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 54 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
Great answer, keep it coming :)

lcapri7

  • Member
  • Posts: 350
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Bridge in Japan Bridge in Japan
A depiction of the amount of precipitin that would form with different ratios of antigen and ... A depiction of the amount of precipitin that would form with different ratios of antigen and ...
How to sketch a quadratic equation that is in standard form (Question 1) How to sketch a quadratic equation that is in standard form (Question 1)
Days 18–23 Bumps of mesoderm (somites) form. They will develop into the dermis and most of the ... Days 18–23 Bumps of mesoderm (somites) form. They will develop into the dermis and most of the ...
Where and how sperm form. Where and how sperm form.
Video: Role of the urinary system - acidosis and alkalosis

For a complete list of videos, visit our video library