Question

biting flies can transmit diseases and cause loss of blood for animals in nature. horses have developed behaviors to repel biting flies such as ear twitching, head tossing, leg stomping, and tail swishing. which statement best describes the interaction between body systems that allows horses to repel biting flies? a the nervous system senses the biting flies and sends a signal to the muscular system to move. b the circulatory system senses the biting flies and sends a signal to the nervous system to move. c the muscular system senses the biting flies and sends a signal to the integumentary system to move. d the integumentary system senses the biting flies and sends a signal to the circulatory system to move. which sequence best describes an interaction between the integumentary and excretory systems that helps maintain homeostasis? f heart rate increases → blood vessels constrict → blood pressure increases g blood vessel is damaged → platelets begin to clump → blood vessel ruptures h blood sugar levels rise → pancreas secretes insulin → blood sugar continues to rise j body temperature increases → glands release sweat → body temperature decreases when the skin comes in contact with an irritant, receptors in the skin send signals to the spinal cord. the signal is then sent to the brain for processing, and the individual begins to scratch the affected area. which two systems are most likely interacting when a person experiences itching caused by a skin irritant? a circulatory and excretory b integumentary and nervous c digestive and muscular d respiratory and lymphatic which statement best describes an interaction between the muscular system and the respiratory system? a the hormone adrenaline causes blood vessels to contract and send more blood to major muscles. b metabolic wastes generated by muscle cells are eliminated in urine. c the diaphragm contracts causing the chest cavity to expand, which draws air into the lungs. d nutrients absorbed in the small intestine are transported in blood to the brain.

Explanation:

First Question (Horses repel biting flies)

To determine the correct statement, we analyze the functions of body systems:

• The nervous system (brain, spinal cord, nerves) detects stimuli (biting flies) and sends signals. The muscular system produces movement (ear twitching, etc.).
• Option A: Nervous system senses, signals muscular system to move. This matches the interaction (sensing fly, moving to repel).
• Option B: Circulatory system (blood, vessels) doesn’t sense stimuli; sensing is nervous system’s role. Eliminate B.
• Option C: Muscular system doesn’t sense; sensing is integumentary/nervous. Eliminate C.
• Option D: Integumentary (skin) senses, but circulatory system doesn’t move in response. Eliminate D.

Homeostasis is maintaining internal balance. Analyze each option:

• Option F: Heart rate, blood vessels, blood pressure involve circulatory/nervous, not integumentary/excretory. Eliminate F.
• Option G: Blood vessel damage and platelets involve circulatory, not excretory/integumentary. Eliminate G.
• Option H: Blood sugar and insulin involve endocrine/digestive, not the two systems. Eliminate H.
• Option J: Body temperature increases (stimulus), integumentary system (skin glands) release sweat (excretory function of sweat glands), which cools the body (decreases temperature). This shows integumentary (skin) and excretory (sweat glands) interaction for homeostasis.

Identify interacting systems:

• The skin (integumentary system) has receptors that detect the irritant. These receptors send signals to the spinal cord/brain (nervous system) for processing, leading to scratching (movement, but the key interaction is sensing and signaling).
• Option A: Circulatory (blood) and excretory (waste removal) don’t involve sensing skin irritants. Eliminate A.
• Option B: Integumentary (skin) senses the irritant, nervous system processes the signal. This matches the description (receptors in skin send signals to spinal cord/brain).
• Option C: Digestive (food processing) and muscular (movement) aren’t involved in skin sensing. Eliminate C.
• Option D: Respiratory (breathing) and lymphatic (immune) aren’t involved. Eliminate D.

Answer:

A. The nervous system senses the biting flies and sends a signal to the muscular system to move.

Second Question (Integumentary and excretory homeostasis)