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 87 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
Excellent

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Several species of squirrels have melanistic phases. In large parts of United States and Canada, the Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
A drug’s bioavailability will depend on the dosage form and how much will actual A drug’s bioavailability will depend on the dosage form and how much will actual
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Dissection of myosin II by proteases Dissection of myosin II by proteases
Bacteria in your GI tract synthesize one form of vitamin K Bacteria in your GI tract synthesize one form of vitamin K
How to visualize division in the Odds form of Bayes's Theorem? How to visualize division in the Odds form of Bayes's Theorem?
Video: Darwin's Observation (Fossils, Galapagos Islands & Africa ) and Natural Selection (Adaptive Traits)

For a complete list of videos, visit our video library