Which of the following statements is FALSE?
A) The shape and number of layers of epithelial cells can change if they are subjected to long term irritation or abnormal conditions.
B) The function of psuedostratified columnar epithelial tissue in the respiratory passages is to move mucus and debris from the passageways.
C) The cells of simple squamous epithelial tissue contain many secretory vesicles filled with mucous and are therefore the most highly resistant to irritations.
D) Cells that are responsible for secretion or absorption are larger because they contain more organelles to support their function.
E) Cells with the major function of secretion or absorption are usually cuboidal and columnar in shape.
Ans: C) The cells of simple squamous epithelial tissue contain many secretory vesicles filled with mucous and are therefore the most highly resistant to irritations.
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Match the structure or compound to its function.
1. transporter for iron absorption 2. transports iron to the blood 3. hormone that decreases iron absorption 4. blocks cholesterol absorption 5. transporter for cholesterol absorption A. ezetimbe B. ferroportin C. hepcidin D. DMT1 E. NPC1L1
The moderator band is located in the
A) right ventricle. B) left ventricle. C) left atrium. D) interventricular sulcus. E) right atrium.
In the absence of extracellular Ca++, an action potential in a motor neuron failed to initiate contraction of the innervated skeletal muscle because of:
A. inhibition of Ca++ influx into the innervated muscle B. inhibition of ACh binding to receptors on the muscle end plate C. stimulation of ACh degradation D. inhibition of ACh release from the motor neuron E. inhibition of Ca++ binding to troponin C in the innervated muscle
The temporomandibular joint is a/an ________ joint.
A. osseous B. fibrous C. synovial D. bony E. cartilaginous