cephalic phase

(noun)

The cephalic phase of gastric secretion occurs before food enters the stomach, especially while it is being eaten.

Related Terms

Examples of cephalic phase in the following topics:

  • Cephalic Phase

    • The cephalic phase of gastric secretion occurs even before food enters the stomach via neurological signals.
    • The cephalic phase of gastric secretion occurs even before food enters the stomach, especially while it is being eaten.
    • Neurogenic signals that initiate the cephalic phase of gastric secretion originate from the cerebral cortex, and in the appetite centers of the amygdala and hypothalamus.
    • When appetite is depressed this part of the cephalic reflex is inhibited.
    • Cephalic phase causes ECL cells to secrete histamine and increase HCl acid in the stomach.

  • Veins of the Upper Limbs

    • The major superficial veins of the upper limb are the cephalic, median cubital and basilic veins.
    • The basilic vein follows a similar path but is located medially to the cephalic vein.

  • Anencephaly

    • Anencephaly is a cephalic disorder that results from a neural tube defect that occurs when the cephalic (head) end of the neural tube fails to close, usually between the 23rd and 26th day of pregnancy, resulting in the absence of a major portion of the brain, skull, and scalp.
    • Anencephaly is a cephalic disorder that results from a neural tube defect that occurs when the cephalic (head) end of the neural tube fails to close.

  • Ovarian Cycle

    • It is commonly divided into three phases: the follicular phase, ovulation, and the luteal phase.
    • However, some sources use a different set of phases: menstruation, proliferative phase, and secretory phase.
    • The follicular phase (or proliferative phase) is the phase of the menstrual cycle in humans and great apes during which follicles in the ovary mature.
    • The luteal phase (or secretory phase) is the latter phase of the menstrual or estrous cycle.
    • Some sources define the end of the luteal phase to be a distinct ischemic phase.

  • Gastric Phase

    • The gastric phase is a period in which swallowed food activates gastric activity in the stomach.
    • The gastric phase is a period in which swallowed food and semidigested protein (peptides and amino acids) activate gastric activity.
    • About two-thirds of gastric secretion occurs during this phase .
    • Below pH of two, stomach acid inhibits the parietal cells and G cells: a negative feedback loop that winds down the gastric phase as the need for pepsin and HCl declines.
    • During the gastric phase, gastrin is secreted.

  • Hormonal Regulation of the Female Reproductive Cycle

    • It is divided into three stages: follicular phase, ovulation, and the luteal phase.
    • The follicular phase (or proliferative phase) is the phase of the menstrual cycle during which follicles in the ovary mature.
    • It is highest and most important during the first week of the follicular phase.
    • It also causes endometrial cells to produce receptors for progesterone, which helps prime the endometrium to the late proliferative phase and the luteal phase.
    • The main hormone associated with this stage is progesterone, which is produced by the growing corpus luteum and is significantly higher during the luteal phase than other phases of the cycle.

  • Intestinal Phase

    • The intestinal phase occurs in the duodenum, responds to arriving chyme, and moderates gastric activity via hormones and nervous reflexes.
    • The intestinal phase is the stage of digestion in which the duodenum responds to arriving chyme and moderates gastric activity through hormones and nervous reflexes.
    • The intestinal phase of digestion occurs in the duodenum, the first segment of the small intestine.

  • Onset of Labor

    • Prodromal labor, which includes the latent phase of labor, marks the initial stages of parturition.
    • The latent phase is generally defined as beginning at the point at which the woman perceives regular uterine contractions.
    • Cervical effacement (the thinning and stretching of the cervix and cervical dilation) occurs during the closing weeks of pregnancy and are usually complete, or near complete, by the end of the latent phase.
    • The latent phase ends with the onset of the active phase, which is marked by an accelerated cervical dilation.

  • Steps of Tissue Repair

    • The wound healing process can be characterized by four overlapping phases:
    • Upon wounding, the first phase of the wound response is concerned with maintaining homoeostasis within the body.
    • This phase is very quick.
    • The proliferative phase can itself be divided into four phases; in the case of shallow wounds the first two steps may not occur:
    • The phases of wound healing during an inflammatory response to infection.

  • Micturition and the Micturition Reflex

    • Micturition consists of two phases:
    • The storage phase- a relaxed bladder in which urine slowly fills the bladder
    • Voiding phase- a contracted bladder that forces the external sphincter open and discharges urine through the urethra.
    • During the storage phase the internal urethral sphincter remains tense and the detrusor muscle relaxed by sympathetic stimulation.
    • During the voiding phase of micturition, parasympathetic stimulation causes the internal urethral sphincter to relax.