Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
field capacity fcit is the capacity of a field to hold the amount of water against gravitational forces it is expressed as the percentage of the dry
water absorptionwater status of a plant is determined by two major factors i water absorption and ii water loss we deal with water absorption in this
physical concepts of plant water relation - osmosisosmosis is a special case of diffusion here the movement of water solvent takes place from a
physical concepts of plant water relation - diffusiondiffusion is a spontaneous process that leads to net movement of a substance from a region of
basic physical concepts of plant water relationthe main idea of this section is to explain the concept of chemical potential of water or water
relation of water content to functionsif an aquatic plant appearing turgid is removed from water and left in the open it quickly wilts the water
plant waterrole of water in plants you know that water is the main constituent of plant cells it performs the following major functionswater as a
pheromones serving functions other than reproductionbesides sexual responses as described above pheromones mediate several other types of behaviour
neural basis of responses to sex pheromonesthe ability of insects to detect and discriminate between a variety of pheromones with great sensitivity
pituitarythe pituitary is also known as hypophysis it is composed of two embryologically distinct tissue the anterior pituitary or adenohypophysis is
action of hormoneswe said earlier that hormones are released into the blood stream or extracellular fluid and therefore reach most of the cells of
secretion of hormonesthe secretion of most hormones except steroid is by the process of exocytosis figure summarises the formation transport release
synthesis and storage of hormonethe synthesis and storage of hormone depends on the nature of the hormone steroid hormones are secreted in diffuse
types of neural networksneural networks can be grouped into sensory filter networks that are organised so as to pass on only certain features of a
properties and functions of synapsesthere is an interval between depolarisation of the presynaptic terminal and the earliest appearance of a
conduction in myelinated axonsthe myelin sheath provides insulation for the axon preventing movements of na and k through the membrane therefore if
conductionan action potential occurs at one point along the axon yet we know that neurological impulses are not fixed they travel along a neuron so
all or none responsea very weak stimulus does not result in an action potential the stimulus must have a certain strength to evoke an excitation this
normal 0 false false false en-in x-none x-none
neurotransmitterswe know that transmission of signals from nerves to muscles is affected by acetylcholine a transmitter substance similarly
synapse nervous system structural feature of unique importance in the nervous tissue is the synapse a synapse is the anatomical site at which
types of axonsaxons are of two types myelinated and non-myelinatedin the case of myelinated axons the neurilemma is ensheathed by another covering
neurons - nervous systemalthough neurons occur in a great variety of sizes and morphological forms they have a basic plan of structure representing
contraceptive pill - reproductionabout sixty million women in the world are currently using oral steroid contraceptives these contraceptives usually