C3.3.1-7 Homeostasis

What is homeostasis?

• The ability to reproduce under varying environmental conditions.

• The process by which organisms adapt to their environment.

• The regulation of external conditions to benefit an organism.

• The maintenance of stable internal conditions regardless of external fluctuations.

Which type of feedback loop increases the distance between the current range and the original level?

• Negative feedback loop

• Neutral feedback loop

• Positive feedback loop

• Static feedback loop

What is the primary role of negative feedback loops in homeostasis?

• To eliminate the need for energy in physiological processes.

• To amplify changes and increase variability.

• To decrease the efficiency of energy use within organisms.

• To maintain stability by returning values to their original range.

Which organ is primarily discussed in relation to glucose homeostasis?

• Pancreas

• Liver

• Heart

• Lungs

What hormone does the pancreas secrete when blood glucose levels are high?

• Cortisol

• Glucagon

• Insulin

• Adrenaline

What is the primary function of insulin in glucose homeostasis?

• To decrease glucose absorption in cells.

• To increase blood glucose levels.

• To break down glycogen into glucose.

• To convert glucose into glycogen and facilitate glucose uptake by cells.

What is Type 1 diabetes characterized by?

• Excessive insulin receptors on cells

• High sensitivity to insulin

• Immune system attacking beta cells in the pancreas

• Overproduction of insulin

Which hormone is involved in increasing the cellular metabolism and heat production as part of thermoregulation?

• Leptin

• Estrogen

• Insulin

• Thyroxine

What is the primary cause of Type 2 diabetes?

• Immune system dysfunction

• Lack of insulin production

• Excessive production of glucagon

• Decreased sensitivity to insulin due to lack of insulin receptors

Which tissue type is involved in thermoregulation by insulating the body and serving as a respiratory substrate?

• Epithelial tissue

• Adipose tissue

• Muscle tissue

• Nervous tissue