List the structures involved in the production of semen and indicate their contribution.
What will be an ideal response?
Testes - produce sperm and sex hormones
Epididymides - site of maturation and storage of sperm
Vasa deferentia - conduction and storage of sperm
Seminal vesicles - contributes fructose to the semen
Prostate gland - secretes a milky alkaline fluid that helps activate the sperm
Bulbourethral glands - Production of pre-ejaculate fluid
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A symbiont could be a(n):
A) commensal. B) opportunist. C) parasite. D) all of the above
Slow-growing NTM whose colonies are pigmented when grown in the dark or the light are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
The exotoxin produced by C. tetani is
A. tetanoxin. B. exotetanus. C. tetanospasmin. D. endospasmin.
A receptor on the cell surface usually has several domains. The function of the external domain is:
a. transmitting the signal to the inside of the cell. b. holding the receptor within the membrane. c. attaching the receptor to the DNA. d. functioning as an enzyme. e. binding the signaling molecule.