Cells use membranes to help maintain set ranges of ion concentrations inside and outside the cell. Which of the following ions is the most abundant outside a typical mammalian cell?
(a) Na+
(b) K+
(c) Ca2+
(d) Cl–
(a)
You might also like to view...
Which of the following diseases is a synonym for ringworm infection of the nails?
A) tinea barbae B) tinea cruris C) tinea nigra D) tinea unguium
Male sticklebacks that see a model of a fish with a red belly will attack it, thinking it is a breeding male. They do not attack model fish without a red belly. This is an example of
A. learned behavior. B. imprinting. C. fixed action pattern. D. taxis. E. reflex.
Which of the following statements is false?
a. Whales use their jaws to hear. b. Whales lack a pair of middle ears. c. Killer whales use echolocation and have ears that are sensitive to high-frequency sounds. d. Humpback whales emit very low-pitched sounds that travel long distances underwater. e. Sound waves are transmitted through a layer of fat before being transduced in whales.
A healthy male will release ____ sperms during one ejaculation.
A. 300 B. 3,000 C. 30,000 D. 300,000,000