ANP 1105 UNIVERSITY OF OTTAWA
MIDTERM 1 EXAMPREP 2026
SOLVED QUESTIONS FULL
SOLUTION SET
◉ Homeostasis definition. Answer: to maintain relatively stable internal
conditions even though there is continuous change in outside world
◉ Dynamic state of equilibrium involving many systems. Answer:
adequate blood levels
heart activity monitored and adjusted
wastes must not accumulate
maintenance of body temperature
◉ Steps of homeostatic control. Answer: 1. Stimulus
2. Receptor
3. Input
4. Output
5. Response
◉ Stimulus (homeostasis). Answer: produces change in variable
◉ Receptor (homeostasis). Answer: detects change
,◉ Input (homeostasis). Answer: information sent along afferent pathway
to control center
◉ Output (Homeostasis). Answer: information sent along efferent
pathway to effector
◉ Response (homeostasis). Answer: feeds back to reduce the effect of
stimulus and returns variable to homeostatic level
◉ How does the body keep its internal state. Answer: constant
monitoring and regulation
communication
◉ Negative feedback. Answer: a mechanism of response in which a
stimulus initiates reactions that reduce the stimulus
◉ Examples of negative feedback. Answer: Regulation of body
temperature (a nervous system mechanism)
Regulation of blood glucose by insulin (an endocrine system
mechanism)
◉ Heat stimulus (homeostatic steps). Answer: Body temp rises
Receptors- temperature-sensitive cells in skin and brain
Control center- thermoregulatory center
, Effector- Sweat glands (body temp falls)
◉ Cold stimulus ( homeostasis steps). Answer: Body temp falls
Receptors-
Afferent
Control Center
Efferent
Effector - Skeletal muscles (shiver rasies heat)
◉ Positive feedback. Answer: Enhances or exaggerates original
stimulus, cascade effect
◉ Examples of postive feedback. Answer: blood clotting and child birth
◉ Steps of platelet plug formation. Answer: 1. break or tear occurs in
the blood vessel wall ( + feedback initated)
2. platelets adhere to the site and release chemicals
3. released chemicals attract more platlets
4. The platelet plug is fully formed ( feedback ends)
◉ Feedforward (anticipatory) response. Answer: Occurs in anticipation
of a change to the internal environment.
MIDTERM 1 EXAMPREP 2026
SOLVED QUESTIONS FULL
SOLUTION SET
◉ Homeostasis definition. Answer: to maintain relatively stable internal
conditions even though there is continuous change in outside world
◉ Dynamic state of equilibrium involving many systems. Answer:
adequate blood levels
heart activity monitored and adjusted
wastes must not accumulate
maintenance of body temperature
◉ Steps of homeostatic control. Answer: 1. Stimulus
2. Receptor
3. Input
4. Output
5. Response
◉ Stimulus (homeostasis). Answer: produces change in variable
◉ Receptor (homeostasis). Answer: detects change
,◉ Input (homeostasis). Answer: information sent along afferent pathway
to control center
◉ Output (Homeostasis). Answer: information sent along efferent
pathway to effector
◉ Response (homeostasis). Answer: feeds back to reduce the effect of
stimulus and returns variable to homeostatic level
◉ How does the body keep its internal state. Answer: constant
monitoring and regulation
communication
◉ Negative feedback. Answer: a mechanism of response in which a
stimulus initiates reactions that reduce the stimulus
◉ Examples of negative feedback. Answer: Regulation of body
temperature (a nervous system mechanism)
Regulation of blood glucose by insulin (an endocrine system
mechanism)
◉ Heat stimulus (homeostatic steps). Answer: Body temp rises
Receptors- temperature-sensitive cells in skin and brain
Control center- thermoregulatory center
, Effector- Sweat glands (body temp falls)
◉ Cold stimulus ( homeostasis steps). Answer: Body temp falls
Receptors-
Afferent
Control Center
Efferent
Effector - Skeletal muscles (shiver rasies heat)
◉ Positive feedback. Answer: Enhances or exaggerates original
stimulus, cascade effect
◉ Examples of postive feedback. Answer: blood clotting and child birth
◉ Steps of platelet plug formation. Answer: 1. break or tear occurs in
the blood vessel wall ( + feedback initated)
2. platelets adhere to the site and release chemicals
3. released chemicals attract more platlets
4. The platelet plug is fully formed ( feedback ends)
◉ Feedforward (anticipatory) response. Answer: Occurs in anticipation
of a change to the internal environment.
