Regulation by second messengers
For lipophobic hormones that cannot pass the cellular membrane, activity is mediated and amplified within…
nathan
Specificity of hormones: target tissue
Hormones target a limited number of cells or tissues based on the presence of a…
Transport of hormones: blood supply
Hormones are released from the endocrine glands directly into the bloodstream via which they travel…
DNA libraries
DNA libraries are extensive collections of relatively short DNA sequences that represent genome, single chromosome,…
Reflexes
A reflex action, also known as a reflex, is an involuntary and nearly instantaneous movement in…
Optical Instruments, including the human eye
Lenses are found in a huge array of optical instruments, ranging from the simple magnifying…
Lens aberration
Lens aberration is the deviation of light rays from a single focus; a defect in…
Combination of lenses
An array of simple lenses with a common axis can be used to multiply the…
Thin Lenses
A thin lens allows rays to refract but does not allow properties such as dispersion…
Spherical mirrors
A mirror is a reflective surface that light does not pass through, made by a…