, and increased heart rate relative to Rat #2 O Rat # 1 has decreased glycogen and increased cAMP in muscle, and increased heart rate relative to Rat #2 O Rat # 1 has decreased glycogen and increased cAMP in muscle, and decreased heart rate relative to Rat #2 Rat # 1 has decreased glycogen and decreased cAMP in muscle, and decreased heart rate relative to Rat #2 O No difference in levels of glycogen and cAMP in muscle, and heart rate in rat #1 compared to rat #2

Answers

Answer 1

Rat # 1 has decreased glycogen and increased cAMP in muscle, and increased heart rate relative to Rat #2.

What is adrenaline?

Adrenaline is a hormone that increases heart rate and activates adenylyl cyclase resulting in the breakdown of glycogen in muscle. G protein-coupled receptor kinases (GRKs) phosphorylate and inactivate activated G protein-coupled receptors (GPCRs).

GPCR kinase inhibitors have been identified and designed to selectively inhibit GRKs that regulate specific GPCRs. It has been discovered that GRK2 inhibition could be used to treat heart failure because it improved cardiac contractile function and reduced mortality. The drug used in the experiment inhibits the GPCR kinase (GRK) specific for GPCR's that bind adrenaline (epinephrine).

The inhibition of GRK prevents the deactivation of the receptor and thus increases the signal sent downstream. Rat #1 is given an injection of the novel drug followed by adrenaline, while rat #2 is injected with adrenaline only. In rat #1, the novel drug inhibits the activity of the GRK. As a result, adrenaline signaling will be amplified in the animal, which results in a decrease in glycogen levels. The rate of glycogenolysis is increased in rat #1 due to the inhibition of the GRK, this increases cAMP.

The increase in cAMP levels in rat #1 is due to the inhibition of the GRK. The increase in cAMP levels will increase the heart rate in rat #1 relative to rat #2.In rat #2, cAMP and glycogen levels increase after adrenaline is administered, and the heart rate increases as well. However, the increase in the rate of glycogenolysis and cAMP production will be less in rat #2 than in rat #1, resulting in a lower heart rate relative to rat #1.

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Related Questions

On hand is 17.5mg/6ml of heparin. The physician orders 35mg how many mL with the MA administer

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The medical assistant should administer 12 ml of the heparin solution to deliver 35 mg of heparin.

To administer 35mg of heparin using the concentration of 17.5mg/6ml, we can use a simple proportion:

17.5mg/6ml = 35mg/x ml

Cross-multiplying, we get:

17.5mg * x ml = 35mg * 6ml

Simplifying, we get:

x ml = (35mg * 6ml) / 17.5mg

x ml = 12ml (rounded to the nearest tenth)

Therefore, the medical assistant should administer 12ml of the heparin solution to deliver 35mg of heparin.

What is heparin solution?

Heparin solution is a medication used to prevent and treat blood clots. It works by blocking the formation of blood clots and by preventing existing blood clots from growing larger. Heparin solution is usually administered by injection into a vein or under the skin. It is often used in hospital settings, such as during surgery or in patients who are immobilized for extended periods of time, to reduce the risk of blood clots forming. Heparin solution comes in various concentrations and is available by prescription only.

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which action should the nurse associate with outcome identification and planning in the nursing process?

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The nurse should associate the following action with outcome identification and planning in the nursing process: establishing client-centered goals and expected outcomes.

The nursing process is a methodical and cyclic approach to providing nursing care. The nursing process is built on the foundation of a patient-centered philosophy that emphasizes the importance of the individual and their medical needs. It involves a series of interrelated stages that are followed in order and in a systematic manner.

The five stages of the nursing process include assessment, diagnosis, outcome identification and planning, implementation, and evaluation.

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if speakers send nonverbal signals that contradict their verbal message, listeners will typically accept the nonverbal behavior as the true message.

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It is true that nonverbal signals can sometimes contradict the verbal message being conveyed by a speaker.

What is nonverbal message?

In some cases, listeners may be more likely to rely on nonverbal behavior if they perceive the speaker to be more credible or trustworthy based on their nonverbal cues. However, in other cases, listeners may be more likely to trust the verbal message if they perceive the speaker to be more knowledgeable or authoritative.

Overall, it is important to consider both verbal and nonverbal communication when trying to understand someone's message, as they both play an important role in conveying meaning.

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Which of the following statements related to critical or semi-critical, or non-critical patient-care items is correct?A. Heat tolerant critical and semi-critical items must be sterilized by steam, unsaturated chemical vapor, or dry heat.B. Heat-sensitive critical items can be sterilized by ethylene oxide or by immersing them in liquid chemical germicides registered by the FDA as chemical sterilants.C. Non-critical items, when visibly soiled, must be disinfected with an EPA-registered hospital level intermediate-level disinfectant.D. All of the above are correct.

Answers

The correct statement among the following statements related to critical, or semi-critical, or non-critical patient-care items is: (A) heat tolerant critical and semi-critical items must be sterilized by steam, unsaturated chemical vapor, or dry heat.

Sterilization is a method used to destroy and remove all microbial life including highly resistant bacterial endospores. It is used in hospitals and other medical facilities to avoid the spread of dangerous diseases and infections. Among the given options, the correct statement related to critical or semi-critical, or non-critical patient-care items is that (A) heat-tolerant critical and semi-critical items must be sterilized by steam, unsaturated chemical vapor, or dry heat.

Option B is incorrect because heat-sensitive critical items cannot be sterilized by ethylene oxide or by immersing them in liquid chemical germicides registered by the FDA as chemical sterilants. They are sterilized by low-temperature hydrogen peroxide gas plasma, vaporized hydrogen peroxide, or ozone.

Option C is also incorrect because non-critical items, when visibly soiled, must be disinfected with an EPA-registered hospital-level low-level disinfectant but not an intermediate-level disinfectant. Disinfection is the process of killing harmful microorganisms using chemicals or physical agents.

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please select the two correct answers to test your understanding of the primary goals of antimicrobial treatment.

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Two correct responses to test your comprehension of antimicrobial treatment's primary objectives. 1. to eradicate the infectious agent and 2. to be nontoxic to the host and produce no side results.

Therefore, the elimination of bacteria at the site of infection is the objective of antimicrobial therapy. Within the limitations of the design of clinical trials that are currently recommended, bacterial eradication is not typically evaluated as a primary endpoint.

Antimicrobial agents must possess three essential characteristics in order to maximize their therapeutic potential in critically ill patients: in vivo and in vitro efficacy, low toxicity, and reasonable cost.

Antimicrobials can be bactericidal or bacteriostatic, which stops the target bacterium or fungus from growing. Although bacteriostatic agents enable the host's normal defenses to destroy the microorganisms, bactericidal agents can be extremely beneficial.

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Q- Select the two correct answers to test your understanding of the primary goals of antimicrobial treatment.

-To destroy the infective agent

-To kill malignant cells

-To be nontoxic to the host and produce no side effects

-To identify the cause of the infection

-To alter the normal microbiota of the patient

the muscle name literally meaning below the tongue is blank.target 1 of 5 the muscle connecting the hyoid bone to the styloid process of the temporal bone is the blank.target 2 of 5 the shorter of the muscles over the fibula is the blank.target 3 of 5 the muscle extending from the arm to the lateral forearm is the blank.target 4 of 5 the hamstring that becomes tendinous midway along its length is the

Answers

The correct options are (1) Hyoglossus: the muscle name meaning below the tongue, (2) Stylo-hyoid, (3) Peroneus Brevis, (4) Brachioradialis, and (5) Semitendinosus.

The muscle name meaning 'below the tongue' is Hyoglossus. It is a thin quadrilateral muscle situated on the side of the neck. It arises from the hyoid bone and consists of three portions; a lateral, an intermediate, and a medial.

The muscle connecting the hyoid bone to the styloid process of the temporal bone is Stylohyoid. It is a slender muscle that arises from the styloid process of the temporal bone of the skull and descends obliquely to reach the hyoid bone.

The shorter of the muscles over the fibula is Peroneus Brevis. It is a muscle located in the lower leg. It runs alongside the fibula, connecting to the ankle and foot bones.

The muscle extending from the arm to the lateral forearm is the Brachioradialis. It is a muscle of the forearm that flexes the forearm at the elbow. It originates in the arm and attaches to the lateral aspect of the forearm.

The hamstring that becomes tendinous midway along its length is the Semitendinosus. It is a long muscle in the thigh that is one of the three hamstring muscles. It is so named because it has a very long tendon of insertion.

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