It is possible for cells to communicate directly (via a connection of the cytoplasm) with each other by using
A) Gap junctions.
B) Paracrine signaling.
C) Endocrine signaling.
D) Autocrine signaling.
Answer: A
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Animals are capable of movement because they have a unique type of cell, the __________
Fill in the blank with correct words.
In mammals, the __________ is the main blood vessel leading from the lungs to the heart
Fill in the blank with correct words.
Select the incorrect statement regarding ribosomes
a. they are composed of RNA. b. they assemble polypeptides. c. they may be bound to endoplasmic reticulum. d. they are comprised of 2 parts. e. they are membrane-bounded.
The pitch of the sound produced by the vocal folds is controlled by the
A. force of air moving past them. B. frequency of the vibrations. C. thickness of the thyroid cartilage. D. size of the glottis. E. amplitude of the vibrations.