Week 1 Part 1: Homeostasis & Cell Physiology

Comparator

________ determines a set point (physiological range) and is where a variable is to be maintained.

Micturition

________ (urination)- increases after the flow of urine has started.

Pathology

________ (illness or death) can happen when changes are be too great or too rapid to be controlled by feedback mechanisms e.g.

Stimulus

________ occurs in internal /external environment that shifts the variable actual value and disturbs homeostasis and shifts the variable.

stable internal environment

The endocrine and nervous systems are particularly important as they allow communication- enables the body to maintain a(n) ________ and to adapt to changes in circumstances.

Sensor

________ obtains current info about a given variable.

dynamic balance

There is a(n) ________ between the set level and input at the comparator, an output to target organs.

Viruses

________ or bacteria can change the bodys internal chemistry.

Effector target organs

________ where the signal has its effect, carries out the process to adjust the controlled variable.Feedback loops.

comparator output

The ________ (efferent arm) will act to decrease (⬇) the value of the variable.

Long distance communication

________: electrical and chemical (neurotransmitters, which use specialised long neurones and hormones, which use endocrine signalling)

maintenance of stable internal environment

The ________ is essential for the normal healthy function of the body's cells, tissues and organs.

uterus contracts

The ________ more frequently and with greater strength after it has begun to contract.

current value

It compares ________ from the afferent pathway (input) to a desired value within the physiological range.

Sensor

________ (receptor)- detects the variable, tells when something is not within the acceptable range.

comparator output

The ________ (efferent arm) will act to increase (⬆) the value of the variable.