Biology Review: Homeostasis, Energy, & Proteins

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What role does the hypothalamus play in temperature regulation?

Back

The hypothalamus acts as a thermostat, detecting changes in body temperature and initiating responses to maintain homeostasis, primarily through negative feedback mechanisms.

Front

What is vasodilation?

Back

Vasodilation is the widening of blood vessels, which increases blood flow to the skin, helping to release heat and lower body temperature.

Front

What is the process of sweating and how does it help in thermoregulation?

Back

Sweating is the release of water from sweat glands onto the skin surface. As the water evaporates, it cools the body, helping to lower temperature.

Front

What is a feedback mechanism?

Back

A feedback mechanism is a biological process that uses the conditions of one component to regulate the function of another, often to maintain homeostasis.

Front

What is the difference between negative and positive feedback mechanisms?

Back

Negative feedback mechanisms counteract changes to maintain stability, while positive feedback mechanisms amplify changes to push a system away from its starting state.

Front

What are the inputs and outputs of photosynthesis?

Back

Inputs: Carbon dioxide, Water, and Energy; Outputs: Glucose and Oxygen.

Front

What type of reaction is photosynthesis classified as?

Back

Photosynthesis is classified as an anabolic and endothermic reaction, as it builds glucose molecules and requires energy.

Front

What is the significance of maintaining homeostasis in living organisms?

Back

Maintaining homeostasis is crucial for the survival of organisms, as it ensures optimal conditions for cellular processes and overall functioning.

Front

What are some internal and external changes that can affect homeostasis?

Back

Internal changes include fluctuations in body temperature and pH levels, while external changes can include environmental temperature and humidity.