Which cell is filled with hemoglobin and transports oxygen?
A) Neuron
B) Sperm
C) Cardiac muscle cell
D) Red blood cell
Answer: D
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In response to action potentials arriving from the transverse tubules, the sarcoplasmic reticulum releases
A) Acetylcholine. B) Sodium ions. C) Potassium ions. D) Calcium ions E) Hydrogen ions.
Postganglionic sympathetic axons are carried from the sympathetic trunk to the spinal nerve by the
A. pterygopalatine ganglion. B. splanchnic nerves. C. superior cervical ganglion. D. gray rami communicantes. E. white rami communicantes.
After activation of C3 of the complement system, which of these is a role of its component part, C3b?
A. It acts as an enzyme to convert nitric oxide into hydrogen peroxide. B. It causes vasodilation of local blood vessels. C. It acts as a chemotaxin for macrophages. D. It stimulates the conversion of monocytes to neutrophils. E. It acts as an opsonin that is recognized by phagocytes targeting the microbe for destruction.
The auditory ossicles are in the inner ear
Indicate whether the statement is true or false