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What is the function of CCK? Select all that apply.

Select one or more:
A. Causes the secretion of enzyme-rich pancreatic juices
B. Stimulates the gallbladder to release bile
C. Stimulates the liver to secrete bile
D. Stimulates the stomach to release the enzyme gastrin
E. Stimulates the release of bicarbonate-rich pancreatic juices

Which of the following is TRUE of cardiac muscles? Select one:

A. They use chemical junctions between cells
B. They require the autonomic nervous system for contraction
C. They can only contract when sufficiently stimulated at the neuromuscular junction
D. They can contract in the absence of the nervous system

Answer :

Final answer:

The function of CCK includes causing the secretion of enzyme-rich pancreatic juices, stimulating the gallbladder to release bile, stimulating the release of bicarbonate-rich pancreatic juices, and stimulating the stomach to release the enzyme gastrin. Cardiac muscles use chemical junctions between cells and can contract in the absence of the nervous system.

Explanation:

Function of CCK:

  • CCK, or cholecystokinin, is a hormone produced by the small intestine in response to the presence of fats and proteins.
  • Its main function is to stimulate the release of digestive enzymes from the pancreas and bile from the gallbladder.
  • CCK acts on various organs to promote digestion and absorption of nutrients.
  • Specifically, CCK causes the secretion of enzyme-rich pancreatic juices, stimulates the gallbladder to release bile, stimulates the release of bicarbonate-rich pancreatic juices, and stimulates the stomach to release the enzyme gastrin.

Characteristics of cardiac muscles:

  • Cardiac muscles are a type of muscle tissue found in the heart.
  • They have unique characteristics that allow the heart to function as a pump and maintain circulation.
  • Cardiac muscles are interconnected through specialized junctions called intercalated discs, which allow for coordinated contraction.
  • Unlike skeletal muscles, cardiac muscles use chemical junctions between cells to transmit electrical signals and coordinate contraction.
  • Cardiac muscles are also capable of generating their own electrical impulses, allowing them to contract rhythmically without the need for external stimulation.
  • Therefore, the true statement about cardiac muscles is that they use chemical junctions between cells and can contract in the absence of the nervous system.

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