Animal Stress Physiology MCQS

1. What is the primary physiological response of animals to stress? A) Increased heart rate B) Decreased respiration rate C) Increased appetite D) Decreased adrenaline levels Answer: A) Increased heart rate 2. Which hormone is often referred to as the “stress hormone” in animals? A) Insulin B) Thyroxine C) Cortisol D) Estrogen Answer: C) Cortisol 3. What effect does chronic stress have on the immune system of animals? A) Enhances immune response B) Suppresses immune response C) Has no effect on the immune system D) Decreases blood pressure Answer: B) Suppresses immune response 4. Which of the following physiological changes occurs during the “fight or flight” response to stress? A) Decreased blood glucose levels B) Increased digestion and absorption C) Dilation of blood vessels in the skin D) Constriction of pupils Answer: C) Dilation of blood vessels in the skin 5. What is the role of the sympathetic nervous system in the stress response? A) It decreases heart rate B) It stimulates the release of cortisol C) It activates the “rest and digest” response D) It prepares the body for action Answer: D) It prepares the body for action 6. Which organ is particularly sensitive to the effects of stress hormones like cortisol? A) Liver B) Kidneys C) Heart D) Brain Answer: D) Brain 7. What is the term for the adaptive response to stress that helps restore homeostasis? A) Adaptation B) Allostasis C) Homeostasis D) Hypertrophy Answer: B) Allostasis 8. Which of the following is NOT a behavioral response to stress in animals? A) Aggression B) Withdrawal C) Increased grooming D) Enhanced learning Answer: D) Enhanced learning 9. What is the term for the process by which stressors are perceived and interpreted by animals? A) Adaptation B) Allostasis C) Coping D) Appraisal Answer: D) Appraisal 10. Which physiological system plays a key role in regulating the stress response? A) Endocrine system B) Skeletal system C) Reproductive system D) Lymphatic system Answer: A) Endocrine system