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

Author Question: Muscles that guard entrances and exits of internal passageways are ________ muscles. A) parallel B) ... (Read 89 times)

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
on: Feb 28, 2019
Muscles that guard entrances and exits of internal passageways are ________ muscles.
 A) parallel
  B) convergent
  C) pennate
  D) bipennate
  E) circular

Question 2

Many visceral smooth muscle cells lack motor neuron innervation. How are their contractions coordinated and controlled?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jaymee143

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Feb 28, 2019
Answer to Question 1

E

Answer to Question 2

Gap junctions interconnect visceral smooth muscle fibers. An action potential that begins in one will spread to its surrounding neighbors. The action potential can be triggered by stretching, hormones, chemical changes, or stimulation at a myoneural junction on a distant smooth muscle cell.


eruditmonkey@yahoo.com

  • Member
  • Posts: 546
Reply 2 on: Feb 28, 2019
Excellent

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Muscles of the buttocks, leg, and foot. Muscles of the buttocks, leg, and foot.
Shingles effleurage with hands parallel to the spine and to the direction of movement. Shingles effleurage with hands parallel to the spine and to the direction of movement.
Apply circular friction to muscles on the head using moderate pressure to the frontalis and ... Apply circular friction to muscles on the head using moderate pressure to the frontalis and ...
Apply kneading and deep stroking to lower arm muscles. (A) Knead muscle bellies. (B) Thumb press ... Apply kneading and deep stroking to lower arm muscles. (A) Knead muscle bellies. (B) Thumb press ...
How are Muscles Formed? How are Muscles Formed?
bird internal bird internal
Video: Cardiac Cycle (Part 4 of 4)

For a complete list of videos, visit our video library