Question

unit 1 cumulative test (characteristics of life, biomolecules, cell structure and trans...
12 of 42
possible points:
in temperature regulation, the hypothalamus (gland)) triggers sweat production. sweat glands move ions like sodium and chloride across the cell membrane against (up) the concentration gradient, which helps draw water to the skin surface for cooling. what is the relationship between cell trans
feedback, and homeostasis in this example?

○ in this process the negative feedback process triggers the sweat glands to move ions passively across the cell membrane to the skin surface for cooling, which brings the body into homeostasis.

○ in this process a positive feedback system triggers sweat glands to move ions passively across the cell membrane to skin surface for cooling, which brings the body into homeostasis.

○ in this process a positive feedback system triggers sweat glands to move ions actively across the cell membrane to skin surface for cooling, which brings the body into homeostasis.

○ in this process a negative feedback system triggers sweat glands to move ions actively across the cell membrane to skin surface for cooling, which brings the body into homeostasis.

Explanation:

1. First, analyze the movement of ions: Moving ions against the concentration gradient requires active transport (energy - consuming), so the ion movement here is active, eliminating options with "passively".
2. Then, analyze the feedback type: Temperature regulation (cooling the body when it's too hot) is a negative feedback mechanism, as it works to reverse the deviation from the set - point (normal body temperature) and restore homeostasis. Positive feedback amplifies a change, which is not the case here. So the correct option should describe a negative feedback system triggering active ion transport for cooling to achieve homeostasis.

Answer:

In this process a negative feedback system triggers sweat glands to move ions actively across the cell membrane to skin surface for cooling, which brings the body into homeostasis.