What would occur if ACh was not removed from the nicotinic receptors on skeletal muscle cells?
a. the cell would relax.
b. the cell would repolarize with the opening of chloride channels.
c. the cell would remain contracted until fatigued.
d. sodium would continue to move into the cell causing excitation.
e. both (c) and (d) above.
E
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The internal space within each kidney that houses the blood vessels, lymphatic vessels, nerves, calyces, and renal pelvis is called the renal ________.
Fill in the blank(s) with the appropriate word(s).
The pancreas produces ________ secretions that include digestive enzymes and hormones, respectively
A) serous and sebaceous B) mucous and acid C) merocrine and holocrine D) exocrine and endocrine E) secretory and absorptive
Which of the following contributes to the atom’s atomic number?
a. proton b. neutron c. electron d. both proton and neutron
The portion of the digestive tract that receives food directly from the oral cavity is the ________.
A. esophagus B. larynx C. laryngopharynx D. nasopharynx E. oropharynx