When dietary intake of calcium is low, the body takes calcium from bone. when dietary intake of calcium is low, the body takes calcium from bone.

a. True

b. False?

The space between two neurons or between a neuron and a receptor organ is known as a

The three-dimensional structure of a protein is determined by its primary, secondary, and tertiary structures. Define the primary, secondary, and tertiary structures. What are some of the common secondary structures?

Pneumocystis jiroveci is a member of the human microbiota that is: a) an obligate parasite. b) an obligate parasite that cannot survive outside the lungs. c) a common member of the human respiratory microbiota.

Which of the following would not cause habitat change? a. building a dam on a river b. a hurricane c. introducing new hiking trails d. none of the above

What are the mechanisms that have claimed to explain the movement of Earth's tectonic plates. A. slab pull and sea-floor spreading B. mantle convection and continental drift C. mantle convection, ridge push, and slab pull D.

A shift of the resting transmembrane potential toward 0 mv is called

Rabbits were introduced to australia in the 1800s and spread quickly across the continent. the rabbits soon burrowing animals burrows and started eating their food. what enabled the nonantum rabbits to take over the continent of australia

Name a type of cell that relies on coupled transport to perform its functions

How does the skin regulate body temperature?

Which of the 4 groups of organic compounds do enzymes belong in?