In a sperm’s journey out of the body what is
the correct order of structures it encounters
either directly or by way of the structure’s
secretions?
1. bulbourethral gland
2. vas deferens
3. seminal vesicle
4. epididymus
5. urethra
a. 4-2-1-3-5
b. 4-1-2-3-5
c. 4-2-3-1-5
d. 2-4-3-1-5
e. 2-4-1-3-5
A
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A. When bound to their ligand, both types enter the nucleus to activate transcription. B. Both types cause GDP to be exchanged for GTP in a G protein. C. Both types undergo a conformational change when they bind to their ligand. D. When activated the signals of both types are transduced across the plasma membrane.
Your brother mentions that several days ago he began to feel as if he was coming down with a cold, but now is no longer experiencing any signs or symptoms and feels fine. Having just studied the infectious disease process in your microbiology course, you immediately recognize that he is describing the ________ phase of illness.
A. convalescent B. acute C. prodromal D. incubation
The variation seen among individuals when each individual shows one of two—or very few—easily distinguishable traits is known as _____ variation.
a. continuous b. discontinuous c. dominant d. recessive
Which of the following is NOT a form of passive
transport? a. osmosis b. facilitated diffusion c. simple diffusion d. exocytosis e. none of these