When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods?
A) latent period
B) fatigue period
C) relaxation period
D) refractory period

refractory period is the correct answer.

Explanation:

A refractory period happens when the muscle and nerve are unable to respond to the additional stimulation temporarily.

A refractory period occurs because sodium ions channels are not activated during this period.

The refractory period differs among the individuals, it ranges from minutes to a day.

During this period many are temporarily not interested in sexual activity and their penis can be hypersensitive or some of the men are not able to sustain an erection during this period.

in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;