You are looking at a cell with the electron microscope and you notice the following characteristics: presence of many mitochondria and lysosomes; few, if any, Golgi apparatus; and many ribosomes. Which of the following is the most likely function of that cell?
A. Absorption of nutrients
B. Modification of protein
C. DNA replication
D. Secretion of lipids
E. Intracellular digestion
Answer: E
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Select the incorrect association
a. chemoreceptor/oxygen concentration. b. mechanoreceptor/skeletal muscle stretch. c. nociceptor/solute concentration. d. photoreceptor/light. e. thermoreceptor/heat and cold.
What is the function of the internal acoustic meatus?
A) It serves as a passageway for blood vessels and the facial and vestibulocochlear nerves. B) It serves as a passageway for the hypoglossal nerve. C) It serves as a hollow space that lightens the weight of the cranium. D) It serves the hollow space of the external ear canal ending at the tympanic membrane. E) It contains the tooth sockets for the upper teeth.
Skeletal muscle cells have numerous mitochondria within their endoplasmic reticulum and this special organization is called the mitochondrial reticulum
Indicate whether the statement is true or false
The hearts nodal cells have a more negative resting potential than neurons do, because nodal cells lack leak channels for sodium and potassium ions
Indicate whether this statement is true or false.