The tracheal rings are C-shaped pieces of ________
A) skeletal muscle
B) bone
C) hyaline cartilage
D) epithelial tissue
C
Explanation:
A) The trachea is kept open by the C-shaped pieces of hyaline cartilage called the tracheal rings.
B) The trachea is kept open by the C-shaped pieces of hyaline cartilage called the tracheal rings.
D) The trachea is kept open by the C-shaped pieces of hyaline cartilage called the tracheal rings.
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Joshua has been complaining about pyrosis after his meals. Which of the following is probably the primary cause of this condition?
A) The bolus of food in the esophagus is too big. B) The lower esophageal sphincter remains open for too long. C) Peristalsis is too slow. D) The cardiac sphincter contracts too often.
The coronary sinus drains the ________ into the ________
A) coronary arteries; left ventricle B) cardiac veins; right atrium C) interventricular artery; left ventricle D) right atrium; right ventricle E) cardiac vein; right ventricle
Identify the pouch-like structure that increases the total filling capacity of the atrium
a) Ventricle b) Coronary sulcus c) Fossa ovalis d) Interatrial septum e) Auricle.
An action potential results from which of the following?
A. The exocytosis of potassium ions B. The diffusion of ions across the plasma membrane of the axon C. The diffusion of neurotransmitters across the plasma membrane D. The endocytosis of neurotransmitters E. The diffusion of ions across the plasma membrane in the neurosoma