This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What electrolyte inactivates troponin and allows actin and myosin to form a bridge enabling the ... (Read 75 times)

jCorn1234

  • Hero Member
  • *****
  • Posts: 545
on: Jul 23, 2018
What electrolyte inactivates troponin and allows actin and myosin to form a bridge enabling the muscle fibers to contract?
 
  A) Magnesium
  B) Calcium
  C) Potassium
  D) Sodium

Question 2

The nurse is discussing the endocrine system with a class of nursing students. What substance would the nurse label as a hormone?
 
  A) Acetylcholine
  B) Norepinephrine
  C) Nucleic acid
  D) Serotonin


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

trog

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 23, 2018
Answer to Question 1

B
Feedback:
Calcium must be present to deactivate troponin so that actin and myosin can react to form actinomycin bridges. Potassium, sodium, and magnesium do not affect troponin.

Answer to Question 2

B
Feedback:
A hormone is secreted directly into the bloodstream and travels from the site of production to react with specific receptor sites to cause an action. Norepinephrine, which is a neurotransmitter, is a hormone when it is produced in the adrenal medulla, secreted into circulation, and travels to norepinephrine receptor sites to cause an effect. Acetylcholine and serotonin are neurotransmitters, but are not hormones. Nucleic acid is used to build deoxyribonucleic acid and ribonucleic acid.


jCorn1234

  • Member
  • Posts: 545
Reply 2 on: Jul 23, 2018
Thanks for the timely response, appreciate it

dyrone

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Seasonal changes in biomass and growth form of benthic algae in the Eel River, California: (a) in ea Seasonal changes in biomass and growth form of benthic algae in the Eel River, California: (a) in ea
CMS-1500 (02/12) claim form. CMS-1500 (02/12) claim form.
Streptococci: Individual bacteria that have a rounded shape and have clumped together to form a ... Streptococci: Individual bacteria that have a rounded shape and have clumped together to form a ...
How to fully analyze the standard and factored form of a quadratic equation (Question 1) How to fully analyze the standard and factored form of a quadratic equation (Question 1)
Where and how sperm form. Where and how sperm form.
Video: Nucleic acid digestion -small intestine

For a complete list of videos, visit our video library