Which mechanism requires energy?

A. diffusion of oxygen into a red blood cell

B. diffusion of ions through a potassium channel

C. osmosis

D. exocytosis

Phasic receptors Phasic receptors slowly decrease the frequency of action potentials generated to a constant stimulus. detect parameters that the body must continuously assess.

How would you calculate density for a cubic solid?

The nurse refers an older adult client for further evaluation after the nurse assesses warm skin and brown pigmentation around the ankles. the nurse should note the possibility of what health problem when making the referral?

In the sympathetic nervous system, the spread of information occurs from one neuronal pool to multiple neuronal pools. This allows for a broad distribution of a specific input.

A pure substance that contains the same kinds of atoms with similar physical and chemical properties

The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what conclusions can be drawn? A diagram of a pedigree chart.

If the allele frequency of the HbS allele is 0.3 in a population, what is the frequency of the HbA allele (assuming this is a two-allele system) ?

How do the nucleotides in dna pair?

Which of the following describes how the septum in the heart affects blood flow? a.) It pumps blood out of the heart to the rest of the cardiovascular system when heart muscles contract. b.

Ethanol is a fuel that can be made from corn. One of the benefits of using a biomass fuel like ethanol is A. It can only be used to power certain types of machines. B. It is a nonrenewable resource. C. It is a renewable resource. D.