A small sac of gland cells arranged around a space into which they secrete their product is called a(n) __________.
A. areolus
B. acinus
C. ductus
D. lobule
E. varix
B. acinus
You might also like to view...
During a tennis match, you decide how and where to hit the ball. Explain how the premotor cortex is involved in your decisions
What will be an ideal response?
The conducting zone contains all of the following EXCEPT the ________.
A. primary bronchi B. respiratory bronchioles C. larynx D. terminal bronchioles
Which of the following statements correctly describes the relationship between DNA, RNA, and transcription factors?
A) There is only one transcription factor for each region of DNA encoding RNA. B) Transcription factors must always bind close to the transcription start site. C) Phosphorylation is one way of regulating interactions between proteins required for transcription of DNA. D) Transcription factors carry out the process of transcription themselves.
A motor unit within the powerful quadriceps muscle would
A. generally contain less than ten fibers. B. be much like those in the eye muscles. C. generally contain several hundred fibers. D. contain several motor neurons.